most of the initial structure and content

static/dbkcalendar.js

@@ -1,65 +1,85 @@
 /*
 	Include calendar | Chaostreff Backnang | @paddy
+  Modernization by @kleinesfilmroellchen
 */
 
 export default function hackcal(e, p = 1) {
-  //   var cal_uri = "https://chaostreff-backnang.de/hackcal/?period=" + p;
-  var cal_uri = "/hackcal";
-  var uri_regex =
-    /(https?:\/\/([-\w\.]+)+(:\d+)?(\/([\w\/\-_\.\:]*(\?\S+)?)?)?)/gi;
+  if (!document.getElementById("dbkcalendar")) return;
 
-  fetch(cal_uri)
+  const calendar = document.getElementById("calendar").content.cloneNode(true);
+  const calendarDate = document.getElementById("calendar-date");
+  const calendarEntry = document.getElementById("calendar-entry");
+
+  const calendarParent = document.getElementById("dbkcalendar");
+  const body = calendar.querySelector("tbody");
+
+  // const cal_uri = "https://chaostreff-backnang.de/hackcal/?period=" + p;
+  const calUri = "/hackcal";
+  fetch(calUri)
     .then((res) => res.json())
     .then((data) => {
-      var items = [];
+      const items = [];
       Object.keys(data).forEach(function (date) {
-        var day = new Date(date);
-        items.push(
-          "<tr class='' data-date='" +
-            date +
-            "'><span>" +
-            day.toLocaleDateString(true, {
-              weekday: "short",
-              day: "numeric",
-              month: "long",
-              year: "numeric",
-            }) +
-            "</span></tr>"
-        );
+        const day = new Date(date);
+
+        const dateItem = calendarDate.content.cloneNode(true);
+        const timeElement = dateItem.querySelector("time");
+        timeElement.innerText = day.toLocaleDateString(true, {
+          weekday: "short",
+          day: "numeric",
+          month: "long",
+          year: "numeric",
+        });
+        timeElement.dateTime = date;
+        body.appendChild(dateItem);
+
         Object.keys(data[date]).forEach(function (uid) {
-          var event = data[date][uid];
-          var location = event.location
-            ? event.location
-                .replace(/\n/g, "<br>")
-                .replace(uri_regex, "<a href='$1' target='_blank'>$1</a>")
-            : "";
-          var description = event.description
-            ? event.description
-                .replace(/\n/g, "<br>")
-                .replace(uri_regex, (url) => {
-                  event.summary = `<a href='${url}' target='_blank'>${event.summary}</a>`;
-                  return "";
-                })
-            : "";
-          var categories = event.categories
-            ? "<i>" + event.categories.replace(",", "</i> <i>") + "</i>"
-            : "";
-          items.push(
-            "<tr data-uid='" +
-              uid +
-              "'><span>" +
-              event.datestr +
-              "</span><span><b>" +
-              event.summary +
-              "</b> | " +
-              location +
-              "<br/>" +
-              description +
-              categories +
-              "</span></tr>"
-          );
+          const event = data[date][uid];
+
+          const entryItem = calendarEntry.content.cloneNode(true);
+          entryItem.querySelector(".calendar-entry").dataset.uid = uid;
+          entryItem.querySelector(".time").innerText = event.datestr;
+
+          // use description as link on summary if it's a valid URL
+          const summaryItem = entryItem.querySelector(".summary");
+          try {
+            const descriptionUri = new URL(event.description);
+            const descriptionLink = document.createElement("a");
+            descriptionLink.href = descriptionUri;
+            descriptionLink.target = "_blank";
+            descriptionLink.innerText = event.summary;
+            summaryItem.appendChild(descriptionLink);
+          } catch (e) {
+            summaryItem.innerText = event.summary;
+            entryItem.querySelector(".description").innerText =
+              event.description;
+          }
+
+          // self-link location if it's a valid URL
+          const locationItem = entryItem.querySelector(".location");
+          try {
+            const locationUri = new URL(event.location);
+            const locationLink = document.createElement("a");
+            locationLink.href = locationUri;
+            locationLink.target = "_blank";
+            locationLink.innerText = event.location;
+            locationItem.appendChild(locationLink);
+          } catch (e) {
+            locationItem.innerText = event.location;
+          }
+
+          const categoriesParent = entryItem.querySelector(".categories");
+          for (const category of event.categories.split(",")) {
+            const categoryItem = document.createElement("em");
+            categoryItem.innerText = category;
+            categoriesParent.appendChild(categoryItem);
+          }
+
+          body.appendChild(entryItem);
         });
       });
-      document.querySelector("#dbkcalendar").innerHTML = items.join("");
+
+      calendarParent.innerHTML = "";
+      calendarParent.appendChild(calendar);
     });
 }

