PLT-3105 Files table migration (#4068)

* Implemented initial changes for files table

* Removed *_benchmark_test.go files

* Re-implemented GetPublicFile and added support for old path

* Localization for files table

* Moved file system code into utils package

* Finished server-side changes and added initial upgrade script

* Added getPostFiles api

* Re-add Extension and HasPreviewImage fields to FileInfo

* Removed unused translation

* Fixed merge conflicts left over after permissions changes

* Forced FileInfo.extension to be lower case

* Changed FileUploadResponse to contain the FileInfos instead of FileIds

* Fixed permissions on getFile* calls

* Fixed notifications for file uploads

* Added initial version of client code for files changes

* Permanently added FileIds field to Post object and removed Post.HasFiles

* Updated PostStore.Update to be usable in more circumstances

* Re-added Filenames field and switched file migration to be entirely lazy-loaded

* Increased max listener count for FileStore

* Removed unused fileInfoCache

* Moved file system code back into api

* Removed duplicate test case

* Fixed unit test running on ports other than 8065

* Renamed HasPermissionToPostContext to HasPermissionToChannelByPostContext

* Refactored handleImages to make it more easily understandable

* Renamed getPostFiles to getFileInfosForPost

* Re-added pre-FileIds posts to analytics

* Changed files to be saved as their ids as opposed to id/filename.ext

* Renamed FileInfo.UserId to FileInfo.CreatorId

* Fixed detection of language in CodePreview

* Fixed switching between threads in the RHS not loading new files

* Add serverside protection against a rare bug where the client sends the same file twice for a single post

* Refactored the important parts of uploadFile api call into a function that can be called without a web context

1 files changed, 53 insertions, 18 deletions

diff --git a/webapp/client/client.jsx b/webapp/client/client.jsx
index 439d41f78..334f8374d 100644
--- a/webapp/client/client.jsx
+++ b/webapp/client/client.jsx
@@ -113,10 +113,14 @@ export default class Client {
         return `${this.url}${this.urlVersion}/users`;
     }
 
-    getFilesRoute() {
+    getTeamFilesRoute() {
         return `${this.url}${this.urlVersion}/teams/${this.getTeamId()}/files`;
     }
 
+    getFileRoute(fileId) {
+        return `${this.url}${this.urlVersion}/files/${fileId}`;
+    }
+
     getOAuthRoute() {
         return `${this.url}${this.urlVersion}/oauth`;
     }
@@ -1520,40 +1524,71 @@ export default class Client {
             end(this.handleResponse.bind(this, 'getFlaggedPosts', success, error));
     }
 
+    getFileInfosForPost(channelId, postId, success, error) {
+        request.
+            get(`${this.getChannelNeededRoute(channelId)}/posts/${postId}/get_file_infos`).
+            set(this.defaultHeaders).
+            type('application/json').
+            accept('application/json').
+            end(this.handleResponse.bind(this, 'getFileInfosForPost', success, error));
+    }
+
     // Routes for Files
 
-    getFileInfo(filename, success, error) {
+    uploadFile(file, filename, channelId, clientId, success, error) {
+        return request.
+            post(`${this.getTeamFilesRoute()}/upload`).
+            set(this.defaultHeaders).
+            attach('files', file, filename).
+            field('channel_id', channelId).
+            field('client_ids', clientId).
+            accept('application/json').
+            end(this.handleResponse.bind(this, 'uploadFile', success, error));
+    }
+
+    getFile(fileId, success, error) {
         request.
-            get(`${this.getFilesRoute()}/get_info${filename}`).
+            get(`${this.getFileRoute(fileId)}/get`).
             set(this.defaultHeaders).
             type('application/json').
             accept('application/json').
-            end(this.handleResponse.bind(this, 'getFileInfo', success, error));
+            end(this.handleResponse.bind(this, 'getFile', success, error));
     }
 
-    getPublicLink(filename, success, error) {
-        const data = {
-            filename
-        };
+    getFileThumbnail(fileId, success, error) {
+        request.
+            get(`${this.getFileRoute(fileId)}/get_thumbnail`).
+            set(this.defaultHeaders).
+            type('application/json').
+            accept('application/json').
+            end(this.handleResponse.bind(this, 'getFileThumbnail', success, error));
+    }
 
+    getFilePreview(fileId, success, error) {
         request.
-            post(`${this.getFilesRoute()}/get_public_link`).
+            get(`${this.getFileRoute(fileId)}/get`).
             set(this.defaultHeaders).
             type('application/json').
             accept('application/json').
-            send(data).
-            end(this.handleResponse.bind(this, 'getPublicLink', success, error));
+            end(this.handleResponse.bind(this, 'getFilePreview', success, error));
     }
 
-    uploadFile(file, filename, channelId, clientId, success, error) {
-        return request.
-            post(`${this.getFilesRoute()}/upload`).
+    getFileInfo(fileId, success, error) {
+        request.
+            get(`${this.getFileRoute(fileId)}/get_info`).
             set(this.defaultHeaders).
-            attach('files', file, filename).
-            field('channel_id', channelId).
-            field('client_ids', clientId).
+            type('application/json').
             accept('application/json').
-            end(this.handleResponse.bind(this, 'uploadFile', success, error));
+            end(this.handleResponse.bind(this, 'getFileInfo', success, error));
+    }
+
+    getPublicLink(fileId, success, error) {
+        request.
+            get(`${this.getFileRoute(fileId)}/get_public_link`).
+            set(this.defaultHeaders).
+            type('application/json').
+            accept('application/json').
+            end(this.handleResponse.bind(this, 'getPublicLink', success, error));
     }
 
     // Routes for OAuth