Adding ability for plugin system to respect the defaults listed in the plugin manifest. (#9066)

app/diagnostics.go

@@ -4,7 +4,6 @@
 package app
 
 import (
-	"encoding/json"
 	"runtime"
 
 	"github.com/mattermost/mattermost-server/mlog"
@@ -98,13 +97,7 @@ func pluginSetting(pluginSettings *model.PluginSettings, plugin, key string, def
 	if !ok {
 		return defaultValue
 	}
-	var m map[string]interface{}
-	if b, err := json.Marshal(settings); err != nil {
-		return defaultValue
-	} else {
-		json.Unmarshal(b, &m)
-	}
-	if value, ok := m[key]; ok {
+	if value, ok := settings[key]; ok {
 		return value
 	}
 	return defaultValue

app/diagnostics_test.go

@@ -32,8 +32,8 @@ func newTestServer() (chan string, *httptest.Server) {
 
 func TestPluginSetting(t *testing.T) {
 	settings := &model.PluginSettings{
-		Plugins: map[string]interface{}{
-			"test": map[string]string{
+		Plugins: map[string]map[string]interface{}{
+			"test": map[string]interface{}{
 				"foo": "bar",
 			},
 		},

app/plugin_api.go

@@ -6,30 +6,45 @@ package app
 import (
 	"encoding/json"
 	"fmt"
+	"strings"
 
 	"github.com/mattermost/mattermost-server/mlog"
 	"github.com/mattermost/mattermost-server/model"
 )
 
 type PluginAPI struct {
-	id     string
-	app    *App
-	logger *mlog.SugarLogger
+	id       string
+	app      *App
+	logger   *mlog.SugarLogger
+	manifest *model.Manifest
 }
 
 func NewPluginAPI(a *App, manifest *model.Manifest) *PluginAPI {
 	return &PluginAPI{
-		id:     manifest.Id,
-		app:    a,
-		logger: a.Log.With(mlog.String("plugin_id", manifest.Id)).Sugar(),
+		id:       manifest.Id,
+		manifest: manifest,
+		app:      a,
+		logger:   a.Log.With(mlog.String("plugin_id", manifest.Id)).Sugar(),
 	}
 }
 
 func (api *PluginAPI) LoadPluginConfiguration(dest interface{}) error {
-	if b, err := json.Marshal(api.app.Config().PluginSettings.Plugins[api.id]); err != nil {
+	finalConfig := make(map[string]interface{})
+
+	// First set final config to defaults
+	for _, setting := range api.manifest.SettingsSchema.Settings {
+		finalConfig[strings.ToLower(setting.Key)] = setting.Default
+	}
+
+	// If we have settings given we override the defaults with them
+	for setting, value := range api.app.Config().PluginSettings.Plugins[api.id] {
+		finalConfig[strings.ToLower(setting)] = value
+	}
+
+	if pluginSettingsJsonBytes, err := json.Marshal(finalConfig); err != nil {
 		return err
 	} else {
-		return json.Unmarshal(b, dest)
+		return json.Unmarshal(pluginSettingsJsonBytes, dest)
 	}
 }
 

model/config.go

@@ -1717,7 +1717,7 @@ type PluginSettings struct {
 	EnableUploads   *bool
 	Directory       *string
 	ClientDirectory *string
-	Plugins         map[string]interface{}
+	Plugins         map[string]map[string]interface{}
 	PluginStates    map[string]*PluginState
 }
 
@@ -1747,7 +1747,7 @@ func (s *PluginSettings) SetDefaults() {
 	}
 
 	if s.Plugins == nil {
-		s.Plugins = make(map[string]interface{})
+		s.Plugins = make(map[string]map[string]interface{})
 	}
 
 	if s.PluginStates == nil {