Refactoring der ProduktService Api. Abhängigkeit via DI hinzufügen.

cmd/websrv/main.go

@@ -1,43 +1,15 @@
 package main
 
 import (
-	"encoding/json"
 	"fmt"
-	"io"
 	"log"
 	"net/http"
 	"os"
 
+	"gittea.marcokittel.de/elio/eliotools/datawriter/internal/api"
 	"gittea.marcokittel.de/elio/eliotools/datawriter/internal/database"
 )
 
-type Container struct {
-	Products map[string]int `json:"products"`
-	Context  Context        `json:"context"`
-}
-
-type Product struct {
-	Warehouse string `json:"warehouse"`
-	Quantity  int    `json:"quantity"`
-	Delivery  int    `json:"delivery_time"`
-}
-
-type OutgoingProducts struct {
-	Products map[string][]Product `json:"products"`
-}
-
-func NewOutgoingProducts() *OutgoingProducts {
-	op := OutgoingProducts{
-		Products: make(map[string][]Product),
-	}
-	return &op
-}
-
-type Context struct {
-	Country string `json:"country"`
-	State   string `json:"state"`
-}
-
 var (
 	connectionString = ""
 	port             = ":8080"
@@ -54,36 +26,8 @@ func main() {
 		fmt.Println("Connectionstring fehlt!. Bsp.:  <user>:<passwort>@tcp(127.0.0.1:3306)/elio?parseTime=true")
 		return
 	}
-	//Env Variablen nutzen
-	http.HandleFunc("/api/products", func(w http.ResponseWriter, r *http.Request) {
-		if r.Method != "POST" {
-			return
-		}
-		defer r.Body.Close()
-		data, err := io.ReadAll(r.Body)
-		if err != nil {
-			log.Println(err)
-			return
-		}
-		var payload database.Container
-		err = json.Unmarshal(data, &payload)
-		if err != nil {
-			log.Printf("Could not parse Json: %s", err)
-			return
-		}
-		result, err := nps.FetchData(&payload)
-		if err != nil {
-			//Todo Fehlerhandling
-			log.Println(err)
-		}
-		jsonResult, err := json.Marshal(result)
-		if err != nil {
-			log.Println(err)
-		}
-		w.Header().Set("Content-Type", "application/json")
-		w.WriteHeader(http.StatusOK)
-		fmt.Fprintln(w, string(jsonResult))
-	})
+	//Dependency Injection
+	http.HandleFunc("/api/products", api.GetProductApiHandleFunc(nps))
 	log.Printf("Easy Peasy: Die Party startet auf Port %s\n", port)
 	log.Printf("Probiers mal damit: %s\n", curlhelp)
 	log.Fatal(http.ListenAndServe(port, nil))

internal/api/products.go

@@ -0,0 +1,70 @@
+package api
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+
+	"gittea.marcokittel.de/elio/eliotools/datawriter/internal/database"
+)
+
+type Container struct {
+	Products map[string]int `json:"products"`
+	Context  Context        `json:"context"`
+}
+
+type Product struct {
+	Warehouse string `json:"warehouse"`
+	Quantity  int    `json:"quantity"`
+	Delivery  int    `json:"delivery_time"`
+}
+
+type OutgoingProducts struct {
+	Products map[string][]Product `json:"products"`
+}
+
+func NewOutgoingProducts() *OutgoingProducts {
+	op := OutgoingProducts{
+		Products: make(map[string][]Product),
+	}
+	return &op
+}
+
+type Context struct {
+	Country string `json:"country"`
+	State   string `json:"state"`
+}
+
+func GetProductApiHandleFunc(nps *database.ProductService) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != "POST" {
+			return
+		}
+		defer r.Body.Close()
+		data, err := io.ReadAll(r.Body)
+		if err != nil {
+			log.Println(err)
+			return
+		}
+		var payload database.Container
+		err = json.Unmarshal(data, &payload)
+		if err != nil {
+			log.Printf("Could not parse Json: %s", err)
+			return
+		}
+		result, err := nps.FetchData(&payload)
+		if err != nil {
+			//Todo Fehlerhandling
+			log.Println(err)
+		}
+		jsonResult, err := json.Marshal(result)
+		if err != nil {
+			log.Println(err)
+		}
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		fmt.Fprintln(w, string(jsonResult))
+	}
+}