GH-9633 Added plugin API method to return user's profile image (#9653)

app/plugin_api.go

@@ -323,6 +323,16 @@ func (api *PluginAPI) UpdatePost(post *model.Post) (*model.Post, *model.AppError
 	return api.app.UpdatePost(post, false)
 }
 
+func (api *PluginAPI) GetProfileImage(userId string) ([]byte, *model.AppError) {
+	user, err := api.app.GetUser(userId)
+	if err != nil {
+		return nil, err
+	}
+
+	data, _, err := api.app.GetProfileImage(user)
+	return data, err
+}
+
 func (api *PluginAPI) CopyFileInfos(userId string, fileIds []string) ([]string, *model.AppError) {
 	return api.app.CopyFileInfos(userId, fileIds)
 }

app/plugin_api_test.go

@@ -83,7 +83,7 @@ func TestPluginAPILoadPluginConfiguration(t *testing.T) {
 		}
 
 		type MyPlugin struct {
-			plugin.MattermostPlugin	
+			plugin.MattermostPlugin
 
 			configuration configuration
 		}
@@ -199,3 +199,19 @@ func TestPluginAPILoadPluginConfigurationDefaults(t *testing.T) {
 	_, ret := hooks.MessageWillBePosted(nil, nil)
 	assert.Equal(t, "override35true", ret)
 }
+
+func TestPluginAPIGetProfileImage(t *testing.T) {
+	th := Setup().InitBasic()
+	defer th.TearDown()
+	api := th.SetupPluginAPI()
+
+	// check existing user first
+	data, err := api.GetProfileImage(th.BasicUser.Id)
+	require.Nil(t, err)
+	require.NotEmpty(t, data)
+
+	// then unknown user
+	data, err = api.GetProfileImage(model.NewId())
+	require.NotNil(t, err)
+	require.Nil(t, data)
+}