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+### Composer ###
+composer.phar
+/vendor/
+
+/var/
+
+*.db
--- a/LICENSE.md
+++ b/LICENSE.md
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+### GNU AFFERO GENERAL PUBLIC LICENSE
+
+Version 3, 19 November 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc.
+<https://fsf.org/>
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+### Preamble
+
+The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works. By contrast,
+our General Public Licenses are intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains
+free software for all its users.
+
+When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+Developers that use our General Public Licenses protect your rights
+with two steps: (1) assert copyright on the software, and (2) offer
+you this License which gives you legal permission to copy, distribute
+and/or modify the software.
+
+A secondary benefit of defending all users' freedom is that
+improvements made in alternate versions of the program, if they
+receive widespread use, become available for other developers to
+incorporate. Many developers of free software are heartened and
+encouraged by the resulting cooperation. However, in the case of
+software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and
+letting the public access it on a server without ever releasing its
+source code to the public.
+
+The GNU Affero General Public License is designed specifically to
+ensure that, in such cases, the modified source code becomes available
+to the community. It requires the operator of a network server to
+provide the source code of the modified version running there to the
+users of that server. Therefore, public use of a modified version, on
+a publicly accessible server, gives the public access to the source
+code of the modified version.
+
+An older license, called the Affero General Public License and
+published by Affero, was designed to accomplish similar goals. This is
+a different license, not a version of the Affero GPL, but Affero has
+released a new version of the Affero GPL which permits relicensing
+under this license.
+
+The precise terms and conditions for copying, distribution and
+modification follow.
+
+### TERMS AND CONDITIONS
+
+#### 0. Definitions.
+
+"This License" refers to version 3 of the GNU Affero General Public
+License.
+
+"Copyright" also means copyright-like laws that apply to other kinds
+of works, such as semiconductor masks.
+
+"The Program" refers to any copyrightable work licensed under this
+License. Each licensee is addressed as "you". "Licensees" and
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+
+To "modify" a work means to copy from or adapt all or part of the work
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+the earlier work or a work "based on" the earlier work.
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+A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy. Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies. Mere interaction with a user
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+An interactive user interface displays "Appropriate Legal Notices" to
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+tells the user that there is no warranty for the work (except to the
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+the interface presents a list of user commands or options, such as a
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+
+#### 1. Source Code.
+
+The "source code" for a work means the preferred form of the work for
+making modifications to it. "Object code" means any non-source form of
+a work.
+
+A "Standard Interface" means an interface that either is an official
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+The "System Libraries" of an executable work include anything, other
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+
+The Corresponding Source need not include anything that users can
+regenerate automatically from other parts of the Corresponding Source.
+
+The Corresponding Source for a work in source code form is that same
+work.
+
+#### 2. Basic Permissions.
+
+All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met. This License explicitly affirms your unlimited
+permission to run the unmodified Program. The output from running a
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+rights of fair use or other equivalent, as provided by copyright law.
+
+You may make, run and propagate covered works that you do not convey,
+without conditions so long as your license otherwise remains in force.
+You may convey covered works to others for the sole purpose of having
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+facilities for running those works, provided that you comply with the
+terms of this License in conveying all material for which you do not
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+you must do so exclusively on your behalf, under your direction and
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+copyrighted material outside their relationship with you.
+
+Conveying under any other circumstances is permitted solely under the
+conditions stated below. Sublicensing is not allowed; section 10 makes
+it unnecessary.
+
+#### 3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+No covered work shall be deemed part of an effective technological
+measure under any applicable law fulfilling obligations under article
+11 of the WIPO copyright treaty adopted on 20 December 1996, or
+similar laws prohibiting or restricting circumvention of such
+measures.
+
+When you convey a covered work, you waive any legal power to forbid
+circumvention of technological measures to the extent such
+circumvention is effected by exercising rights under this License with
+respect to the covered work, and you disclaim any intention to limit
+operation or modification of the work as a means of enforcing, against
+the work's users, your or third parties' legal rights to forbid
+circumvention of technological measures.
+
+#### 4. Conveying Verbatim Copies.
+
+You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
+appropriately publish on each copy an appropriate copyright notice;
+keep intact all notices stating that this License and any
+non-permissive terms added in accord with section 7 apply to the code;
+keep intact all notices of the absence of any warranty; and give all
+recipients a copy of this License along with the Program.
+
+You may charge any price or no price for each copy that you convey,
+and you may offer support or warranty protection for a fee.
+
+#### 5. Conveying Modified Source Versions.
+
+You may convey a work based on the Program, or the modifications to
+produce it from the Program, in the form of source code under the
+terms of section 4, provided that you also meet all of these
+conditions:
+
+-   a) The work must carry prominent notices stating that you modified
+    it, and giving a relevant date.
+-   b) The work must carry prominent notices stating that it is
+    released under this License and any conditions added under
+    section 7. This requirement modifies the requirement in section 4
+    to "keep intact all notices".
+-   c) You must license the entire work, as a whole, under this
+    License to anyone who comes into possession of a copy. This
+    License will therefore apply, along with any applicable section 7
+    additional terms, to the whole of the work, and all its parts,
+    regardless of how they are packaged. This License gives no
+    permission to license the work in any other way, but it does not
+    invalidate such permission if you have separately received it.
+-   d) If the work has interactive user interfaces, each must display
+    Appropriate Legal Notices; however, if the Program has interactive
+    interfaces that do not display Appropriate Legal Notices, your
+    work need not make them do so.
+
+A compilation of a covered work with other separate and independent
+works, which are not by their nature extensions of the covered work,
+and which are not combined with it such as to form a larger program,
+in or on a volume of a storage or distribution medium, is called an
+"aggregate" if the compilation and its resulting copyright are not
+used to limit the access or legal rights of the compilation's users
+beyond what the individual works permit. Inclusion of a covered work
+in an aggregate does not cause this License to apply to the other
+parts of the aggregate.
+
+#### 6. Conveying Non-Source Forms.
+
+You may convey a covered work in object code form under the terms of
+sections 4 and 5, provided that you also convey the machine-readable
+Corresponding Source under the terms of this License, in one of these
+ways:
+
+-   a) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by the
+    Corresponding Source fixed on a durable physical medium
+    customarily used for software interchange.
+-   b) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by a
+    written offer, valid for at least three years and valid for as
+    long as you offer spare parts or customer support for that product
+    model, to give anyone who possesses the object code either (1) a
+    copy of the Corresponding Source for all the software in the
+    product that is covered by this License, on a durable physical
+    medium customarily used for software interchange, for a price no
+    more than your reasonable cost of physically performing this
+    conveying of source, or (2) access to copy the Corresponding
+    Source from a network server at no charge.
+-   c) Convey individual copies of the object code with a copy of the
+    written offer to provide the Corresponding Source. This
+    alternative is allowed only occasionally and noncommercially, and
+    only if you received the object code with such an offer, in accord
+    with subsection 6b.
+-   d) Convey the object code by offering access from a designated
+    place (gratis or for a charge), and offer equivalent access to the
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+    may be on a different server (operated by you or a third party)
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+    Corresponding Source, you remain obligated to ensure that it is
+    available for as long as needed to satisfy these requirements.
+-   e) Convey the object code using peer-to-peer transmission,
+    provided you inform other peers where the object code and
+    Corresponding Source of the work are being offered to the general
+    public at no charge under subsection 6d.
+
+A separable portion of the object code, whose source code is excluded
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+included in conveying the object code work.
+
+A "User Product" is either (1) a "consumer product", which means any
+tangible personal property which is normally used for personal,
+family, or household purposes, or (2) anything designed or sold for
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+
+If you convey an object code work under this section in, or with, or
+specifically for use in, a User Product, and the conveying occurs as
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+Corresponding Source conveyed under this section must be accompanied
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+if neither you nor any third party retains the ability to install
+modified object code on the User Product (for example, the work has
+been installed in ROM).
+
+The requirement to provide Installation Information does not include a
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+updates for a work that has been modified or installed by the
+recipient, or for the User Product in which it has been modified or
+installed. Access to a network may be denied when the modification
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+
+Corresponding Source conveyed, and Installation Information provided,
+in accord with this section must be in a format that is publicly
+documented (and with an implementation available to the public in
+source code form), and must require no special password or key for
+unpacking, reading or copying.
+
+#### 7. Additional Terms.
