feat: implement web serving

main.go

@@ -0,0 +1,99 @@
+package main
+
+import (
+	"context"
+	"embed"
+	"errors"
+	"flag"
+	"fmt"
+	"io/fs"
+	"log"
+	"net/http"
+	"os"
+	"path/filepath"
+	"tesseract/internal/migration"
+	"tesseract/internal/service"
+	"tesseract/internal/template"
+	"tesseract/internal/workspace"
+
+	"github.com/golang-migrate/migrate/v4"
+	"github.com/labstack/echo/v4"
+	"github.com/labstack/echo/v4/middleware"
+)
+
+//go:embed web/dist/*
+var web embed.FS
+
+func main() {
+	execPath, err := os.Executable()
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	var configPath string
+	flag.StringVar(&configPath, "config", filepath.Join(execPath, "config.json"), "absolute/relative path to the config file.")
+
+	flag.Parse()
+
+	configPath, err = filepath.Abs(configPath)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	f, err := os.Open(configPath)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	config, err := service.ReadConfigFrom(f)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	services, err := service.Initialize(config)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	err = migration.Up(fmt.Sprintf("sqlite://%s", config.DatabasePath))
+	if err != nil && !errors.Is(err, migrate.ErrNoChange) {
+		log.Fatalln(err)
+	}
+
+	log.Println("syncing all workspaces...")
+	syncCtx, cancel := context.WithCancel(context.Background())
+	if err = workspace.SyncAll(syncCtx, services); err != nil {
+		log.Fatalln(err)
+	}
+	cancel()
+
+	apiServer := echo.New()
+
+	webFS, err := fs.Sub(web, "web/dist")
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	apiServer.GET("/*", echo.WrapHandler(http.FileServer(http.FS(webFS))))
+
+	apiServer.Use(services.ReverseProxy.Middleware(), services.Middleware(), middleware.CORS())
+
+	g := apiServer.Group("/api")
+	workspace.DefineRoutes(g, services)
+	template.DefineRoutes(g)
+
+	apiServer.HTTPErrorHandler = func(err error, c echo.Context) {
+		var he *echo.HTTPError
+		if errors.As(err, &he) {
+			if err = c.JSON(he.Code, he.Message); err != nil {
+				c.Logger().Error(err)
+				_ = c.NoContent(http.StatusInternalServerError)
+			}
+		} else {
+			c.Logger().Error(err)
+			_ = c.NoContent(http.StatusInternalServerError)
+		}
+	}
+
+	apiServer.Logger.Fatal(apiServer.Start(":8080"))
+}