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			410 lines
		
	
	
		
			12 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			410 lines
		
	
	
		
			12 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
| "use strict";
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| 
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| const log = require('./log');
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| const rp = require('request-promise');
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| const sql = require('./sql');
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| const options = require('./options');
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| const migration = require('./migration');
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| const utils = require('./utils');
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| const config = require('./config');
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| const SOURCE_ID = require('./source_id');
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| const audit_category = require('./audit_category');
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| const eventLog = require('./event_log');
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| const notes = require('./notes');
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| 
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| const SYNC_SERVER = config['Sync']['syncServerHost'];
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| const isSyncSetup = !!SYNC_SERVER;
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| 
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| 
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| let syncInProgress = false;
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| 
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| async function pullSync(syncContext) {
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|     const lastSyncedPull = parseInt(await options.getOption('last_synced_pull'));
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| 
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|     let syncRows;
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| 
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|     try {
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|         logSync("Pulling changes: " + SYNC_SERVER + '/api/sync/changed?lastSyncId=' + lastSyncedPull + "&sourceId=" + SOURCE_ID);
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| 
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|         syncRows = await rp({
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|             uri: SYNC_SERVER + '/api/sync/changed?lastSyncId=' + lastSyncedPull + "&sourceId=" + SOURCE_ID,
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|             jar: syncContext.cookieJar,
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|             json: true,
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|             timeout: 5 * 1000
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|         });
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| 
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|         logSync("Pulled " + syncRows.length + " changes");
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|     }
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|     catch (e) {
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|         logSyncError("Can't pull changes, inner exception: ", e);
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|     }
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| 
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|     for (const sync of syncRows) {
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|         let resp;
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| 
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|         try {
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|             resp = await rp({
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|                 uri: SYNC_SERVER + "/api/sync/" + sync.entity_name + "/" + sync.entity_id,
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|                 json: true,
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|                 jar: syncContext.cookieJar
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|             });
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|         }
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|         catch (e) {
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|             logSyncError("Can't pull " + sync.entity_name + " " + sync.entity_id, e);
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|         }
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| 
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|         if (sync.entity_name === 'notes') {
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|             await updateNote(resp.entity, resp.links, syncContext.sourceId);
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|         }
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|         else if (sync.entity_name === 'notes_tree') {
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|             await updateNoteTree(resp, syncContext.sourceId);
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|         }
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|         else if (sync.entity_name === 'notes_history') {
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|             await updateNoteHistory(resp, syncContext.sourceId);
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|         }
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|         else if (sync.entity_name === 'notes_reordering') {
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|             await updateNoteReordering(resp, syncContext.sourceId);
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|         }
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|         else if (sync.entity_name === 'options') {
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|             await updateOptions(resp, syncContext.sourceId);
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|         }
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|         else if (sync.entity_name === 'recent_notes') {
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|             await updateRecentNotes(resp, syncContext.sourceId);
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|         }
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|         else {
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|             logSyncError("Unrecognized entity type " + sync.entity_name, e);
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|         }
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| 
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|         await options.setOption('last_synced_pull', sync.id);
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|     }
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| 
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|     logSync("Finished pull");
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| }
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| 
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| async function sendEntity(entity, entityName, cookieJar) {
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|     try {
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|         const payload = {
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|             sourceId: SOURCE_ID,
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|             entity: entity
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|         };
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| 
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|         if (entityName === 'notes') {
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|             payload.links = await sql.getResults('select * from links where note_id = ?', [entity.note_id]);
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|         }
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| 
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|         await rp({
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|             method: 'PUT',
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|             uri: SYNC_SERVER + '/api/sync/' + entityName,
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|             body: payload,
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|             json: true,
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|             timeout: 5 * 1000,
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|             jar: cookieJar
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|         });
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|     }
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|     catch (e) {
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|         logSyncError("Failed sending update for entity " + entityName, e);
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|     }
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| }
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| 
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| async function readAndPushEntity(sync, syncContext) {
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|     let entity;
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| 
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|     if (sync.entity_name === 'notes') {
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|         entity = await sql.getSingleResult('SELECT * FROM notes WHERE note_id = ?', [sync.entity_id]);
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|     }
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|     else if (sync.entity_name === 'notes_tree') {
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|         entity = await sql.getSingleResult('SELECT * FROM notes_tree WHERE note_id = ?', [sync.entity_id]);
