1 files changed, 49 insertions, 0 deletions
diff --git a/static/ts/components/changelog.ts b/static/ts/components/changelog.ts
new file mode 100644
index 00000000..d08f7cb3
--- /dev/null
+++ b/static/ts/components/changelog.ts
@@ -0,0 +1,49 @@
+import { makeElement } from '../lib'
+import { ComponentVEvent } from './vevent'
+import { VEvent } from '../vevent'
+
+export { VEventChangelog }
+
+class VEventChangelog extends ComponentVEvent {
+
+    readonly ul: HTMLElement
+
+    constructor(uid?: string) {
+        super(uid);
+
+        this.ul = makeElement('ul');
+    }
+
+    connectedCallback() {
+        this.replaceChildren(this.ul);
+    }
+
+    redraw(data: VEvent) {
+        /* TODO only redraw what is needed */
+        let children = []
+        for (let [_, el] of data.changelog) {
+            let msg = '';
+            switch (el.type) {
+                case 'property':
+                    msg += `change ${el.name}: `
+                    msg += `from "${el.from}" to "${el.to}"`
+                    break;
+                case 'calendar':
+                    if (el.from === null && el.to === null) {
+                        msg += '???'
+                    } else if (el.from === null) {
+                        msg += `set calendar to "${atob(el.to!)}"`
+                    } else if (el.to === null) {
+                        msg += `Remove calendar "${atob(el.from)}"`
+                    } else {
+                        msg += `Change calendar from "${atob(el.from)}" to "${atob(el.to)}"`
+                    }
+                    break;
+            }
+
+            children.push(makeElement('li', { textContent: msg }));
+        }
+
+        this.ul.replaceChildren(...children)
+    }
+}