Implement basic web server structure and get paste endpoint

internal/web/controllers/v1/pastes.go

@@ -0,0 +1,47 @@
+package v1
+
+import (
+	"encoding/json"
+	"github.com/Lukaesebrot/pasty/internal/storage"
+	"github.com/bwmarrin/snowflake"
+	"github.com/fasthttp/router"
+	"github.com/valyala/fasthttp"
+)
+
+// InitializePastesController initializes the '/v1/pastes/*' controller
+func InitializePastesController(group *router.Group) {
+	group.GET("/{id}", v1GetPaste)
+}
+
+// v1GetPaste handles the 'GET /v1/pastes/{id}' endpoint
+func v1GetPaste(ctx *fasthttp.RequestCtx) {
+	// Parse the ID
+	id, err := snowflake.ParseString(ctx.UserValue("id").(string))
+	if err != nil {
+		ctx.SetStatusCode(fasthttp.StatusBadRequest)
+		ctx.SetBodyString("invalid ID format")
+		return
+	}
+
+	// Retrieve the paste
+	paste, err := storage.Current.Get(id)
+	if err != nil {
+		ctx.SetStatusCode(fasthttp.StatusInternalServerError)
+		ctx.SetBodyString(err.Error())
+		return
+	}
+	if paste == nil {
+		ctx.SetStatusCode(fasthttp.StatusNotFound)
+		ctx.SetBodyString("paste not found")
+		return
+	}
+
+	// Respond with the paste
+	jsonData, err := json.Marshal(paste)
+	if err != nil {
+		ctx.SetStatusCode(fasthttp.StatusInternalServerError)
+		ctx.SetBodyString(err.Error())
+		return
+	}
+	ctx.SetBody(jsonData)
+}

internal/web/web.go

@@ -0,0 +1,29 @@
+package web
+
+import (
+	"github.com/Lukaesebrot/pasty/internal/env"
+	v1 "github.com/Lukaesebrot/pasty/internal/web/controllers/v1"
+	routing "github.com/fasthttp/router"
+	"github.com/valyala/fasthttp"
+)
+
+// Serve serves the web server
+func Serve() error {
+	// Create the router
+	router := routing.New()
+
+	// Route the API endpoints
+	apiRoute := router.Group("/api")
+	{
+		v1Route := apiRoute.Group("/v1")
+		{
+			v1.InitializePastesController(v1Route.Group("/pastes"))
+		}
+	}
+
+	// TODO: Route the paste endpoints
+
+	// Serve the web server
+	address := env.Get("WEB_ADDRESS", ":8080")
+	return fasthttp.ListenAndServe(address, router.Handler)
+}