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|     }
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|     else if (sync.entity_name === 'notes_history') {
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|         entity = await sql.getSingleResult('SELECT * FROM notes_history WHERE note_history_id = ?', [sync.entity_id]);
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|     }
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|     else if (sync.entity_name === 'notes_reordering') {
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|         entity = {
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|             note_pid: sync.entity_id,
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|             ordering: await sql.getMap('SELECT note_id, note_pos FROM notes_tree WHERE note_pid = ?', [sync.entity_id])
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|         };
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|     }
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|     else if (sync.entity_name === 'options') {
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|         entity = await sql.getSingleResult('SELECT * FROM options WHERE opt_name = ?', [sync.entity_id]);
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|     }
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|     else if (sync.entity_name === 'recent_notes') {
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|         entity = await sql.getSingleResult('SELECT * FROM recent_notes WHERE note_id = ?', [sync.entity_id]);
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|     }
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|     else {
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|         logSyncError("Unrecognized entity type " + sync.entity_name, null);
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|     }
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| 
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|     if (!entity) {
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|         logSync("Sync entity for " + sync.entity_name + " " + sync.entity_id + " doesn't exist. Skipping.");
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|         return;
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|     }
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| 
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|     logSync("Pushing changes in " + sync.entity_name + " " + sync.entity_id);
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| 
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|     await sendEntity(entity, sync.entity_name, syncContext.cookieJar);
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| }
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| 
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| async function pushSync(syncContext) {
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|     let lastSyncedPush = parseInt(await options.getOption('last_synced_push'));
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| 
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|     while (true) {
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|         const sync = await sql.getSingleResultOrNull('SELECT * FROM sync WHERE id > ? LIMIT 1', [lastSyncedPush]);
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| 
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|         if (sync === null) {
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|             // nothing to sync
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| 
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|             logSync("Nothing to push");
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| 
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|             break;
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|         }
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| 
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|         if (sync.source_id === syncContext.sourceId) {
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|             logSync("Skipping sync " + sync.entity_name + " " + sync.entity_id + " because it originates from sync target");
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|         }
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|         else {
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|             await readAndPushEntity(sync, syncContext);
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|         }
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| 
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|         lastSyncedPush = sync.id;
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| 
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|         await options.setOption('last_synced_push', lastSyncedPush);
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|     }
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| }
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| 
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| async function login() {
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|     const timestamp = utils.nowTimestamp();
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| 
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|     const documentSecret = await options.getOption('document_secret');
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|     const hash = utils.hmac(documentSecret, timestamp);
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| 
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|     const cookieJar = rp.jar();
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| 
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|     try {
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|         const resp = await rp({
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|             method: 'POST',
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|             uri: SYNC_SERVER + '/api/login',
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|             body: {
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|                 timestamp: timestamp,
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|                 dbVersion: migration.APP_DB_VERSION,
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|                 hash: hash
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|             },
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|             json: true,
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|             timeout: 5 * 1000,
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|             jar: cookieJar
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|         });
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| 
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|         return {
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|             cookieJar: cookieJar,
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|             sourceId: resp.sourceId
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|         };
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|     }
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|     catch (e) {
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|         logSyncError("Can't login to API for sync, inner exception: ", e);
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|     }
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| }
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| 
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| async function sync() {
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|     if (syncInProgress) {
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|         logSyncError("Sync already in progress");
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| 
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|         return {
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|             success: false,
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|             message: "Sync already in progress"
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|         };
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|     }
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| 
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|     syncInProgress = true;
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| 
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|     try {
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|         if (!await migration.isDbUpToDate()) {
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|             logSyncError("DB not up to date");
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| 
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|             return {
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|                 success: false,
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|                 message: "DB not up to date"
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|             };
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|         }
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| 
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|         try {
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|             const syncContext = await login();
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|         }
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|         catch (e) {
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|             if (e.message.indexOf('ECONNREFUSED') !== -1) {
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|                 logSync("No connection to sync server.");
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| 
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|                 return {
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|                     success: false,
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|                     message: "No connection to sync server."