+
+"Additional permissions" are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law. If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
+it. (Additional permissions may be written to require their own
+removal in certain cases when you modify the work.) You may place
+additional permissions on material, added by you to a covered work,
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+
+Notwithstanding any other provision of this License, for material you
+add to a covered work, you may (if authorized by the copyright holders
+of that material) supplement the terms of this License with terms:
+
+-   a) Disclaiming warranty or limiting liability differently from the
+    terms of sections 15 and 16 of this License; or
+-   b) Requiring preservation of specified reasonable legal notices or
+    author attributions in that material or in the Appropriate Legal
+    Notices displayed by works containing it; or
+-   c) Prohibiting misrepresentation of the origin of that material,
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+    material by anyone who conveys the material (or modified versions
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+
+All other non-permissive additional terms are considered "further
+restrictions" within the meaning of section 10. If the Program as you
+received it, or any part of it, contains a notice stating that it is
+governed by this License along with a term that is a further
+restriction, you may remove that term. If a license document contains
+a further restriction but permits relicensing or conveying under this
+License, you may add to a covered work material governed by the terms
+of that license document, provided that the further restriction does
+not survive such relicensing or conveying.
+
+If you add terms to a covered work in accord with this section, you
+must place, in the relevant source files, a statement of the
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+
+Additional terms, permissive or non-permissive, may be stated in the
+form of a separately written license, or stated as exceptions; the
+above requirements apply either way.
+
+#### 8. Termination.
+
+You may not propagate or modify a covered work except as expressly
+provided under this License. Any attempt otherwise to propagate or
+modify it is void, and will automatically terminate your rights under
+this License (including any patent licenses granted under the third
+paragraph of section 11).
+
+However, if you cease all violation of this License, then your license
+from a particular copyright holder is reinstated (a) provisionally,
+unless and until the copyright holder explicitly and finally
+terminates your license, and (b) permanently, if the copyright holder
+fails to notify you of the violation by some reasonable means prior to
+60 days after the cessation.
+
+Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License. If your rights have been terminated and not permanently
+reinstated, you do not qualify to receive new licenses for the same
+material under section 10.
+
+#### 9. Acceptance Not Required for Having Copies.
+
+You are not required to accept this License in order to receive or run
+a copy of the Program. Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance. However,
+nothing other than this License grants you permission to propagate or
+modify any covered work. These actions infringe copyright if you do
+not accept this License. Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+#### 10. Automatic Licensing of Downstream Recipients.
+
+Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License. You are not responsible
+for enforcing compliance by third parties with this License.
+
+An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations. If propagation of a covered
+work results from an entity transaction, each party to that
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+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License. For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+#### 11. Patents.
+
+A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based. The
+work thus licensed is called the contributor's "contributor version".
+
+A contributor's "essential patent claims" are all patent claims owned
+or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version. For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement). To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients. "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+A patent license is "discriminatory" if it does not include within the
+scope of its coverage, prohibits the exercise of, or is conditioned on
+the non-exercise of one or more of the rights that are specifically
+granted under this License. You may not convey a covered work if you
+are a party to an arrangement with a third party that is in the
+business of distributing software, under which you make payment to the
+third party based on the extent of your activity of conveying the
+work, and under which the third party grants, to any of the parties
+who would receive the covered work from you, a discriminatory patent
+license (a) in connection with copies of the covered work conveyed by
+you (or copies made from those copies), or (b) primarily for and in
+connection with specific products or compilations that contain the
+covered work, unless you entered into that arrangement, or that patent
+license was granted, prior to 28 March 2007.
+
+Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+#### 12. No Surrender of Others' Freedom.
+
+If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under
+this License and any other pertinent obligations, then as a
+consequence you may not convey it at all. For example, if you agree to
+terms that obligate you to collect a royalty for further conveying
+from those to whom you convey the Program, the only way you could
+satisfy both those terms and this License would be to refrain entirely
+from conveying the Program.
+
+#### 13. Remote Network Interaction; Use with the GNU General Public License.
+
+Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
+interacting with it remotely through a computer network (if your
+version supports such interaction) an opportunity to receive the
+Corresponding Source of your version by providing access to the
+Corresponding Source from a network server at no charge, through some
+standard or customary means of facilitating copying of software. This
+Corresponding Source shall include the Corresponding Source for any
+work covered by version 3 of the GNU General Public License that is
+incorporated pursuant to the following paragraph.
+
+Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU General Public License into a single
+combined work, and to convey the resulting work. The terms of this
+License will continue to apply to the part which is the covered work,
+but the work with which it is combined will remain governed by version
+3 of the GNU General Public License.
+
+#### 14. Revised Versions of this License.
+
+The Free Software Foundation may publish revised and/or new versions
+of the GNU Affero General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program
+specifies that a certain numbered version of the GNU Affero General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation. If the Program does not specify a version number of the
+GNU Affero General Public License, you may choose any version ever
+published by the Free Software Foundation.
+
+If the Program specifies that a proxy can decide which future versions
+of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+#### 15. Disclaimer of Warranty.
+
+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
+WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
+PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
+DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
+CORRECTION.
+
+#### 16. Limitation of Liability.
+
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
+CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
+ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
+NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
+LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
+TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
+PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+#### 17. Interpretation of Sections 15 and 16.
+
+If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+END OF TERMS AND CONDITIONS
+
+### How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these
+terms.
+
+To do so, attach the following notices to the program. It is safest to
+attach them to the start of each source file to most effectively state
+the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+        <one line to give the program's name and a brief idea of what it does.>
+        Copyright (C) <year>  <name of author>
+
+        This program is free software: you can redistribute it and/or modify
+        it under the terms of the GNU Affero General Public License as
+        published by the Free Software Foundation, either version 3 of the
+        License, or (at your option) any later version.
+
+        This program is distributed in the hope that it will be useful,
+        but WITHOUT ANY WARRANTY; without even the implied warranty of
+        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+        GNU Affero General Public License for more details.
+
+        You should have received a copy of the GNU Affero General Public License
+        along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper
+mail.
+
+If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source. For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code. There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for
+the specific requirements.
+
+You should also get your employer (if you work as a programmer) or
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. For more information on this, and how to apply and follow
+the GNU AGPL, see <https://www.gnu.org/licenses/>.
--- a/README.md
+++ b/README.md
@@ -0,0 +1,5 @@
+# KUL CW uurrooster generator
+Scraped het [effectief uurrooster](https://eng.kuleuven.be/studeren/opleidingen/burgerlijk-ingenieur/master-computerwetenschappen/effectief-uurrooster) en zet het om in een enkele ical file.
+
+# License
+This project is licensed under the AGPLV3+ license. See the [license](LICENSE.md) file for details.
