Made first version work

write.ts

@@ -0,0 +1,52 @@
+import { VideoDescription } from "./main.ts";
+
+export function singleVideoDescription(video: VideoDescription): string {
+    const teachersList = video.teachers.map(v => "[[" + v + "]]").join(" & ");
+
+    return `=== ${video.title} ===
+Date:{{#time: Y-m-d (D) | ${video.date}}}<br>
+Teachers: ${teachersList}<br>
+Level: ${video.level}
+
+[[${video.path}|left|400px|thumb|${video.title}]]
+
+==== Shown Patterns ====
+${video.patterns}
+
+==== Notes ====
+${video.notes}`;
+}
+
+export function writeSection(events: VideoDescription[][]): string {
+    return events.map(v => {
+        const token = v[0]
+        const event_name = token.event === token.location ? token.event : token.event + " " + token.location
+
+        // FIXME: This will break with videos in 75 years
+        const event_date = event_name.match(/\d{2}|20\d{2}/) ? "" : new Date(token.date).getFullYear().toString()
+
+        let r = `== ${event_name} ${event_date} ==\n`
+        r += `${v.length} Videos\n`
+        r += v.map(video => singleVideoDescription(video)).join("\n\n")
+        return r
+    }).join("\n\n\n")
+}
+
+export function bucketEvents(events: VideoDescription[]): VideoDescription[][] {
+    const buckets: Record<string, VideoDescription[]> = {}
+    for (const e of events) {
+        const tag = e.event + e.location + new Date(e.date).getFullYear().toString()
+        if (tag in buckets) {
+            buckets[tag].push(e)
+        } else {
+            buckets[tag] = [e]
+        }
+    }
+
+    Object.values(buckets)
+        .forEach(b =>
+            b.sort((a, b) =>
+                new Date(b.date).getTime() - new Date(a.date).getTime()))
+
+    return Object.values(buckets)
+}