static/main.css

@@ -1,3 +1,5 @@
+/* general page styling */
+
 :root {
   --main-bg-color: #020404;
   --main-text-color: #efe3e3;
@@ -42,13 +44,31 @@ code {
 
 img {
   display: block;
+
+  &.small {
+    max-height: 10em;
+    width: auto;
+  }
 }
 
+h1 {
+  font-weight: 700;
+  font-size: 1.8rem;
+  margin-bottom: 0.5em;
+  color: var(--main-accent-color);
+}
+h2 {
+  font-size: 1.5rem;
+}
+h3 {
+  font-size: 1.2rem;
+}
+
+/* page header */
+
 #space-image {
   height: 12vh;
-  transition:
-    height 0.2s,
-    transform 0.2s;
+  transition: height 0.2s, transform 0.2s;
 
   &:hover {
     height: 14vh;
@@ -105,9 +125,7 @@ nav {
     margin-bottom: 0.4em;
     text-transform: uppercase;
     text-decoration: underline 0.15em var(--main-text-color);
-    transition:
-      text-decoration-color 0.3s,
-      color 0.25s;
+    transition: text-decoration-color 0.3s, color 0.25s;
 
     &:focus,
     &:hover {
@@ -117,6 +135,8 @@ nav {
   }
 }
 
+/* main grid */
+
 main {
   display: grid;
   grid-template: ". content ." auto / 1fr minmax(min-content, 45rem) 1fr;
@@ -132,12 +152,6 @@ main {
   }
 }
 
-h1 {
-  font-weight: 700;
-  margin-bottom: 0.5em;
-  color: var(--main-accent-color);
-}
-
 footer {
   background-color: var(--main-bg-color);
   text-align: center;
@@ -153,3 +167,50 @@ footer {
   );
   border-image-slice: 1;
 }
+
+/* calendar */
+
+#dbkcalendar {
+  * {
+    border-radius: 0.25em;
+  }
+
+  .calendar-date th {
+    padding: 0.5em 1em;
+    background: oklch(40% 0 0);
+  }
+  td {
+    padding: 1em;
+  }
+  p {
+    margin: 0;
+    max-height: min-content;
+
+    &.categories {
+      margin-top: 0.2em;
+
+      em {
+        background-color: var(--main-accent-color);
+        padding: 0 0.25em;
+        font-style: normal;
+        font-weight: bold;
+        color: var(--main-bg-color);
+      }
+    }
+  }
+}
+
+em.summary {
+  font-style: normal;
+  font-weight: bold;
+}
+
+table {
+  border-spacing: 0;
+  border-collapse: collapse;
+
+  * {
+    text-align: left;
+    vertical-align: top;
+  }
+}

static/main.js

@@ -16,10 +16,20 @@ function checkSpace() {
         icon.src = data.state.icon.closed;
       }
       icon.alt = "Der Space ist " + openText;
+      const lastchangeString = data.state.lastchange
+        ? new Date(data.state.lastchange * 1000).toLocaleString(true, {
+            timeStyle: "short",
+            dateStyle: "medium",
+          })
+        : "unbekannt";
+      icon.title = "Letzte Statusänderung: " + lastchangeString;
       console.log("Icon: " + icon.src);
     })
     .catch((error) => {
-      console.error(error);
+      icon.src = "/img/unknown.png";
+      icon.alt = "Der Spacestatus ist unbekannt";
+      icon.title = "";
+      console.error("Error on space state retrieval:", error);
     });
 }