--- a/composer.json
+++ b/composer.json
@@ -0,0 +1,25 @@
+{
+    "name": "principis/cw_uurrooster",
+    "type": "project",
+    "require": {
+        "kigkonsult/icalcreator": "^2.39",
+        "sabre/vobject": "^4.0",
+        "ext-curl": "*",
+        "ext-pdo": "*",
+        "ext-dom": "*",
+        "ext-libxml": "*",
+        "ext-ctype": "*"
+    },
+    "license": "AGPL",
+    "autoload": {
+        "psr-4": {
+            "Principis\\CwUurrooster\\": "src/"
+        }
+    },
+    "authors": [
+        {
+            "name": "Arthur Bols",
+            "email": "arthur@bols.dev"
+        }
+    ]
+}
--- a/composer.lock
+++ b/composer.lock
@@ -0,0 +1,353 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "6f36f01de08f5617a5885f30e40f0cd3",
+    "packages": [
+        {
+            "name": "kigkonsult/icalcreator",
+            "version": "v2.41.67",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/iCalcreator/iCalcreator.git",
+                "reference": "2236adc7ad8247e95d4e58ac0026bde755b262a7"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/iCalcreator/iCalcreator/zipball/2236adc7ad8247e95d4e58ac0026bde755b262a7",
+                "reference": "2236adc7ad8247e95d4e58ac0026bde755b262a7",
+                "shasum": ""
+            },
+            "require": {
+                "ext-intl": "*",
+                "ext-mbstring": "*",
+                "ext-openssl": "*",
+                "ext-simplexml": "*",
+                "ext-zlib": "*",
+                "php": ">=8.0"
+            },
+            "require-dev": {
+                "ext-xdebug": "*",
+                "phpcompatibility/php-compatibility": ">=9.3.5",
+                "phpstan/phpstan": ">=0.9.3",
+                "phpunit/phpunit": ">=6.5.13",
+                "squizlabs/php_codesniffer": ">=3.5.5"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "autoload.php"
+                ],
+                "psr-4": {
+                    "Kigkonsult\\Icalcreator\\": [
+                        "src/",
+                        "src/Util/",
+                        "src/Traits/"
+                    ]
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "LGPL-3.0-or-later"
+            ],
+            "authors": [
+                {
+                    "name": "Kjell-Inge Gustafsson",
+                    "email": "ical@kigkonsult.se"
+                }
+            ],
+            "description": "iCalcreator is the PHP implementation of rfc2445/rfc5545 and rfc updates, management of calendar information",
+            "keywords": [
+                "alarm",
+                "availability",
+                "calendar",
+                "daylight",
+                "event",
+                "ical",
+                "json",
+                "location",
+                "management",
+                "participant",
+                "resource",
+                "rfc2445",
+                "rfc5545",
+                "rfc5870",
+                "rfc6321",
+                "rfc6868",
+                "rfc7529",
+                "rfc7808",
+                "rfc7953",
+                "rfc7986",
+                "rfc9073",
+                "rfc9074",
+                "standard",
+                "todo",
+                "vCalendar",
+                "valarm",
+                "vevent",
+                "vfreebusy",
+                "vjournal",
+                "vtimezone",
+                "vtodo",
+                "xml"
+            ],
+            "support": {
+                "issues": "https://github.com/iCalcreator/iCalcreator/issues",
+                "source": "https://github.com/iCalcreator/iCalcreator/tree/v2.41.67"
+            },
+            "funding": [
+                {
+                    "url": "https://paypal.me/kigkonsult",
+                    "type": "other"
+                }
+            ],
+            "time": "2022-09-22T14:48:08+00:00"
+        },
+        {
+            "name": "sabre/uri",
+            "version": "2.3.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sabre-io/uri.git",
+                "reference": "eceb4a1b8b680b45e215574222d6ca00be541970"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sabre-io/uri/zipball/eceb4a1b8b680b45e215574222d6ca00be541970",
+                "reference": "eceb4a1b8b680b45e215574222d6ca00be541970",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.4 || ^8.0"
+            },
+            "require-dev": {
+                "friendsofphp/php-cs-fixer": "^3.9",
+                "phpstan/phpstan": "^1.8",
+                "phpunit/phpunit": "^9.0"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "lib/functions.php"
+                ],
+                "psr-4": {
+                    "Sabre\\Uri\\": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Evert Pot",
+                    "email": "me@evertpot.com",
+                    "homepage": "http://evertpot.com/",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Functions for making sense out of URIs.",
+            "homepage": "http://sabre.io/uri/",
+            "keywords": [
+                "rfc3986",
+                "uri",
+                "url"
+            ],
+            "support": {
+                "forum": "https://groups.google.com/group/sabredav-discuss",
+                "issues": "https://github.com/sabre-io/uri/issues",
+                "source": "https://github.com/fruux/sabre-uri"
+            },
+            "time": "2022-09-19T11:58:52+00:00"
+        },
+        {
+            "name": "sabre/vobject",
+            "version": "4.5.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sabre-io/vobject.git",
+                "reference": "d1fdc0c3587a314bdd3aac4a1e1dcacadd91858e"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sabre-io/vobject/zipball/d1fdc0c3587a314bdd3aac4a1e1dcacadd91858e",
+                "reference": "d1fdc0c3587a314bdd3aac4a1e1dcacadd91858e",
+                "shasum": ""
+            },
+            "require": {
+                "ext-mbstring": "*",
+                "php": "^7.1 || ^8.0",
+                "sabre/xml": "^2.1"
+            },
+            "require-dev": {
+                "friendsofphp/php-cs-fixer": "~2.17.1",
+                "phpstan/phpstan": "^0.12",
+                "phpunit/php-invoker": "^2.0 || ^3.1",
+                "phpunit/phpunit": "^7.5 || ^8.5 || ^9.0"
+            },
+            "suggest": {
+                "hoa/bench": "If you would like to run the benchmark scripts"
+            },
+            "bin": [
+                "bin/vobject",
+                "bin/generate_vcards"
+            ],
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "4.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Sabre\\VObject\\": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Evert Pot",
+                    "email": "me@evertpot.com",
+                    "homepage": "http://evertpot.com/",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Dominik Tobschall",
+                    "email": "dominik@fruux.com",
+                    "homepage": "http://tobschall.de/",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Ivan Enderlin",
+                    "email": "ivan.enderlin@hoa-project.net",
+                    "homepage": "http://mnt.io/",
+                    "role": "Developer"
+                }
+            ],
+            "description": "The VObject library for PHP allows you to easily parse and manipulate iCalendar and vCard objects",
+            "homepage": "http://sabre.io/vobject/",
+            "keywords": [
+                "availability",
+                "freebusy",
+                "iCalendar",
+                "ical",
+                "ics",
+                "jCal",
+                "jCard",
+                "recurrence",
+                "rfc2425",
+                "rfc2426",
+                "rfc2739",
+                "rfc4770",
+                "rfc5545",
+                "rfc5546",
+                "rfc6321",
+                "rfc6350",
+                "rfc6351",
+                "rfc6474",
+                "rfc6638",
+                "rfc6715",
+                "rfc6868",
+                "vCalendar",
+                "vCard",
+                "vcf",
+                "xCal",
+                "xCard"
+            ],
+            "support": {
+                "forum": "https://groups.google.com/group/sabredav-discuss",
+                "issues": "https://github.com/sabre-io/vobject/issues",
+                "source": "https://github.com/fruux/sabre-vobject"
