Merge pull request #5997 from overleaf/em-track-changes-docstore-404

Skip inexistent docs when building ShareLaTeX history

GitOrigin-RevId: 5b7c5b77623d77c7d20f852050249211de0c8cb3

services/track-changes/app/js/DocstoreManager.js

@@ -1,6 +1,7 @@
 const request = require('request')
 const logger = require('logger-sharelatex')
 const Settings = require('@overleaf/settings')
+const Errors = require('./Errors')
 
 function peekDocument(projectId, docId, callback) {
   const url = `${Settings.apis.docstore.url}/project/${projectId}/doc/${docId}/peek`
@@ -15,8 +16,7 @@ function peekDocument(projectId, docId, callback) {
     if (res.statusCode >= 200 && res.statusCode < 300) {
       try {
         body = JSON.parse(body)
-      } catch (error1) {
-        error = error1
+      } catch (error) {
         return callback(error)
       }
       logger.log(
@@ -24,6 +24,10 @@ function peekDocument(projectId, docId, callback) {
         'got doc from docstore'
       )
       return callback(null, body.lines.join('\n'), body.version)
+    } else if (res.statusCode === 404) {
+      return callback(
+        new Errors.NotFoundError('doc not found', { projectId, docId })
+      )
     } else {
       return callback(
         new Error(

services/track-changes/app/js/Errors.js

@@ -0,0 +1,5 @@
+const OError = require('@overleaf/o-error')
+
+class NotFoundError extends OError {}
+
+module.exports = { NotFoundError }

services/track-changes/app/js/ZipManager.js

@@ -3,6 +3,7 @@ const UpdatesManager = require('./UpdatesManager')
 const DiffGenerator = require('./DiffGenerator')
 const DocumentUpdaterManager = require('./DocumentUpdaterManager')
 const DocstoreManager = require('./DocstoreManager')
+const Errors = require('./Errors')
 const PackManager = require('./PackManager')
 const yazl = require('yazl')
 const util = require('util')
@@ -47,11 +48,22 @@ async function rewindDoc(projectId, docId, zipfile) {
 
   const lastUpdateVersion = lastUpdate.v
 
-  const [latestContent, version] = await getLatestContent(
-    projectId,
-    docId,
-    lastUpdateVersion
-  )
+  let latestContent
+  let version
+  try {
+    ;[latestContent, version] = await getLatestContent(
+      projectId,
+      docId,
+      lastUpdateVersion
+    )
+  } catch (err) {
+    if (err instanceof Errors.NotFoundError) {
+      // Doc not found in docstore. We can't build its history
+      return null
+    } else {
+      throw err
+    }
+  }
 
   const id = docId.toString()