feat(global): add templates support ('apps') (#154)

api/api.go

@@ -9,11 +9,12 @@ import (
 
 type (
 	api struct {
-		endpoint    *url.URL
-		bindAddress string
-		assetPath   string
-		dataPath    string
-		tlsConfig   *tls.Config
+		endpoint     *url.URL
+		bindAddress  string
+		assetPath    string
+		dataPath     string
+		tlsConfig    *tls.Config
+		templatesURL string
 	}
 
 	apiConfig struct {
@@ -26,6 +27,7 @@ type (
 		TLSCACertPath string
 		TLSCertPath   string
 		TLSKeyPath    string
+		TemplatesURL  string
 	}
 )
 
@@ -48,10 +50,11 @@ func newAPI(apiConfig apiConfig) *api {
 	}
 
 	return &api{
-		endpoint:    endpointURL,
-		bindAddress: apiConfig.BindAddress,
-		assetPath:   apiConfig.AssetPath,
-		dataPath:    apiConfig.DataPath,
-		tlsConfig:   tlsConfig,
+		endpoint:     endpointURL,
+		bindAddress:  apiConfig.BindAddress,
+		assetPath:    apiConfig.AssetPath,
+		dataPath:     apiConfig.DataPath,
+		tlsConfig:    tlsConfig,
+		templatesURL: apiConfig.TemplatesURL,
 	}
 }

api/handler.go

@@ -25,6 +25,9 @@ func (a *api) newHandler(settings *Settings) http.Handler {
 	mux.HandleFunc("/settings", func(w http.ResponseWriter, r *http.Request) {
 		settingsHandler(w, r, settings)
 	})
+	mux.HandleFunc("/templates", func(w http.ResponseWriter, r *http.Request) {
+		templatesHandler(w, r, a.templatesURL)
+	})
 	return CSRFHandler(newCSRFWrapper(mux))
 }
 

api/main.go

@@ -19,6 +19,7 @@ func main() {
 		swarm     = kingpin.Flag("swarm", "Swarm cluster support").Default("false").Short('s').Bool()
 		labels    = pairs(kingpin.Flag("hide-label", "Hide containers with a specific label in the UI").Short('l'))
 		logo      = kingpin.Flag("logo", "URL for the logo displayed in the UI").String()
+		templates = kingpin.Flag("templates", "URL to the templates (apps) definitions").Default("https://raw.githubusercontent.com/cloud-inovasi/ui-templates/master/templates.json").Short('t').String()
 	)
 	kingpin.Parse()
 
@@ -32,6 +33,7 @@ func main() {
 		TLSCACertPath: *tlscacert,
 		TLSCertPath:   *tlscert,
 		TLSKeyPath:    *tlskey,
+		TemplatesURL:  *templates,
 	}
 
 	settings := &Settings{

api/settings.go

@@ -12,7 +12,7 @@ type Settings struct {
 	Logo         string   `json:"logo"`
 }
 
-// configurationHandler defines a handler function used to encode the configuration in JSON
+// settingsHandler defines a handler function used to encode the configuration in JSON
 func settingsHandler(w http.ResponseWriter, r *http.Request, s *Settings) {
 	json.NewEncoder(w).Encode(*s)
 }

api/templates.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+)
+
+// templatesHandler defines a handler function used to retrieve the templates from a URL and put them in the response
+func templatesHandler(w http.ResponseWriter, r *http.Request, templatesURL string) {
+	resp, err := http.Get(templatesURL)
+	if err != nil {
+		http.Error(w, fmt.Sprintf("Error making request to %s: %s", templatesURL, err.Error()), http.StatusInternalServerError)
+		log.Print(err)
+		return
+	}
+	defer resp.Body.Close()
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		http.Error(w, "Error reading body from templates URL", http.StatusInternalServerError)
+		log.Print(err)
+		return
+	}
+	w.Header().Set("Content-Type", "application/json")
+	w.Write(body)
+}