Split business logic from routes handler logic

internal/articlesHandlers.go

@@ -0,0 +1,87 @@
+package internal
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"go.mongodb.org/mongo-driver/bson"
+)
+
+func GetAllArticlesHandler(c *gin.Context) {
+	documents, err := getDocuments(articlesLocation, bson.D{})
+	if err != nil {
+		SendBadRequest(c, err.Error())
+		return
+	}
+	c.JSON(http.StatusOK, GetAllArticlesBusiness(documents))
+}
+
+func GetArticleHandler(c *gin.Context) {
+	articleID := c.Params.ByName("id")
+	articles, err := getDocuments(articlesLocation,
+		bson.D{{Key: "id_name", Value: articleID}})
+	if err != nil {
+		SendBadRequest(c, err.Error())
+		return
+	}
+	if len(articles) == 0 {
+		SendBadRequest(c, "The ID provided doesn't match any article.")
+		return
+	}
+	var parsedArticle Article
+	bson.Unmarshal(articles[0], &parsedArticle)
+	c.JSON(http.StatusOK, parsedArticle)
+}
+
+func AddArticleHandler(c *gin.Context) {
+	var article Article
+	article.IdName = c.Params.ByName("id")
+	if c.BindJSON(&article) != nil {
+		SendBadRequest(c, "Could not correctly parse the article.")
+		return
+	}
+
+	document, err := bson.Marshal(article)
+	if err != nil {
+		SendBadRequest(c, "Could not correctly marshal the article.")
+		return
+	}
+
+	documents, _ := getDocuments(articlesLocation, gin.H{})
+	if IsArticleIdAlreadyUsed(article.IdName, documents) {
+		SendBadRequest(c, "Article ID already used.")
+		return
+	}
+
+	err = pushDocument(articlesLocation, document)
+	if err != nil {
+		SendBadRequest(c, "Could not insert document into DB.")
+		return
+	}
+
+	SendOk(c, "Article successfully added!")
+}
+
+func DeleteArticleHandler(c *gin.Context) {
+	var delArticle DelArticle
+	delArticle.IdName = c.Params.ByName("id")
+	if c.BindJSON(&delArticle) != nil {
+		SendBadRequest(c, "Could not correctly parse the article ID.")
+		return
+	}
+
+	document, err := bson.Marshal(delArticle)
+	if err != nil {
+		SendBadRequest(c, "Could not correctly marshal the article ID.")
+		return
+	}
+
+	deleteCount, err := deleteDocument(articlesLocation, document)
+	if err != nil {
+		SendBadRequest(c, "Could not insert document into DB.")
+		return
+	}
+
+	SendOk(c, fmt.Sprintf("%d articles were successfully deleted!", deleteCount))
+}