docs: add OpenAPI documentation with Scalar UI

- Add swaggo annotations to all HTTP handlers - Add Swagger/OpenAPI spec generation with swag - Create separate docs server binary (drexa-docs) - Add Makefile with build, run, and docs targets - Configure Scalar as the API documentation UI Run 'make docs' to regenerate, 'make run-docs' to serve.
2026-02-02 13:11:18 +00:00 · 2025-12-13 22:44:37 +00:00
parent 918b85dfd5
commit 7b13326e22
18 changed files with 4853 additions and 59 deletions
--- a/apps/backend/cmd/docs/main.go
+++ b/apps/backend/cmd/docs/main.go
@@ -0,0 +1,84 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"os"
+
+	_ "github.com/get-drexa/drexa/docs"
+	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v2/middleware/cors"
+	"github.com/gofiber/fiber/v2/middleware/logger"
+	"github.com/swaggo/swag"
+)
+
+func main() {
+	port := flag.Int("port", 8081, "port to listen on")
+	apiURL := flag.String("api-url", "http://localhost:8080", "base URL of the API server")
+	flag.Parse()
+
+	app := fiber.New(fiber.Config{
+		AppName: "Drexa API Documentation",
+	})
+
+	app.Use(logger.New())
+	app.Use(cors.New())
+
+	// Serve Scalar UI
+	app.Get("/", func(c *fiber.Ctx) error {
+		html := fmt.Sprintf(`<!DOCTYPE html>
+<html>
+<head>
+	<title>Drexa API Documentation</title>
+	<meta charset="utf-8" />
+	<meta name="viewport" content="width=device-width, initial-scale=1" />
+	<link rel="icon" type="image/svg+xml" href="data:image/svg+xml,%%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%%3E%%3Ctext y='.9em' font-size='90'%%3E📚%%3C/text%%3E%%3C/svg%%3E" />
+</head>
+<body>
+	<script
+		id="api-reference"
+		data-url="/openapi.json"
+		data-configuration='{
+			"theme": "kepler",
+			"darkMode": true,
+			"authentication": {
+				"preferredSecurityScheme": "BearerAuth"
+			},
+			"servers": [
+				{
+					"url": "%s",
+					"description": "API Server"
+				}
+			]
+		}'
+	></script>
+	<script src="https://cdn.jsdelivr.net/npm/@scalar/api-reference"></script>
+</body>
+</html>`, *apiURL)
+		c.Set("Content-Type", "text/html; charset=utf-8")
+		return c.SendString(html)
+	})
+
+	// Serve OpenAPI spec
+	app.Get("/openapi.json", func(c *fiber.Ctx) error {
+		c.Set("Content-Type", "application/json")
+		c.Set("Access-Control-Allow-Origin", "*")
+		doc, err := swag.ReadDoc()
+		if err != nil {
+			return c.Status(fiber.StatusInternalServerError).SendString(err.Error())
+		}
+		return c.SendString(doc)
+	})
+
+	// Health check
+	app.Get("/health", func(c *fiber.Ctx) error {
+		return c.JSON(fiber.Map{"status": "ok"})
+	})
+
+	fmt.Fprintf(os.Stderr, "📚 Drexa API Documentation server starting on http://localhost:%d\n", *port)
+	fmt.Fprintf(os.Stderr, "   API server configured at: %s\n", *apiURL)
+
+	log.Fatal(app.Listen(fmt.Sprintf(":%d", *port)))
+}
+