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

webapp/components/pdf_preview.jsx

@@ -3,8 +3,6 @@
 
 import FileInfoPreview from './file_info_preview.jsx';
 
-import * as Utils from 'utils/utils.jsx';
-
 import loadingGif from 'images/load.gif';
 
 import React from 'react';
@@ -109,18 +107,8 @@ export default class PDFPreview extends React.Component {
         }
     }
 
-    static support(filename) {
-        const fileInfo = Utils.splitFileLocation(filename);
-        const ext = fileInfo.ext;
-        if (!ext) {
-            return false;
-        }
-
-        if (ext === 'pdf') {
-            return true;
-        }
-
-        return false;
+    static supports(fileInfo) {
+        return fileInfo.extension === 'pdf';
     }
 
     render() {
@@ -138,10 +126,8 @@ export default class PDFPreview extends React.Component {
         if (!this.state.success) {
             return (
                 <FileInfoPreview
-                    filename={this.props.filename}
-                    fileUrl={this.props.fileUrl}
                     fileInfo={this.props.fileInfo}
-                    formatMessage={this.props.formatMessage}
+                    fileUrl={this.props.fileUrl}
                 />
             );
         }
@@ -185,8 +171,6 @@ export default class PDFPreview extends React.Component {
 }
 
 PDFPreview.propTypes = {
-    filename: React.PropTypes.string.isRequired,
-    fileUrl: React.PropTypes.string.isRequired,
     fileInfo: React.PropTypes.object.isRequired,
-    formatMessage: React.PropTypes.func.isRequired
+    fileUrl: React.PropTypes.string.isRequired
 };