MM-21898 - Part 1: Generate and use an interface instead of *A… (#13840)

* Generate and use an interface instead of *App

app/post_metadata.go

@@ -384,12 +384,12 @@ func (a *App) getLinkMetadata(requestURL string, timestamp int64, isNewPost bool
 
 	if (request.URL.Scheme+"://"+request.URL.Host) == a.GetSiteURL() && request.URL.Path == "/api/v4/image" {
 		// /api/v4/image requires authentication, so bypass the API by hitting the proxy directly
-		body, contentType, err = a.ImageProxy.GetImageDirect(a.ImageProxy.GetUnproxiedImageURL(request.URL.String()))
+		body, contentType, err = a.ImageProxy().GetImageDirect(a.ImageProxy().GetUnproxiedImageURL(request.URL.String()))
 	} else {
 		request.Header.Add("Accept", "image/*")
 		request.Header.Add("Accept", "text/html;q=0.8")
 
-		client := a.HTTPService.MakeClient(false)
+		client := a.HTTPService().MakeClient(false)
 		client.Timeout = time.Duration(*a.Config().ExperimentalSettings.LinkMetadataTimeoutMilliseconds) * time.Millisecond
 
 		var res *http.Response
@@ -451,7 +451,7 @@ func getLinkMetadataFromCache(requestURL string, timestamp int64) (*opengraph.Op
 }
 
 func (a *App) getLinkMetadataFromDatabase(requestURL string, timestamp int64) (*opengraph.OpenGraph, *model.PostImage, bool) {
-	linkMetadata, err := a.Srv.Store.LinkMetadata().Get(requestURL, timestamp)
+	linkMetadata, err := a.Srv().Store.LinkMetadata().Get(requestURL, timestamp)
 	if err != nil {
 		return nil, nil, false
 	}
@@ -484,7 +484,7 @@ func (a *App) saveLinkMetadataToDatabase(requestURL string, timestamp int64, og
 		metadata.Type = model.LINK_METADATA_TYPE_NONE
 	}
 
-	_, err := a.Srv.Store.LinkMetadata().Save(metadata)
+	_, err := a.Srv().Store.LinkMetadata().Save(metadata)
 	if err != nil {
 		mlog.Warn("Failed to write link metadata", mlog.String("request_url", requestURL), mlog.Err(err))
 	}