+            },
+            "time": "2022-08-17T16:39:31+00:00"
+        },
+        {
+            "name": "sabre/xml",
+            "version": "2.2.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sabre-io/xml.git",
+                "reference": "a6af111850e7536d200d9637c34885cd3c77a86c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sabre-io/xml/zipball/a6af111850e7536d200d9637c34885cd3c77a86c",
+                "reference": "a6af111850e7536d200d9637c34885cd3c77a86c",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-xmlreader": "*",
+                "ext-xmlwriter": "*",
+                "lib-libxml": ">=2.6.20",
+                "php": "^7.1 || ^8.0",
+                "sabre/uri": ">=1.0,<3.0.0"
+            },
+            "require-dev": {
+                "friendsofphp/php-cs-fixer": "~2.17.1",
+                "phpstan/phpstan": "^0.12",
+                "phpunit/phpunit": "^7.5 || ^8.5 || ^9.0"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "lib/Deserializer/functions.php",
+                    "lib/Serializer/functions.php"
+                ],
+                "psr-4": {
+                    "Sabre\\Xml\\": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Evert Pot",
+                    "email": "me@evertpot.com",
+                    "homepage": "http://evertpot.com/",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Markus Staab",
+                    "email": "markus.staab@redaxo.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "sabre/xml is an XML library that you may not hate.",
+            "homepage": "https://sabre.io/xml/",
+            "keywords": [
+                "XMLReader",
+                "XMLWriter",
+                "dom",
+                "xml"
+            ],
+            "support": {
+                "forum": "https://groups.google.com/group/sabredav-discuss",
+                "issues": "https://github.com/sabre-io/xml/issues",
+                "source": "https://github.com/fruux/sabre-xml"
+            },
+            "time": "2021-11-04T06:37:27+00:00"
+        }
+    ],
+    "packages-dev": [],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": [],
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": {
+        "ext-curl": "*",
+        "ext-pdo": "*",
+        "ext-dom": "*",
+        "ext-libxml": "*"
+    },
+    "platform-dev": [],
+    "plugin-api-version": "2.3.0"
+}
--- a/config/config.php
+++ b/config/config.php
@@ -0,0 +1,31 @@
+<?php
+
+const AULAS = [
+    'C300 00.03' => 'C300 00.03 (Aula A)',
+    'C300 00.08' => 'C300 00.08 (Aula B)',
+    'C300 00.09' => 'C300 00.09 (Aula C)',
+    'C300 00.81' => 'C300 00.81 (Aula D)',
+    'C300 00.77' => 'C300 00.77 (Aula E)',
+    '200C 01.27' => '200C 01.27 (Aula A - Entrance QDV)',
+    '200C 01.17' => '200C 01.17 (Aula B - Entrance Bus)',
+    '200C 01.05' => '200C 01.05 (Aula C - Entrance QDV)',
+    '200C 01.06' => '200C 01.06 (Aula D - Entrance Bus)',
+    '200A 00.26' => '200A 00.26 (SOL N)',
+    '200A 00.25' => '200A 00.25 (SOL Z)',
+    '200A 00.225' => '200A 00.225 (Aula Erik Duval)',
+];
+
+function currentYear(): int
+{
+    return (date('m') < 9) ? (int)date('Y') - 1 : (int)date('Y');
+}
+
+function sources(): array {
+
+    $current = currentYear() - 2000;
+    $next = $current + 1;
+    return [
+        "https://people.cs.kuleuven.be/~btw/roosters$current$next/cws_semester_1.html",
+        "https://people.cs.kuleuven.be/~btw/roosters$current$next/cws_semester_2.html",
+    ];
+}
--- a/cron.php
+++ b/cron.php
@@ -0,0 +1,152 @@
+<?php
+
+require __DIR__.'/vendor/autoload.php';
+require __DIR__.'/config/config.php';
+
+
+info("Retrieving courses...");
+$urls = retrieve_courses();
+
+if (empty($urls)) {
+    error('Failed to retrieve courses');
+}
+
+info("Downloading ics files...");
+download_ics($urls);
+
+info("Updating database...");
+update_db($urls);
+
+function update_db(array $icsUrls)
+{
+    $db = new PDO("sqlite:".__DIR__."/roosters_new.db");
+    $db->exec(
+        "CREATE TABLE courses(id VARCHAR PRIMARY KEY, `file` VARCHAR, `course` VARCHAR, `opo` VARCHAR, `group` VARCHAR)"
+    );
+
+    $db->beginTransaction();
+
+    $stmt = $db->prepare("INSERT INTO courses (id, `file`,`course`,`opo`,`group`) VALUES(?,?,?,?,?)");
+
+    foreach ($icsUrls as $key => $item) {
+        $stmt->execute([substr(md5($key), 0, 8), $key, $item['course'], $item['opo'], $item['group']]);
+    }
+    $db->commit();
+    rename(__DIR__.'/roosters_new.db', __DIR__.'/roosters.db');
+}
+
+function download_ics(array $icsUrls)
+{
+    $cmh = curl_multi_init();
+    $file_pointers = [];
+    $curl_handles = [];
+
+    $key = -1;
+    foreach ($icsUrls as $id => $item) {
+        $key++;
+        $file = __DIR__.'/var/cache/'.$id;
+        $curl_handles[$key] = curl_init($item['url']);
+        $file_pointers[$key] = fopen($file, "w");
+        curl_setopt($curl_handles[$key], CURLOPT_FILE, $file_pointers[$key]);
+        curl_setopt($curl_handles[$key], CURLOPT_HEADER, 0);
+        curl_setopt($curl_handles[$key], CURLOPT_CONNECTTIMEOUT, 60);
+        curl_multi_add_handle($cmh, $curl_handles[$key]);
+    }
+
+    // Download the files
+    do {
+        $status = curl_multi_exec($cmh, $running);
+
+        if ($running) {
+            curl_multi_select($cmh);
+        }
+    } while ($running && $status == CURLM_OK);
+
+    // Free up objects
+    for ($i = 0, $iMax = count($curl_handles); $i < $iMax; $i++) {
+        curl_multi_remove_handle($cmh, $curl_handles[$i]);
+        curl_close($curl_handles[$i]);
+        fclose($file_pointers[$i]);
+    }
+
+    $err = curl_multi_errno($cmh);
+    if ($err != 0) {
+        error("curl error: $err");
+    }
+
+    curl_multi_close($cmh);
+}
+
+
+function retrieve_courses() :array
+{
+    $icsUrls = [];
+
+    foreach (sources() as $source) {
+        $base = get_base_url($source);
+
+        $xml = new DOMDocument();
+        libxml_use_internal_errors(true);
+        if (!$xml->loadHTMLFile($source)) {
+            error("Failed to parse html from source={$source}");
+        }
+
+        $icalDiv = $xml->getElementById('ical');
+        if ($icalDiv === null) {
+            error("Couldn't find #ical div, source={$source}");
+        }
+
+        /** @var DOMElement $item */
+        foreach ($icalDiv->getElementsByTagName('a') as $item) {
+            $course = $item->getAttribute('data-coursename');
+            $opo = $item->getAttribute('data-opo');
+            $group = $item->getAttribute('data-coursegroup');
+            $ics = $item->getAttribute('href');
+
+            if ($course === '' || $opo === '' || $ics === '') {
+                warn("Invalid course".PHP_EOL.print_r($item, true));
+                continue;
+            }
+            $icsUrls[basename($ics)] = [
+                'course' => $course,
+                'opo' => $opo,
+                'group' => $group,
+                'url' => $base.$ics,
+            ];
+        }
+    }
+
+    return $icsUrls;
+}
+
+function get_base_url(string $url) :string
+{
+    $rawPath = parse_url($url, PHP_URL_PATH);
+    if (substr($rawPath, -1) === '/') {
+        $path = $rawPath;
+    } else {
+        $path = dirname($rawPath).'/';
+    }
+
+    if ($path === "") {
+        $path = "/";
+    }
+
+    return parse_url($url, PHP_URL_SCHEME).'://'.parse_url($url, PHP_URL_HOST).$path;
+}
+
+function error(string $msg)
+{
+    echo sprintf("[ERRO] %s%s", $msg, PHP_EOL);
+    die(1);
+}
+
+function warn(string $msg)
+{
+    echo sprintf("[WARN] %s%s", $msg, PHP_EOL);
+}
+
+function info(string $msg)
+{
+    //echo sprintf("[INFO] %s%s", $msg, PHP_EOL);
+}
--- a/public/css/bootstrap-grid.css
+++ b/public/css/bootstrap-grid.css
--- a/public/css/bootstrap-grid.css.map
+++ b/public/css/bootstrap-grid.css.map
--- a/public/css/bootstrap-grid.min.css
+++ b/public/css/bootstrap-grid.min.css
--- a/public/css/bootstrap-grid.min.css.map
+++ b/public/css/bootstrap-grid.min.css.map
--- a/public/css/bootstrap-grid.rtl.css
+++ b/public/css/bootstrap-grid.rtl.css
--- a/public/css/bootstrap-grid.rtl.css.map
+++ b/public/css/bootstrap-grid.rtl.css.map
--- a/public/css/bootstrap-grid.rtl.min.css
+++ b/public/css/bootstrap-grid.rtl.min.css
--- a/public/css/bootstrap-grid.rtl.min.css.map
+++ b/public/css/bootstrap-grid.rtl.min.css.map
--- a/public/css/bootstrap-icons.css
+++ b/public/css/bootstrap-icons.css
--- a/public/css/bootstrap-reboot.css
+++ b/public/css/bootstrap-reboot.css
@@ -0,0 +1,488 @@
+/*!
