Initial Mebbling hub implementation

worker/index.ts

@@ -0,0 +1,8 @@
+import { db } from "../lib/db"; import { decrypt } from "../lib/crypto"; import { createMemo, createRemoteFile, listMemos, setMemoAttachments } from "../lib/memos"; import { readFile } from "node:fs/promises"; import { join } from "node:path";
+type Source={id:number;user_id:number;base_url:string;token_encrypted:string};
+function upsertRemote(source:Source,m:any){const tags=JSON.stringify(m.tags||[]),attachments=JSON.stringify(m.attachments||m.resources||[]);db.prepare(`INSERT INTO posts(source_id,author_id,remote_memo_name,content,visibility,tags_json,attachments_json,origin,remote_created_at,remote_updated_at,sync_status,hidden) VALUES(?,?,?,?,?,?,?,?,?,?, 'synced',0) ON CONFLICT(source_id,remote_memo_name) DO UPDATE SET content=excluded.content,visibility=excluded.visibility,tags_json=excluded.tags_json,attachments_json=excluded.attachments_json,remote_updated_at=excluded.remote_updated_at,hidden=0,updated_at=CURRENT_TIMESTAMP`).run(source.id,source.user_id,m.name,m.content,m.visibility,tags,attachments,'memos',m.createTime||null,m.updateTime||null);}
+async function pull(source:Source){const memos=await listMemos(source.base_url,decrypt(source.token_encrypted));for(const memo of memos)upsertRemote(source,memo);const names=memos.map(m=>m.name);if(names.length){const placeholders=names.map(()=>'?').join(',');db.prepare(`UPDATE posts SET hidden=1,updated_at=CURRENT_TIMESTAMP WHERE source_id=? AND remote_memo_name IS NOT NULL AND remote_memo_name NOT IN (${placeholders})`).run(source.id,...names);}else{db.prepare("UPDATE posts SET hidden=1,updated_at=CURRENT_TIMESTAMP WHERE source_id=? AND remote_memo_name IS NOT NULL").run(source.id);}db.prepare("UPDATE sources SET sync_status='synced',last_synced_at=CURRENT_TIMESTAMP,last_error=NULL WHERE id=?").run(source.id);}
+async function push(source:Source,payload:any){const post=db.prepare('SELECT * FROM posts WHERE id=? AND source_id=?').get(payload.postId,source.id) as any;if(!post)return;const token=decrypt(source.token_encrypted);const localAttachments=JSON.parse(post.attachments_json||'[]') as {name:string;url:string;type:string;size:number}[];const attachments=[] as unknown[],resources=[] as unknown[];for(const attachment of localAttachments){const content=(await readFile(join(process.cwd(),'public',attachment.url))).toString('base64');const remote=await createRemoteFile(source.base_url,token,{filename:attachment.name,content,type:attachment.type||'application/octet-stream',size:String(attachment.size)});(remote.kind==='attachment'?attachments:resources).push(remote.value);}const memo=await createMemo(source.base_url,token,{content:post.content,visibility:post.visibility,resources});if(attachments.length)await setMemoAttachments(source.base_url,token,memo.name,attachments);db.prepare("UPDATE posts SET remote_memo_name=?,remote_created_at=?,remote_updated_at=?,sync_status='synced',updated_at=CURRENT_TIMESTAMP WHERE id=?").run(memo.name,memo.createTime||null,memo.updateTime||null,post.id);}
+async function run(){const job=db.prepare("SELECT * FROM sync_jobs WHERE status='queued' AND run_after<=CURRENT_TIMESTAMP ORDER BY id LIMIT 1").get() as any;if(!job)return;db.prepare("UPDATE sync_jobs SET status='running',attempts=attempts+1 WHERE id=?").run(job.id);const source=db.prepare('SELECT * FROM sources WHERE id=?').get(job.source_id) as Source;try{if(job.kind==='pull')await pull(source);else if(job.kind==='push')await push(source,JSON.parse(job.payload_json||'{}'));db.prepare("UPDATE sync_jobs SET status='done' WHERE id=?").run(job.id);db.prepare("UPDATE sources SET sync_status='synced',last_error=NULL,last_synced_at=CURRENT_TIMESTAMP WHERE id=?").run(source.id);}catch(error){const message=error instanceof Error?error.message:'Sync failure';db.prepare("UPDATE sync_jobs SET status=CASE WHEN attempts>=5 THEN 'failed' ELSE 'queued' END,last_error=?,run_after=datetime('now','+5 minutes') WHERE id=?").run(message,job.id);db.prepare("UPDATE sources SET sync_status='error',last_error=? WHERE id=?").run(message,source.id);}}
+function schedule(){const interval=Number(process.env.SYNC_INTERVAL_MINUTES||60);db.prepare("INSERT INTO sync_jobs(source_id,kind) SELECT id,'pull' FROM sources WHERE COALESCE(last_synced_at,'1970-01-01') < datetime('now', ?) AND NOT EXISTS (SELECT 1 FROM sync_jobs j WHERE j.source_id=sources.id AND j.kind='pull' AND j.status IN ('queued','running'))").run(`-${interval} minutes`);}
+setInterval(()=>{schedule();void run();},5000);schedule();void run();