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|                 };
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|             }
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|             else {
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|                 throw e;
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|             }
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|         }
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| 
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|         await pushSync(syncContext);
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| 
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|         await pullSync(syncContext);
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| 
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|         await pushSync(syncContext);
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| 
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|         return {
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|             success: true
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|         };
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|     }
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|     catch (e) {
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|         logSync("sync failed: " + e.stack);
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| 
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|         return {
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|             success: false,
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|             message: e.message
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|         }
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|     }
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|     finally {
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|         syncInProgress = false;
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|     }
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| }
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| 
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| function logSync(message) {
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|     log.info(message);
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| }
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| 
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| function logSyncError(message, e) {
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|     let completeMessage = message;
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| 
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|     if (e) {
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|         completeMessage += ", inner exception: " + e.stack;
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|     }
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| 
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|     throw new Error(completeMessage);
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| }
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| 
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| async function updateNote(entity, links, sourceId) {
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|     const origNote = await sql.getSingleResult("select * from notes where note_id = ?", [entity.note_id]);
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| 
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|     if (!origNote || origNote.date_modified <= entity.date_modified) {
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|         await sql.doInTransaction(async () => {
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|             await sql.replace("notes", entity);
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| 
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|             await sql.remove("links", entity.note_id);
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| 
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|             for (const link of links) {
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|                 delete link['lnk_id'];
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| 
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|                 await sql.insert('link', link);
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|             }
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| 
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|             await sql.addNoteSync(entity.note_id, sourceId);
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|             await notes.addNoteAudits(origNote, entity, sourceId);
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|             await eventLog.addNoteEvent(entity.note_id, "Synced note <note>");
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|         });
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| 
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|         logSync("Update/sync note " + entity.note_id);
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|     }
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|     else {
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|         await eventLog.addNoteEvent(entity.note_id, "Sync conflict in note <note>");
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|     }
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| }
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| 
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| async function updateNoteTree(entity, sourceId) {
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|     const orig = await sql.getSingleResultOrNull("select * from notes_tree where note_id = ?", [entity.note_id]);
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| 
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|     if (orig === null || orig.date_modified < entity.date_modified) {
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|         await sql.doInTransaction(async () => {
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|             await sql.replace('notes_tree', entity);
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| 
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|             await sql.addNoteTreeSync(entity.note_id, sourceId);
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| 
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|             await sql.addAudit(audit_category.UPDATE_TITLE, sourceId, entity.note_id);
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|         });
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| 
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|         logSync("Update/sync note tree " + entity.note_id);
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|     }
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|     else {
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|         await eventLog.addNoteEvent(entity.note_id, "Sync conflict in note tree <note>");
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|     }
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| }
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| 
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| async function updateNoteHistory(entity, sourceId) {
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|     const orig = await sql.getSingleResultOrNull("select * from notes_history where note_history_id = ?", [entity.note_history_id]);
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| 
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|     if (orig === null || orig.date_modified_to < entity.date_modified_to) {
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|         await sql.doInTransaction(async () => {
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|             await sql.replace('notes_history', entity);
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| 
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|             await sql.addNoteHistorySync(entity.note_history_id, sourceId);
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|         });
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| 
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|         logSync("Update/sync note history " + entity.note_history_id);
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|     }
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|     else {
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|         await eventLog.addNoteEvent(entity.note_id, "Sync conflict in note history for <note>");
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|     }
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| }
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| 
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| async function updateNoteReordering(entity, sourceId) {
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|     await sql.doInTransaction(async () => {
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|         Object.keys(entity.ordering).forEach(async key => {
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|             await sql.execute("UPDATE notes_tree SET note_pos = ? WHERE note_id = ?", [entity.ordering[key], key]);
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|         });
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| 
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|         await sql.addNoteReorderingSync(entity.note_pid, sourceId);
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|         await sql.addAudit(audit_category.CHANGE_POSITION, sourceId, entity.note_pid);
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|     });
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| }
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| 
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| async function updateOptions(entity, sourceId) {
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|     if (!options.SYNCED_OPTIONS.includes(entity.opt_name)) {
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|         return;
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|     }
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| 
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|     const orig = await sql.getSingleResultOrNull("select * from options where opt_name = ?", [entity.opt_name]);
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| 
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|     if (orig === null || orig.date_modified < entity.date_modified) {
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|         await sql.doInTransaction(async () => {
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|             await sql.replace('options', entity);
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| 
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|             await sql.addOptionsSync(entity.opt_name, sourceId);
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|         });
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| 
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|         await eventLog.addEvent("Synced option " + entity.opt_name);
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|     }
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|     else {
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|         await eventLog.addEvent("Sync conflict in options for " + entity.opt_name);
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|     }
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| }
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| 
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| async function updateRecentNotes(entity, sourceId) {
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|     const orig = await sql.getSingleResultOrNull("select * from recent_notes where note_id = ?", [entity.note_id]);
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| 
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|     if (orig === null || orig.date_accessed < entity.date_accessed) {
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|         await sql.doInTransaction(async () => {
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|             await sql.replace('recent_notes', entity);
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| 
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|             await sql.addRecentNoteSync(entity.note_id, sourceId);
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|         });
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|     }
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| }
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| 
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| if (SYNC_SERVER) {
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|     log.info("Setting up sync");
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| 
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|     setInterval(sync, 60000);
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| 
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|     // kickoff initial sync immediately
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|     setTimeout(sync, 1000);
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| }
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| else {
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|     log.info("Sync server not configured, sync timer not running.")
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| }
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| 
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| module.exports = {
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|     sync,
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|     updateNote,
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|     updateNoteTree,
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|     updateNoteHistory,
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|     updateNoteReordering,
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|     updateOptions,
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|     updateRecentNotes,
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|     isSyncSetup
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| }; |