personal-website/main.go

package main

import (
	"context"
	"errors"
	"log"
	"net/http"
	"os"
	"time"

	"personalwebsite/apps"
	"personalwebsite/apps/blogviewer"
	"personalwebsite/apps/finder"
	imgviewer "personalwebsite/apps/img-viewer"
	"personalwebsite/apps/personalprops"
	"personalwebsite/libs"
	"personalwebsite/routewde"
	"personalwebsite/wde"
	"personalwebsite/webfilesystem"

	"github.com/gin-contrib/cors"
	"github.com/gin-contrib/location"
	"github.com/gin-gonic/gin"
	"github.com/joho/godotenv"
	"go.mongodb.org/mongo-driver/mongo"
	"go.mongodb.org/mongo-driver/mongo/options"
)

func main() {
	if err := godotenv.Load(); err != nil {
		println("No .env file found")
	}

	mongoConnect, err := FindEnv("MONGO_CONNECT")
	if err != nil {
		panic(err.Error())
	}

	dBName, err := FindEnv("DATABASE")
	if err != nil {
		panic(err.Error())
	}

	webFsCollection, err := FindEnv("COLLECTION_WEBFS")
	if err != nil {
		panic(err.Error())
	}

	clientOptions := options.Client().ApplyURI(mongoConnect)
	client, err := mongo.Connect(context.TODO(), clientOptions)
	if err != nil {
		log.Fatal(err)
	}
	err = client.Ping(context.TODO(), nil)
	if err != nil {
		log.Fatal(err)
	}

	router := gin.New()
	router.Use(location.Default())
	router.LoadHTMLGlob("templates/**/*")
	router.Static("/res", "resources")
	// Set a lower memory limit for multipart forms (default is 32 MiB)
	router.MaxMultipartMemory = 8 << 20 // 8 MiB

	router.GET("/", func(ctx *gin.Context) {
		ctx.HTML(http.StatusOK, "index.tmpl", gin.H{})
	})

	webfs := webfilesystem.NewWebFileSystem(client, dBName, webFsCollection)
	webde := wde.NewWDE(webfs)

	persPropsApp := personalprops.NewPersPropsApp(webfs)
	// finderApp := finder.FinderApplication{}
	finderApp := finder.NewFinderApplication(webfs)
	imgViewerApp := imgviewer.NewImgViewerApp(webfs)
	blogViewerApp := blogviewer.NewBlogViewerApp(webfs)
	appsStorage := apps.NewApplicationsStorage(map[string]apps.WebDEApplication{}, webfs)
	appsStorage.Apps["personal-properties"] = &persPropsApp
	appsStorage.Apps["finder"] = finderApp
	appsStorage.Apps["img-viewer"] = &imgViewerApp
	appsStorage.Apps["blog-viewer"] = blogViewerApp

	system := router.Group("system")
	{
		libsGroup := system.Group("libs")
		{
			imgLibGroup := libsGroup.Group("img")
			{
				imgLib := libs.NewImgLib(webfs)
				imgLib.Route(imgLibGroup)
			}

			catLibGroup := libsGroup.Group("cat")
			{
				catLib := libs.NewCatLib(webfs)
				catLib.Route(catLibGroup)
			}

			appsStorageGroup := libsGroup.Group("apps")
			{
				appsStorage.Route(appsStorageGroup)
			}
		}

		wdeGroup := system.Group("wde")
		{
			routewde.Route(wdeGroup, webde)
		}
		apps := system.Group("applications") //TODO to libs
		{
			apps.GET("/:appid/:method", func(ctx *gin.Context) {
				appId := ctx.Param("appid")
				method := ctx.Param("method")

				app, isExist := appsStorage.Apps[appId]
				if !isExist {
					ctx.Status(http.StatusNoContent)
					return
				}
				switch method {
				case "getmanifest":
					ctx.JSON(http.StatusOK, app.GetManifest())
				case "app.js":
					ctx.File("resources/sys/" + appId + "/" + appId + ".js")
				case "app.css":
					ctx.File("resources/sys/" + appId + "/" + appId + ".css")
				default:
					ctx.Status(http.StatusBadRequest)
				}
			})
		}
	}

	fs := router.Group("fs")
	{
		webfs.Route(fs)
	}
	app := router.Group("app")
	{
		persPropApp := app.Group("AboutMe")
		{
			persPropsApp.Route(persPropApp)
		}
		finderAppRoute := app.Group("Finder")
		{
			finderApp.Routes(finderAppRoute)
		}
		imgViewerRoute := app.Group("img-viewer")
		{
			imgViewerApp.Route(imgViewerRoute)
		}
		blogViewerRoute := app.Group("blog-viewer")
		{
			blogViewerApp.Route(blogViewerRoute)
		}

		router.Use(cors.New(cors.Config{
			AllowAllOrigins: true,
			// AllowOrigins:     []string{"http://localhost:8080", "http://localhost:9090"},
			// AllowMethods:     []string{"PUT", "PATCH"},
			// AllowHeaders:     []string{"Origin"},
			ExposeHeaders:    []string{"Content-Length"},
			AllowCredentials: true,
			// AllowOriginFunc: func(origin string) bool {
			// 	return origin == "https://github.com"
			// },
			MaxAge: 12 * time.Hour,
		}))
		err = router.Run(":8080")
		if err != nil {
			log.Panicf("error: %s", err)
		}
	}
}

// func index(c *gin.Context) {
// 	c.HTML(http.StatusOK, "base.html", nil)
// }

func FindEnv(parameter string) (string, error) {
	path, exists := os.LookupEnv(parameter)

	if exists {
		println("[ENV] Requsted " + parameter + " = " + path) //FIXME Only in Debug log
		return path, nil
	} else {
		panic("[ENV] Requsted " + parameter + " not found")
		return "", errors.New("env parameter not found")
	}
}