[MM-24663] Refactor link metadata store to use squirrel (#14464)

* Refactor link_metadata_store to use squirrel

* Fix sql buil error string

* Fix := on second err

* Merging code to a single Where call

* Saving a line.

Co-authored-by: Ibrahim Serdar Acikgoz <serdaracikgoz86@gmail.com>

Co-authored-by: mattermod <mattermod@users.noreply.github.com>
Co-authored-by: Dante Pippi <dantepippi@gmai.com>
Co-authored-by: dantepippi <dantepippi@users.noreply.github.com>
Co-authored-by: Ibrahim Serdar Acikgoz <serdaracikgoz86@gmail.com>

store/sqlstore/link_metadata_store.go

@@ -7,6 +7,8 @@ import (
 	"database/sql"
 	"net/http"
 
+	sq "github.com/Masterminds/squirrel"
+
 	"github.com/mattermost/mattermost-server/v5/model"
 	"github.com/mattermost/mattermost-server/v5/store"
 )
@@ -53,15 +55,15 @@ func (s SqlLinkMetadataStore) Save(metadata *model.LinkMetadata) (*model.LinkMet
 
 func (s SqlLinkMetadataStore) Get(url string, timestamp int64) (*model.LinkMetadata, *model.AppError) {
 	var metadata *model.LinkMetadata
-
+	query, args, err := s.getQueryBuilder().
-	err := s.GetReplica().SelectOne(&metadata,
+		Select("*").
-		`SELECT
+		From("LinkMetadata").
-			*
+		Where(sq.Eq{"URL": url, "Timestamp": timestamp}).
-		FROM
+		ToSql()
-			LinkMetadata
+	if err != nil {
-		WHERE
+		return nil, model.NewAppError("SqlLinkMetadataStore.Get", "store.sql.build_query.app_error", nil, err.Error(), http.StatusInternalServerError)
-			URL = :URL
+	}
-			AND Timestamp = :Timestamp`, map[string]interface{}{"URL": url, "Timestamp": timestamp})
+	err = s.GetReplica().SelectOne(&metadata, query, args...)
 	if err != nil {
 		if err == sql.ErrNoRows {
 			return nil, model.NewAppError("SqlLinkMetadataStore.Get", "store.sql_link_metadata.get.app_error", nil, "url="+url+", "+err.Error(), http.StatusNotFound)