+ * Bootstrap Reboot v5.2.0 (https://getbootstrap.com/)
+ * Copyright 2011-2022 The Bootstrap Authors
+ * Copyright 2011-2022 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
+ */
+:root {
+  --bs-blue: #0d6efd;
+  --bs-indigo: #6610f2;
+  --bs-purple: #6f42c1;
+  --bs-pink: #d63384;
+  --bs-red: #dc3545;
+  --bs-orange: #fd7e14;
+  --bs-yellow: #ffc107;
+  --bs-green: #198754;
+  --bs-teal: #20c997;
+  --bs-cyan: #0dcaf0;
+  --bs-black: #000;
+  --bs-white: #fff;
+  --bs-gray: #6c757d;
+  --bs-gray-dark: #343a40;
+  --bs-gray-100: #f8f9fa;
+  --bs-gray-200: #e9ecef;
+  --bs-gray-300: #dee2e6;
+  --bs-gray-400: #ced4da;
+  --bs-gray-500: #adb5bd;
+  --bs-gray-600: #6c757d;
+  --bs-gray-700: #495057;
+  --bs-gray-800: #343a40;
+  --bs-gray-900: #212529;
+  --bs-primary: #0d6efd;
+  --bs-secondary: #6c757d;
+  --bs-success: #198754;
+  --bs-info: #0dcaf0;
+  --bs-warning: #ffc107;
+  --bs-danger: #dc3545;
+  --bs-light: #f8f9fa;
+  --bs-dark: #212529;
+  --bs-primary-rgb: 13, 110, 253;
+  --bs-secondary-rgb: 108, 117, 125;
+  --bs-success-rgb: 25, 135, 84;
+  --bs-info-rgb: 13, 202, 240;
+  --bs-warning-rgb: 255, 193, 7;
+  --bs-danger-rgb: 220, 53, 69;
+  --bs-light-rgb: 248, 249, 250;
+  --bs-dark-rgb: 33, 37, 41;
+  --bs-white-rgb: 255, 255, 255;
+  --bs-black-rgb: 0, 0, 0;
+  --bs-body-color-rgb: 33, 37, 41;
+  --bs-body-bg-rgb: 255, 255, 255;
+  --bs-font-sans-serif: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
+  --bs-font-monospace: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
+  --bs-gradient: linear-gradient(180deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0));
+  --bs-body-font-family: var(--bs-font-sans-serif);
+  --bs-body-font-size: 1rem;
+  --bs-body-font-weight: 400;
+  --bs-body-line-height: 1.5;
+  --bs-body-color: #212529;
+  --bs-body-bg: #fff;
+  --bs-border-width: 1px;
+  --bs-border-style: solid;
+  --bs-border-color: #dee2e6;
+  --bs-border-color-translucent: rgba(0, 0, 0, 0.175);
+  --bs-border-radius: 0.375rem;
+  --bs-border-radius-sm: 0.25rem;
+  --bs-border-radius-lg: 0.5rem;
+  --bs-border-radius-xl: 1rem;
+  --bs-border-radius-2xl: 2rem;
+  --bs-border-radius-pill: 50rem;
+  --bs-link-color: #0d6efd;
+  --bs-link-hover-color: #0a58ca;
+  --bs-code-color: #d63384;
+  --bs-highlight-bg: #fff3cd;
+}
+
+*,
+*::before,
+*::after {
+  box-sizing: border-box;
+}
+
+@media (prefers-reduced-motion: no-preference) {
+  :root {
+    scroll-behavior: smooth;
+  }
+}
+
+body {
+  margin: 0;
+  font-family: var(--bs-body-font-family);
+  font-size: var(--bs-body-font-size);
+  font-weight: var(--bs-body-font-weight);
+  line-height: var(--bs-body-line-height);
+  color: var(--bs-body-color);
+  text-align: var(--bs-body-text-align);
+  background-color: var(--bs-body-bg);
+  -webkit-text-size-adjust: 100%;
+  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
+}
+
+hr {
+  margin: 1rem 0;
+  color: inherit;
+  border: 0;
+  border-top: 1px solid;
+  opacity: 0.25;
+}
+
+h6, h5, h4, h3, h2, h1 {
+  margin-top: 0;
+  margin-bottom: 0.5rem;
+  font-weight: 500;
+  line-height: 1.2;
+}
+
+h1 {
+  font-size: calc(1.375rem + 1.5vw);
+}
+@media (min-width: 1200px) {
+  h1 {
+    font-size: 2.5rem;
+  }
+}
+
+h2 {
+  font-size: calc(1.325rem + 0.9vw);
+}
+@media (min-width: 1200px) {
+  h2 {
+    font-size: 2rem;
+  }
+}
+
+h3 {
+  font-size: calc(1.3rem + 0.6vw);
+}
+@media (min-width: 1200px) {
+  h3 {
+    font-size: 1.75rem;
+  }
+}
+
+h4 {
+  font-size: calc(1.275rem + 0.3vw);
+}
+@media (min-width: 1200px) {
+  h4 {
+    font-size: 1.5rem;
+  }
+}
+
+h5 {
+  font-size: 1.25rem;
+}
+
+h6 {
+  font-size: 1rem;
+}
+
+p {
+  margin-top: 0;
+  margin-bottom: 1rem;
+}
+
+abbr[title] {
+  -webkit-text-decoration: underline dotted;
+  text-decoration: underline dotted;
+  cursor: help;
+  -webkit-text-decoration-skip-ink: none;
+  text-decoration-skip-ink: none;
+}
+
+address {
+  margin-bottom: 1rem;
+  font-style: normal;
+  line-height: inherit;
+}
+
+ol,
+ul {
+  padding-left: 2rem;
+}
+
+ol,
+ul,
+dl {
+  margin-top: 0;
+  margin-bottom: 1rem;
+}
+
+ol ol,
+ul ul,
+ol ul,
+ul ol {
+  margin-bottom: 0;
+}
+
+dt {
+  font-weight: 700;
+}
+
+dd {
+  margin-bottom: 0.5rem;
+  margin-left: 0;
+}
+
+blockquote {
+  margin: 0 0 1rem;
+}
+
+b,
+strong {
+  font-weight: bolder;
+}
+
+small {
+  font-size: 0.875em;
+}
+
+mark {
+  padding: 0.1875em;
+  background-color: var(--bs-highlight-bg);
+}
+
+sub,
+sup {
+  position: relative;
+  font-size: 0.75em;
+  line-height: 0;
+  vertical-align: baseline;
+}
+
+sub {
+  bottom: -0.25em;
+}
+
+sup {
+  top: -0.5em;
+}
+
+a {
+  color: var(--bs-link-color);
+  text-decoration: underline;
+}
+a:hover {
+  color: var(--bs-link-hover-color);
+}
+
+a:not([href]):not([class]), a:not([href]):not([class]):hover {
+  color: inherit;
+  text-decoration: none;
+}
+
+pre,
+code,
+kbd,
+samp {
+  font-family: var(--bs-font-monospace);
+  font-size: 1em;
+}
+
+pre {
+  display: block;
+  margin-top: 0;
+  margin-bottom: 1rem;
+  overflow: auto;
+  font-size: 0.875em;
+}
+pre code {
+  font-size: inherit;
+  color: inherit;
+  word-break: normal;
+}
+
+code {
+  font-size: 0.875em;
+  color: var(--bs-code-color);
+  word-wrap: break-word;
+}
+a > code {
+  color: inherit;
+}
+
+kbd {
+  padding: 0.1875rem 0.375rem;
+  font-size: 0.875em;
+  color: var(--bs-body-bg);
+  background-color: var(--bs-body-color);
+  border-radius: 0.25rem;
+}
+kbd kbd {
+  padding: 0;
+  font-size: 1em;
+}
+
+figure {
+  margin: 0 0 1rem;
+}
+
+img,
+svg {
+  vertical-align: middle;
+}
+
+table {
+  caption-side: bottom;
+  border-collapse: collapse;
+}
+
+caption {
+  padding-top: 0.5rem;
+  padding-bottom: 0.5rem;
+  color: #6c757d;
+  text-align: left;
+}
+
+th {
+  text-align: inherit;
+  text-align: -webkit-match-parent;
+}
+
+thead,
+tbody,
+tfoot,
+tr,
+td,
+th {
+  border-color: inherit;
+  border-style: solid;
+  border-width: 0;
+}
+
+label {
+  display: inline-block;
+}
+
+button {
+  border-radius: 0;
+}
+
+button:focus:not(:focus-visible) {
+  outline: 0;
+}
+
+input,
+button,
+select,
+optgroup,
+textarea {
+  margin: 0;
+  font-family: inherit;
+  font-size: inherit;
+  line-height: inherit;
+}
+
+button,
+select {
+  text-transform: none;
+}
+
+[role=button] {
+  cursor: pointer;
+}
+
+select {
+  word-wrap: normal;
+}
+select:disabled {
+  opacity: 1;
+}
+
+[list]:not([type=date]):not([type=datetime-local]):not([type=month]):not([type=week]):not([type=time])::-webkit-calendar-picker-indicator {
+  display: none !important;
+}
+
+button,
+[type=button],
+[type=reset],
+[type=submit] {
+  -webkit-appearance: button;
+}
+button:not(:disabled),
+[type=button]:not(:disabled),
+[type=reset]:not(:disabled),
+[type=submit]:not(:disabled) {
+  cursor: pointer;
+}
+
+::-moz-focus-inner {
+  padding: 0;
+  border-style: none;
+}
+
+textarea {
+  resize: vertical;
+}
+
+fieldset {
+  min-width: 0;
+  padding: 0;
+  margin: 0;
+  border: 0;
+}
+
+legend {
+  float: left;
+  width: 100%;
+  padding: 0;
+  margin-bottom: 0.5rem;
+  font-size: calc(1.275rem + 0.3vw);
+  line-height: inherit;
+}
+@media (min-width: 1200px) {
+  legend {
+    font-size: 1.5rem;
+  }
+}
+legend + * {
+  clear: left;
+}
+
+::-webkit-datetime-edit-fields-wrapper,
+::-webkit-datetime-edit-text,
+::-webkit-datetime-edit-minute,
+::-webkit-datetime-edit-hour-field,
+::-webkit-datetime-edit-day-field,
+::-webkit-datetime-edit-month-field,
+::-webkit-datetime-edit-year-field {
+  padding: 0;
+}
+
+::-webkit-inner-spin-button {
+  height: auto;
+}
+
+[type=search] {
+  outline-offset: -2px;
+  -webkit-appearance: textfield;
+}
+
+/* rtl:raw:
+[type="tel"],
+[type="url"],
+[type="email"],
+[type="number"] {
+  direction: ltr;
+}
+*/
+::-webkit-search-decoration {
+  -webkit-appearance: none;
+}
+
+::-webkit-color-swatch-wrapper {
+  padding: 0;
+}
+
+::-webkit-file-upload-button {
+  font: inherit;
+  -webkit-appearance: button;
+}
+
+::file-selector-button {
+  font: inherit;
+  -webkit-appearance: button;
+}
+
+output {
+  display: inline-block;
+}
+
+iframe {
+  border: 0;
+}
+
+summary {
+  display: list-item;
+  cursor: pointer;
+}
+
+progress {
+  vertical-align: baseline;
+}
+
+[hidden] {
+  display: none !important;
+}
+
+/*# sourceMappingURL=bootstrap-reboot.css.map */
--- a/public/css/bootstrap-reboot.css.map
+++ b/public/css/bootstrap-reboot.css.map
--- a/public/css/bootstrap-reboot.min.css
+++ b/public/css/bootstrap-reboot.min.css
--- a/public/css/bootstrap-reboot.min.css.map
+++ b/public/css/bootstrap-reboot.min.css.map
--- a/public/css/bootstrap-reboot.rtl.css
+++ b/public/css/bootstrap-reboot.rtl.css
@@ -0,0 +1,485 @@
+/*!
