[API] Expose allowed Reactions (#11735)

* [API] Expose allowed Reactions

* dont be in soutch a rush

* add TEST

* use ElementsMatch

Co-authored-by: Lauris BH <lauris@nix.lv>

routers/api/v1/api.go

@@ -512,6 +512,9 @@ func RegisterRoutes(m *macaron.Macaron) {
 		m.Get("/signing-key.gpg", misc.SigningKey)
 		m.Post("/markdown", bind(api.MarkdownOption{}), misc.Markdown)
 		m.Post("/markdown/raw", misc.MarkdownRaw)
+		m.Group("/settings", func() {
+			m.Get("/allowed_reactions", misc.SettingGetsAllowedReactions)
+		})
 
 		// Notifications
 		m.Group("/notifications", func() {

routers/api/v1/misc/settings.go

@@ -0,0 +1,23 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package misc
+
+import (
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/setting"
+)
+
+// SettingGetsAllowedReactions return allowed reactions
+func SettingGetsAllowedReactions(ctx *context.APIContext) {
+	// swagger:operation GET /settings/allowed_reactions miscellaneous getAllowedReactions
+	// ---
+	// summary: Returns string array of allowed reactions
+	// produces:
+	// - application/json
+	// responses:
+	//   "200":
+	//     "$ref": "#/responses/StringSlice"
+	ctx.JSON(200, setting.UI.Reactions)
+}

routers/api/v1/swagger/misc.go

@@ -14,3 +14,10 @@ type swaggerResponseServerVersion struct {
 	// in:body
 	Body api.ServerVersion `json:"body"`
 }
+
+// StringSlice
+// swagger:response StringSlice
+type swaggerResponseStringSlice struct {
+	// in:body
+	Body []string `json:"body"`
+}