Rewrite environment variable configurations

api/utils/Endpoints.go

@@ -0,0 +1,82 @@
+package utils
+
+import (
+	"fmt"
+	"log"
+	"net/url"
+	"os"
+	"path"
+	"strconv"
+)
+
+func ApiListenUrl() *url.URL {
+	const defaultPort = "4001"
+
+	shouldServeUI := os.Getenv("SERVE_UI") == "1"
+
+	apiPrefix := "/"
+	if shouldServeUI {
+		apiPrefix = "/api"
+	}
+
+	var listenAddr string
+
+	listenAddr = os.Getenv("API_LISTEN_IP")
+	if listenAddr == "" {
+		listenAddr = "127.0.0.1"
+	}
+
+	listenPortStr := os.Getenv("API_LISTEN_PORT")
+	if listenPortStr == "" {
+		listenPortStr = defaultPort
+	}
+
+	listenPort, err := strconv.Atoi(listenPortStr)
+	if err != nil {
+		log.Fatalf("API_LISTEN_PORT must be a number: '%s'\n%s", listenPortStr, err)
+	}
+
+	apiUrl, err := url.Parse(fmt.Sprintf("http://%s:%d", listenAddr, listenPort))
+	if err != nil {
+		log.Fatalf("Could not format api url: %s", err)
+	}
+	apiUrl.Path = apiPrefix
+
+	return apiUrl
+}
+
+func ApiEndpointUrl() *url.URL {
+	apiEndpointStr := os.Getenv("API_ENDPOINT")
+
+	shouldServeUI := os.Getenv("SERVE_UI") == "1"
+	if shouldServeUI {
+		apiEndpointStr = os.Getenv("PUBLIC_ENDPOINT")
+	}
+
+	apiEndpointUrl, err := url.Parse(apiEndpointStr)
+	if err != nil {
+		log.Fatalf("ERROR: Environment variable API_ENDPOINT is not a proper url")
+	}
+
+	if shouldServeUI {
+		apiEndpointUrl.Path = path.Join(apiEndpointUrl.Path, "/api")
+	}
+
+	return apiEndpointUrl
+}
+
+func UiEndpointUrl() *url.URL {
+	uiEndpointStr := os.Getenv("UI_ENDPOINT")
+
+	shouldServeUI := os.Getenv("SERVE_UI") == "1"
+	if shouldServeUI {
+		uiEndpointStr = os.Getenv("PUBLIC_ENDPOINT")
+	}
+
+	uiEndpointUrl, err := url.Parse(uiEndpointStr)
+	if err != nil {
+		log.Fatalf("ERROR: Environment variable UI_ENDPOINT is not a proper url")
+	}
+
+	return uiEndpointUrl
+}