+ * Bootstrap Reboot v5.2.0 (https://getbootstrap.com/)
+ * Copyright 2011-2022 The Bootstrap Authors
+ * Copyright 2011-2022 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
+ */
+:root {
+  --bs-blue: #0d6efd;
+  --bs-indigo: #6610f2;
+  --bs-purple: #6f42c1;
+  --bs-pink: #d63384;
+  --bs-red: #dc3545;
+  --bs-orange: #fd7e14;
+  --bs-yellow: #ffc107;
+  --bs-green: #198754;
+  --bs-teal: #20c997;
+  --bs-cyan: #0dcaf0;
+  --bs-black: #000;
+  --bs-white: #fff;
+  --bs-gray: #6c757d;
+  --bs-gray-dark: #343a40;
+  --bs-gray-100: #f8f9fa;
+  --bs-gray-200: #e9ecef;
+  --bs-gray-300: #dee2e6;
+  --bs-gray-400: #ced4da;
+  --bs-gray-500: #adb5bd;
+  --bs-gray-600: #6c757d;
+  --bs-gray-700: #495057;
+  --bs-gray-800: #343a40;
+  --bs-gray-900: #212529;
+  --bs-primary: #0d6efd;
+  --bs-secondary: #6c757d;
+  --bs-success: #198754;
+  --bs-info: #0dcaf0;
+  --bs-warning: #ffc107;
+  --bs-danger: #dc3545;
+  --bs-light: #f8f9fa;
+  --bs-dark: #212529;
+  --bs-primary-rgb: 13, 110, 253;
+  --bs-secondary-rgb: 108, 117, 125;
+  --bs-success-rgb: 25, 135, 84;
+  --bs-info-rgb: 13, 202, 240;
+  --bs-warning-rgb: 255, 193, 7;
+  --bs-danger-rgb: 220, 53, 69;
+  --bs-light-rgb: 248, 249, 250;
+  --bs-dark-rgb: 33, 37, 41;
+  --bs-white-rgb: 255, 255, 255;
+  --bs-black-rgb: 0, 0, 0;
+  --bs-body-color-rgb: 33, 37, 41;
+  --bs-body-bg-rgb: 255, 255, 255;
+  --bs-font-sans-serif: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
+  --bs-font-monospace: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
+  --bs-gradient: linear-gradient(180deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0));
+  --bs-body-font-family: var(--bs-font-sans-serif);
+  --bs-body-font-size: 1rem;
+  --bs-body-font-weight: 400;
+  --bs-body-line-height: 1.5;
+  --bs-body-color: #212529;
+  --bs-body-bg: #fff;
+  --bs-border-width: 1px;
+  --bs-border-style: solid;
+  --bs-border-color: #dee2e6;
+  --bs-border-color-translucent: rgba(0, 0, 0, 0.175);
+  --bs-border-radius: 0.375rem;
+  --bs-border-radius-sm: 0.25rem;
+  --bs-border-radius-lg: 0.5rem;
+  --bs-border-radius-xl: 1rem;
+  --bs-border-radius-2xl: 2rem;
+  --bs-border-radius-pill: 50rem;
+  --bs-link-color: #0d6efd;
+  --bs-link-hover-color: #0a58ca;
+  --bs-code-color: #d63384;
+  --bs-highlight-bg: #fff3cd;
+}
+
+*,
+*::before,
+*::after {
+  box-sizing: border-box;
+}
+
+@media (prefers-reduced-motion: no-preference) {
+  :root {
+    scroll-behavior: smooth;
+  }
+}
+
+body {
+  margin: 0;
+  font-family: var(--bs-body-font-family);
+  font-size: var(--bs-body-font-size);
+  font-weight: var(--bs-body-font-weight);
+  line-height: var(--bs-body-line-height);
+  color: var(--bs-body-color);
+  text-align: var(--bs-body-text-align);
+  background-color: var(--bs-body-bg);
+  -webkit-text-size-adjust: 100%;
+  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
+}
+
+hr {
+  margin: 1rem 0;
+  color: inherit;
+  border: 0;
+  border-top: 1px solid;
+  opacity: 0.25;
+}
+
+h6, h5, h4, h3, h2, h1 {
+  margin-top: 0;
+  margin-bottom: 0.5rem;
+  font-weight: 500;
+  line-height: 1.2;
+}
+
+h1 {
+  font-size: calc(1.375rem + 1.5vw);
+}
+@media (min-width: 1200px) {
+  h1 {
+    font-size: 2.5rem;
+  }
+}
+
+h2 {
+  font-size: calc(1.325rem + 0.9vw);
+}
+@media (min-width: 1200px) {
+  h2 {
+    font-size: 2rem;
+  }
+}
+
+h3 {
+  font-size: calc(1.3rem + 0.6vw);
+}
+@media (min-width: 1200px) {
+  h3 {
+    font-size: 1.75rem;
+  }
+}
+
+h4 {
+  font-size: calc(1.275rem + 0.3vw);
+}
+@media (min-width: 1200px) {
+  h4 {
+    font-size: 1.5rem;
+  }
+}
+
+h5 {
+  font-size: 1.25rem;
+}
+
+h6 {
+  font-size: 1rem;
+}
+
+p {
+  margin-top: 0;
+  margin-bottom: 1rem;
+}
+
+abbr[title] {
+  -webkit-text-decoration: underline dotted;
+  text-decoration: underline dotted;
+  cursor: help;
+  -webkit-text-decoration-skip-ink: none;
+  text-decoration-skip-ink: none;
+}
+
+address {
+  margin-bottom: 1rem;
+  font-style: normal;
+  line-height: inherit;
+}
+
+ol,
+ul {
+  padding-right: 2rem;
+}
+
+ol,
+ul,
+dl {
+  margin-top: 0;
+  margin-bottom: 1rem;
+}
+
+ol ol,
+ul ul,
+ol ul,
+ul ol {
+  margin-bottom: 0;
+}
+
+dt {
+  font-weight: 700;
+}
+
+dd {
+  margin-bottom: 0.5rem;
+  margin-right: 0;
+}
+
+blockquote {
+  margin: 0 0 1rem;
+}
+
+b,
+strong {
+  font-weight: bolder;
+}
+
+small {
+  font-size: 0.875em;
+}
+
+mark {
+  padding: 0.1875em;
+  background-color: var(--bs-highlight-bg);
+}
+
+sub,
+sup {
+  position: relative;
+  font-size: 0.75em;
+  line-height: 0;
+  vertical-align: baseline;
+}
+
+sub {
+  bottom: -0.25em;
+}
+
+sup {
+  top: -0.5em;
+}
+
+a {
+  color: var(--bs-link-color);
+  text-decoration: underline;
+}
+a:hover {
+  color: var(--bs-link-hover-color);
+}
+
+a:not([href]):not([class]), a:not([href]):not([class]):hover {
+  color: inherit;
+  text-decoration: none;
+}
+
+pre,
+code,
+kbd,
+samp {
+  font-family: var(--bs-font-monospace);
+  font-size: 1em;
+}
+
+pre {
+  display: block;
+  margin-top: 0;
+  margin-bottom: 1rem;
+  overflow: auto;
+  font-size: 0.875em;
+}
+pre code {
+  font-size: inherit;
+  color: inherit;
+  word-break: normal;
+}
+
+code {
+  font-size: 0.875em;
+  color: var(--bs-code-color);
+  word-wrap: break-word;
+}
+a > code {
+  color: inherit;
+}
+
+kbd {
+  padding: 0.1875rem 0.375rem;
+  font-size: 0.875em;
+  color: var(--bs-body-bg);
+  background-color: var(--bs-body-color);
+  border-radius: 0.25rem;
+}
+kbd kbd {
+  padding: 0;
+  font-size: 1em;
+}
+
+figure {
+  margin: 0 0 1rem;
+}
+
+img,
+svg {
+  vertical-align: middle;
+}
+
+table {
+  caption-side: bottom;
+  border-collapse: collapse;
+}
+
+caption {
+  padding-top: 0.5rem;
+  padding-bottom: 0.5rem;
+  color: #6c757d;
+  text-align: right;
+}
+
+th {
+  text-align: inherit;
+  text-align: -webkit-match-parent;
+}
+
+thead,
+tbody,
+tfoot,
+tr,
+td,
+th {
+  border-color: inherit;
+  border-style: solid;
+  border-width: 0;
+}
+
+label {
+  display: inline-block;
+}
+
+button {
+  border-radius: 0;
+}
+
+button:focus:not(:focus-visible) {
+  outline: 0;
+}
+
+input,
+button,
+select,
+optgroup,
+textarea {
+  margin: 0;
+  font-family: inherit;
+  font-size: inherit;
+  line-height: inherit;
+}
+
+button,
+select {
+  text-transform: none;
+}
+
+[role=button] {
+  cursor: pointer;
+}
+
+select {
