Added script to fix linked markdown images mangled by URL transforms

refs TryGhost/Product#596

- fetch all posts and pages from the API
- check mobiledoc for existence of linked images
- fix any linked images that have mangled markup
- fix any URLs that weren't correctly transformed from relative to absolute (stored with `__GHOST_URL__` internally)

fix-markdown-linked-images.js

@@ -0,0 +1,94 @@
+/**
+ * Finds and fixes any mangled
+ *
+ * Usage:
+ *
+ * node fix-markdown-linked-images.js https://blah.ghost.io ADMIN_API_KEY - dry run
+ * node fix-markdown-linked-images.js https://blah.ghost.io ADMIN_API_KEY true - live run
+ */
+
+if (process.argv.length < 4) {
+    console.log('not enough arguments, provide an API url and admin key');
+    process.exit(1);
+}
+
+const Promise = require('bluebird');
+const GhostAdminAPI = require('@tryghost/admin-api');
+
+const url = process.argv[2];
+const key = process.argv[3];
+
+(async function main() {
+    const doEdit = process.argv[4] === 'true';
+
+    if (doEdit) {
+        console.log('REAL Run');
+    } else {
+        console.log('Dry Run - nothing will be edited');
+    }
+
+    // Give the user time to read...
+    await Promise.delay(1000);
+
+    const api = new GhostAdminAPI({
+        url,
+        key,
+        version: 'canary'
+    });
+
+    try {
+        const site = await api.site.read();
+        const allPosts = await api.posts.browse({fields: 'id,slug,mobiledoc,updated_at', limit: 'all'});
+        const allPages = await api.pages.browse({fields: 'id,slug,mobiledoc,updated_at', limit: 'all'});
+
+        console.log(`${allPosts.length} Posts and ${allPages.length} Pages will be checked for mangled markdown and edited if needed`);
+        // give time to cancel if needed
+        await Promise.delay(2000);
+
+        const postsResult = await Promise.mapSeries(allPosts, async (post) => {
+            let edited = false;
+
+            function hasLocal(str) {
+                return str.indexOf(site.url) > -1 || str.match(/\/content\/images\//);
+            }
+
+            let mobiledoc = post.mobiledoc;
+            mobiledoc = mobiledoc.replace(/\[!\[(.*?)\]\((.*?)\)\]\((.*?)\)/gm, (match, p1, p2, p3) => {
+                if (!hasLocal(p1) && !hasLocal(p2) && !hasLocal(p3)) {
+                    return match;
+                }
+
+                edited = true;
+                console.log(`Found post with potential problem ${post.slug} (${post.id})`);
+                console.log({match, p1, p2, p3});
+                return match;
+            });
+
+            if (doEdit && edited) {
+                // missing data attributes won't be changed
+                // updated_at is required to pass collision detection
+                const postData = {id: post.id, updated_at: post.updated_at, mobiledoc};
+                await api.posts.edit(postData);
+            }
+
+            return Promise.delay(0).return(edited);
+        });
+
+        console.log(`\nChecked ${postsResult.length} posts and fixed ${postsResult.filter(edited => edited).length}\n`);
+        // await Promise.delay(1000);
+
+        // const pagesResult = await Promise.mapSeries(allPages, async (page) => {
+        //     console.log(`Re-rendering page ${page.slug} (${page.id})`);
+
+        //     const pageData = {id: page.id, updated_at: page.updated_at};
+        //     await api.pages.edit(pageData, {force_rerender: true});
+
+        //     return Promise.delay(50).return(true);
+        // });
+
+        // console.log(`\nRe-rendered ${pagesResult.length} pages`);
+    } catch (err) {
+        console.error('There was an error', require('util').inspect(err, false, null));
+        process.exit(1);
+    }
+})();