Initial commit

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 */

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 */

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"])));
+}

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';