+  word-wrap: normal;
+}
+select:disabled {
+  opacity: 1;
+}
+
+[list]:not([type=date]):not([type=datetime-local]):not([type=month]):not([type=week]):not([type=time])::-webkit-calendar-picker-indicator {
+  display: none !important;
+}
+
+button,
+[type=button],
+[type=reset],
+[type=submit] {
+  -webkit-appearance: button;
+}
+button:not(:disabled),
+[type=button]:not(:disabled),
+[type=reset]:not(:disabled),
+[type=submit]:not(:disabled) {
+  cursor: pointer;
+}
+
+::-moz-focus-inner {
+  padding: 0;
+  border-style: none;
+}
+
+textarea {
+  resize: vertical;
+}
+
+fieldset {
+  min-width: 0;
+  padding: 0;
+  margin: 0;
+  border: 0;
+}
+
+legend {
+  float: right;
+  width: 100%;
+  padding: 0;
+  margin-bottom: 0.5rem;
+  font-size: calc(1.275rem + 0.3vw);
+  line-height: inherit;
+}
+@media (min-width: 1200px) {
+  legend {
+    font-size: 1.5rem;
+  }
+}
+legend + * {
+  clear: right;
+}
+
+::-webkit-datetime-edit-fields-wrapper,
+::-webkit-datetime-edit-text,
+::-webkit-datetime-edit-minute,
+::-webkit-datetime-edit-hour-field,
+::-webkit-datetime-edit-day-field,
+::-webkit-datetime-edit-month-field,
+::-webkit-datetime-edit-year-field {
+  padding: 0;
+}
+
+::-webkit-inner-spin-button {
+  height: auto;
+}
+
+[type=search] {
+  outline-offset: -2px;
+  -webkit-appearance: textfield;
+}
+
+[type="tel"],
+[type="url"],
+[type="email"],
+[type="number"] {
+  direction: ltr;
+}
+::-webkit-search-decoration {
+  -webkit-appearance: none;
+}
+
+::-webkit-color-swatch-wrapper {
+  padding: 0;
+}
+
+::-webkit-file-upload-button {
+  font: inherit;
+  -webkit-appearance: button;
+}
+
+::file-selector-button {
+  font: inherit;
+  -webkit-appearance: button;
+}
+
+output {
+  display: inline-block;
+}
+
+iframe {
+  border: 0;
+}
+
+summary {
+  display: list-item;
+  cursor: pointer;
+}
+
+progress {
+  vertical-align: baseline;
+}
+
+[hidden] {
+  display: none !important;
+}
+/*# sourceMappingURL=bootstrap-reboot.rtl.css.map */
--- a/public/css/bootstrap-reboot.rtl.css.map
+++ b/public/css/bootstrap-reboot.rtl.css.map
--- a/public/css/bootstrap-reboot.rtl.min.css
+++ b/public/css/bootstrap-reboot.rtl.min.css
--- a/public/css/bootstrap-reboot.rtl.min.css.map
+++ b/public/css/bootstrap-reboot.rtl.min.css.map
--- a/public/css/bootstrap-utilities.css
+++ b/public/css/bootstrap-utilities.css
--- a/public/css/bootstrap-utilities.css.map
+++ b/public/css/bootstrap-utilities.css.map
--- a/public/css/bootstrap-utilities.min.css
+++ b/public/css/bootstrap-utilities.min.css
--- a/public/css/bootstrap-utilities.min.css.map
+++ b/public/css/bootstrap-utilities.min.css.map
--- a/public/css/bootstrap-utilities.rtl.css
+++ b/public/css/bootstrap-utilities.rtl.css
--- a/public/css/bootstrap-utilities.rtl.css.map
+++ b/public/css/bootstrap-utilities.rtl.css.map
--- a/public/css/bootstrap-utilities.rtl.min.css
+++ b/public/css/bootstrap-utilities.rtl.min.css
--- a/public/css/bootstrap-utilities.rtl.min.css.map
+++ b/public/css/bootstrap-utilities.rtl.min.css.map
--- a/public/css/bootstrap.css
+++ b/public/css/bootstrap.css
--- a/public/css/bootstrap.css.map
+++ b/public/css/bootstrap.css.map
--- a/public/css/bootstrap.min.css
+++ b/public/css/bootstrap.min.css
--- a/public/css/bootstrap.min.css.map
+++ b/public/css/bootstrap.min.css.map
--- a/public/css/bootstrap.rtl.css
+++ b/public/css/bootstrap.rtl.css
--- a/public/css/bootstrap.rtl.css.map
+++ b/public/css/bootstrap.rtl.css.map
--- a/public/css/bootstrap.rtl.min.css
+++ b/public/css/bootstrap.rtl.min.css
--- a/public/css/bootstrap.rtl.min.css.map
+++ b/public/css/bootstrap.rtl.min.css.map
--- a/public/css/fonts/bootstrap-icons.woff
+++ b/public/css/fonts/bootstrap-icons.woff
--- a/public/css/fonts/bootstrap-icons.woff2
+++ b/public/css/fonts/bootstrap-icons.woff2
--- a/public/ical.php
+++ b/public/ical.php
@@ -0,0 +1,101 @@
+<?php
+
+require __DIR__.'/../vendor/autoload.php';
+require __DIR__.'/../config/config.php';
+
+use Sabre\VObject;
+
+function create_calendar($courses)
+{
+    $vcalendar = new VObject\Component\VCalendar();
+    $tz = $vcalendar->createComponent('VTIMEZONE', [
+        'TZID' => 'CET',
+    ]);
+    $standard = $vcalendar->createComponent('STANDARD', [
+        'DTSTART' => '16010101T030000',
+        'TZOFFSETFROM' => '+0200',
+        'TZOFFSETTO' => '+0100',
+        'RRULE' => 'FREQ=YEARLY;INTERVAL=1;BYDAY=-1SU;BYMONTH=10',
+    ]);
+    $daylight = $vcalendar->createComponent('DAYLIGHT', [
+        'DTSTART' => '16010101T020000',
+        'TZOFFSETFROM' => '+0100',
+        'TZOFFSETTO' => '+0200',
+        'RRULE' => 'FREQ=YEARLY;INTERVAL=1;BYDAY=-1SU;BYMONTH=3',
+    ]);
+
+    $tz->add($standard);
+    $tz->add($daylight);
+    $vcalendar->add($tz);
+
+    $db = new PDO("sqlite:".__DIR__."/../roosters.db");
+    $in = str_repeat('?,', count($courses) - 1).'?';
+    $stmt = $db->prepare("SELECT file FROM courses where id IN ($in)");
+    $stmt->execute($courses);
+    $files = $stmt->fetchAll(PDO::FETCH_COLUMN);
+
+
+    foreach ($files as $file) {
+        $uids = [];
+        $v = VObject\Reader::read(
+            fopen(__DIR__."/../var/cache/$file", 'r'),
+            VObject\Reader::OPTION_FORGIVING
+        );
+
+        /** @var VObject\Component\VEvent $event */
+        foreach ($v->VEVENT as $event) {
+            if (!in_array((string)$event->UID, $uids)) {
+                // Map location to aula
+                $location = (string)$event->LOCATION;
+                if (isset(AULAS[$location])) {
+                    $event->LOCATION = AULAS[$location];
+                }
+
+                $vcalendar->add($event);
+                $uids[] = $event->UID;
+            }
+        }
+    }
+
+    header('Content-Type: text/calendar; charset=utf-8');
+    header('Content-Disposition: attachment; filename="cw.ics"');
+    echo $vcalendar->serialize();
+}
+
+function create_url($courses)
+{
+    include __DIR__.'/../src/header.html';
+
+    sort($courses);
+    $courseStr = implode(":", $courses);
+    $id = substr(md5($courseStr), 0, 8);
+    $actual_link = (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ? "https" : "http")."://$_SERVER[HTTP_HOST]$_SERVER[SCRIPT_NAME]/".urlencode(
+            $id
+        );
+
+    $db = new PDO("sqlite:".__DIR__."/../short_links.db");
