Worked on parsing

parse.ts

@@ -0,0 +1,67 @@
+import { VideoDescription } from "./main.ts";
+
+export function parseTemplate(description: string): Record<string, string> {
+
+    const templateRegex = /{{(.*DanceWorkshopDescription.*)}}/s;
+
+    const match = description.match(templateRegex);
+
+    if (!match) {
+        throw new Error("Could not find template")
+    }
+
+    const propertyRegex = /\|\s*(?<key>[^|]*?)\s*=(?<value>[^|]*?)\s*$/gm
+
+    const properties = match[1].matchAll(propertyRegex).map(v => {
+        if (!v.groups) { throw new Error("Faulty regex") };
+        return ({ [v.groups['key']]: v.groups['value'] })
+    })
+    return Object.assign({}, ...Array.from(properties))
+}
+
+export function parseSummary(description: string, name: string): VideoDescription {
+    const properties = parseTemplate(description)
+
+    const b: Partial<VideoDescription> = {};
+
+    if (Object.hasOwn(properties, 'teachers')) {
+        console.warn(`Page ${name} has old template usage [contains 'teachers' key]`)
+        const t = properties['teachers'].split('&').map(item => item.trim());
+        b.teachers = t
+    } else {
+        b.teachers = [properties['leader'], properties['follower']].filter(v => v !== undefined)
+    }
+
+    b.location = properties['location']
+    b.date = properties['date']
+    b.level = properties['level']
+
+    b.event = properties['event'] || b.location
+
+    if (!Object.hasOwn(properties, 'patterns')) {
+        console.warn(`Page ${name} has old template usage [no 'patterns' key]`)
+        const patternsRegex = /===\s*Shown Patterns\s*===\s*(?<patterns>(^\s*[:*]+.*$\s+)+)/m
+        const match = description.match(patternsRegex)
+        if (!match) {
+            throw new Error("Could not find \"Shown Patterns\"")
+        }
+        if (!match.groups) {
+            throw new Error("Faulty regex")
+        }
+        b.patterns = match.groups['patterns']
+    }
+    if (!Object.hasOwn(properties, 'notes')) {
+        console.warn(`Page ${name} has old template usage [no 'notes' key]`)
+        const notesRegex = /===\s*Notes\s*===\s*(?<notes>(^\s*[:*]+.*$\s+)+)/m
+        const match = description.match(notesRegex)
+        if (!match) {
+            throw new Error("Could not find \"Notes\"")
+        }
+        if (!match.groups) {
+            throw new Error("Faulty regex")
+        }
+        b.notes = match.groups['notes']
+    }
+
+    return (b as VideoDescription)
+}