Save Mastodon URL as "statusUrl" on a posted note

.github/workflows/deploy.yml

@@ -144,15 +144,17 @@ jobs:
                   todo_file: ${{ env.MASTODON_TODO }}
                   log_file: ${{ env.MASTODON_LOG_FILE }}
 
-            - name: Commit and push posted notes
+            - name: Commit and push changed files
               # Pull first, since something could've been pushed in-between.
               run: |
                   git pull
                   git config user.name "Automated"
                   git config user.email "[email protected]"
-                  git add $log_file
+                  # The note that was posted now as an "url" in the frontmatter
+                  git add $log_file $dir
                   timestamp=$(date -u)
                   git commit -m "Latest post to Mastodon: $timestamp [skip-ci]" || exit 0
                   git push
               env:
                   log_file: ${{ env.MASTODON_LOG_FILE }}
+                  dir: ${{ env.NOTES_DIR }}

_syndicate.ts

@@ -1,4 +1,6 @@
 import { idOf, notePermalinkOf } from './src/_includes/permalinks.ts';
+import { extract } from 'std/front_matter/any.ts';
+import * as Yaml from 'std/yaml/mod.ts';
 
 export interface Todo {
     id: string;
@@ -61,6 +63,7 @@ export const postStatus = async (todo: Todo, accessToken: string, dryRun = false
     console.log('\n' + indent(`${statusBody}`, 3) + '\n');
 
     if (dryRun) {
+        await persistStatusUrl(todo, 'https://fake-url.com', true);
         return;
     }
 
@@ -78,13 +81,49 @@ export const postStatus = async (todo: Todo, accessToken: string, dryRun = false
         body: form,
     });
 
-    const json = await res.json();
+    interface Status {
+        id: string;
+        url: string;
+    }
+
+    interface Error {
+        error: string;
+    }
 
     if (!res.ok) {
-        throw new Error(`Posting failed with ${res.status}: ${json.error}`);
+        const err = await res.json() as Error;
+        throw new Error(`Posting failed with ${res.status}: ${err.error}`);
     }
 
+    const json = await res.json() as Status;
+
     console.log(`> Status posted to ${json.url}`);
+
+    await persistStatusUrl(todo, json.url);
+};
+
+export const persistStatusUrl = async (todo: Todo, url: string, dryRun = false) => {
+    const data = {
+        statusUrl: url,
+    };
+
+    const filePath = './src' + todo.sourcePath;
+
+    const post = await Deno.readTextFile(filePath);
+    const res = extract(post);
+    const newData = {
+        ...res.attrs,
+        ...data,
+    };
+
+    const content = `---\n${Yaml.stringify(newData)}---\n${res.body}`;
+
+    if (dryRun) {
+        console.log(`> Save to ${filePath}`);
+        console.log(content);
+    } else {
+        await Deno.writeTextFile(filePath, content);
+    }
 };
 
 const indent = (str: string, n: number) => {