+    $stmt = $db->prepare("SELECT * FROM links WHERE id=?");
+    $stmt->execute([$id]);
+    $row = $stmt->fetch(PDO::FETCH_ASSOC);
+    if (!$row) {
+        $stmt = $db->prepare("INSERT INTO links (id, `courses`) VALUES(?,?)");
+        $stmt->execute([$id, $courseStr]);
+    }
+
+    echo '<h5>Use the following url to download the ical file or use it in Google Calendar:</h5>';
+    echo "<input type=\"text\" class=\"form-control\" placeholder=\"\" value='$actual_link'";
+    include __DIR__.'/../src/footer.html';
+}
+
+if (!empty($_GET['course'])) {
+    create_url($_GET['course']);
+} elseif ($_SERVER['PATH_INFO'] !== '') {
+    $id = urldecode(substr($_SERVER['PATH_INFO'], 1));
+
+    $db = new PDO("sqlite:".__DIR__."/../short_links.db");
+    $stmt = $db->prepare("SELECT * FROM links WHERE id=?");
+    $stmt->execute([$id]);
+    $row = $stmt->fetch(PDO::FETCH_ASSOC);
+
+    create_calendar(explode(':', urldecode($row["courses"])));
+}
--- a/public/index.php
+++ b/public/index.php
@@ -0,0 +1,83 @@
+<?php
+
+require __DIR__.'/../vendor/autoload.php';
+include __DIR__.'/../src/header.html';
+require __DIR__.'/../config/config.php';
+
+$db = new PDO("sqlite:".__DIR__."/../roosters.db");
+$stmt = $db->query("SELECT * FROM courses ORDER BY course");
+$courses = $stmt->fetchAll(PDO::FETCH_ASSOC);
+
+$s_courses = [];
+
+if (isset($_GET['courses']) && ctype_alnum($_GET['courses'])) {
+    $linkdb = new PDO("sqlite:".__DIR__."/../short_links.db");
+    $stmt = $linkdb->prepare("SELECT * FROM links WHERE id=?");
+    $stmt->execute([$_GET['courses']]);
+    $row = $stmt->fetch(PDO::FETCH_ASSOC);
+    if ($row) {
+        $s_courses = explode(':', $row['courses']);
+    }
+}
+
+$current = currentYear();
+$academicYear = "$current - ".($current + 1);
+
+echo <<<EOL
+<div class="bg-light p-5 mb-3 rounded">
+  <h1>CW Uurrooster generator</h1>
+  <p>Select your courses and submit. Copy the provided URL to your calendar.</p>
+  <div class="alert alert-info" role="alert">
+  <h4 class="alert-heading">Note:</h4>
+  <ul>
+  <li>Double courses are probably an entry for both semesters. Just select them both.</li>
+  <li>To add or remove courses, you have to recreate the calendar. For Google Calendar, this means removing the calendar, and adding it again.
+  <i>This cannot be changed without providing a unique id to every user of this app, which is too much work.</i></li>
+  <li>This works with every calendar with support for iCal. For Apple, just add a "subscription"</li>
+  <li>Do <b>NOT</b> import the ical file into your calendar. This won't update automatically, always use the provided url!</li>
+  <li>The calendar will automatically switch to the new academic year on 1 September. <i>Current year: $academicYear</i></li>
+  <li>Yell at me on discord if something is broken.</li>
+  </ul>
+  </div>
+  <div>
+  <form method="get">
+  <div class="row">
+    <label for="inputExisting" class="col-auto col-form-label">Import existing courses</label>
+    <div class="col-auto">
+      <input name="courses" type="text" class="form-control" placeholder="05108ed7" id="inputExisting">
+    </div>
+    <div class="col-auto">
+      <button type="submit" class="btn btn-primary">Submit</button>
+    </div>
+  </div>
+</form>
+  </div>
+</div>
+EOL;
+
+echo '<form action="ical.php" target="_blank" method="get">';
+echo '<div class="list-group">';
+
+foreach ($courses as $course) {
+    $checked = in_array($course['id'], $s_courses);
+
+    echo "<label class=\"list-group-item d-flex gap-2\">
+      <input class=\"form-check-input flex-shrink-0\" type=\"checkbox\" name=\"course[]\" value=\"{$course['id']}\"".($checked ? 'checked' : '').">
+      <span>
+        {$course['course']}
+        <span class=\"d-block text-muted\">
+            <a class='text-decoration-none' target='_blank' href=\"https://onderwijsaanbod.kuleuven.be/syllabi/n/{$course['opo']}N.htm\">
+                <span class=\"badge bg-secondary\"><i class=\"bi bi-link-45deg\"></i> {$course['opo']}</span>
+                
+            </a>
+            <span class=\"badge bg-info text-dark\">{$course['group']}</span>
+        </span>
+      </span>
+    </label>";
+}
+echo '</div>';
+
+echo '<button value="submit" type="submit" class="btn btn-primary mt-3">Submit</button>';
+echo '</form>';
+
+include __DIR__.'/../src/footer.html';
--- a/public/js/bootstrap.bundle.js
+++ b/public/js/bootstrap.bundle.js
--- a/public/js/bootstrap.bundle.js.map
+++ b/public/js/bootstrap.bundle.js.map
--- a/public/js/bootstrap.bundle.min.js
+++ b/public/js/bootstrap.bundle.min.js
--- a/public/js/bootstrap.bundle.min.js.map
+++ b/public/js/bootstrap.bundle.min.js.map
--- a/public/js/bootstrap.esm.js
+++ b/public/js/bootstrap.esm.js
--- a/public/js/bootstrap.esm.js.map
+++ b/public/js/bootstrap.esm.js.map
--- a/public/js/bootstrap.esm.min.js
+++ b/public/js/bootstrap.esm.min.js
--- a/public/js/bootstrap.esm.min.js.map
+++ b/public/js/bootstrap.esm.min.js.map
--- a/public/js/bootstrap.js
+++ b/public/js/bootstrap.js
--- a/public/js/bootstrap.js.map
+++ b/public/js/bootstrap.js.map
--- a/public/js/bootstrap.min.js
+++ b/public/js/bootstrap.min.js
--- a/public/js/bootstrap.min.js.map
+++ b/public/js/bootstrap.min.js.map
--- a/short_links.php
+++ b/short_links.php
@@ -0,0 +1,7 @@
+<?php
+
+@unlink(__DIR__.'short_links.db');
+$db = new PDO("sqlite:".__DIR__."/short_links.db");
+$db->exec(
+    "CREATE TABLE links(id VARCHAR PRIMARY KEY, `courses` VARCHAR)"
+);
--- a/src/footer.html
+++ b/src/footer.html
@@ -0,0 +1,7 @@
+</div>
+<footer class="py-3 my-4">
+    <p class="text-center text-muted mb-0">© 2022 Arthur Bols</p>
+    <p class="text-center text-muted mb-0">This is free and open source software, licensed under the AGPLv3+. <a href="https://git.principis.be/Principis/cw-uurrooster-generator">source</a></p>
+  </footer>
+</body>
+</html>
--- a/src/header.html
+++ b/src/header.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en" class="h-100">
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title>CW Uurrooster generator</title>
+
+    <!-- Bootstrap core CSS -->
+    <link href="css/bootstrap.min.css" rel="stylesheet">
+    <link rel="stylesheet" href="css/bootstrap-icons.css">
+</head>
+<body>
+<div class="container my-5">