From eb862be55d9193cf52e6f67861d9789a496ea7d7 Mon Sep 17 00:00:00 2001
From: Pau Costa <mico@micodev.es>
Date: Sun, 7 Jul 2024 14:25:47 +0200
Subject: [PATCH] feat: add update event route

---
 functional-test/events.http | 15 ++++++++++++++-
 models/event.go             | 24 +++++++++++++++++++++++
 routes/events.routes.go     | 38 +++++++++++++++++++++++++++++++++++++
 routes/routes.go            |  1 +
 4 files changed, 77 insertions(+), 1 deletion(-)

diff --git a/functional-test/events.http b/functional-test/events.http
index d419006..9bf2bc3 100644
--- a/functional-test/events.http
+++ b/functional-test/events.http
@@ -17,4 +17,17 @@ content-type: application/json
 GET http://localhost:8080/events/1
 ### Get a non existing event
 GET http://localhost:8080/events/10000
-###
\ No newline at end of file
+###
+
+
+### Update an existing event
+PUT http://localhost:8080/events/1
+content-type: application/json
+
+{
+  "name": "My test event",
+  "description": "this is a event I created for testing",
+  "location": "test QUACK location",
+  "dateTime": "2025-01-01T13:40:00.000Z",
+  "UserId": 0
+}
\ No newline at end of file
diff --git a/models/event.go b/models/event.go
index 13ab0ac..ab8a2b8 100644
--- a/models/event.go
+++ b/models/event.go
@@ -1,6 +1,7 @@
 package models
 
 import (
+	"database/sql"
 	"fmt"
 	"time"
 	"udemy_httpserver/db"
@@ -39,6 +40,29 @@ func (e *Event) Save() error {
 	return err
 }
 
+func (e *Event) Update() error {
+	query := `
+	UPDATE events SET 
+	name = $1, description = $2, location = $3, dateTime = $4, user_id = $5 
+	WHERE id = $6
+    `
+	statement, err := db.Conn.Prepare(query)
+	if err != nil {
+		fmt.Println("Something went wrong trying to prepare statement", err)
+		return err
+	}
+	defer func(statement *sql.Stmt) {
+		err := statement.Close()
+		if err != nil {
+			fmt.Println("Something went wrong trying to close statement", err)
+			return
+		}
+	}(statement)
+	_, err = statement.Exec(e.Name, e.Description, e.Location, e.DateTime, e.UserID, e.ID)
+
+	return err
+}
+
 func GetAllEvents() ([]Event, error) {
 	// TODO: implement paging
 	selectQuery := `SELECT * FROM events`
diff --git a/routes/events.routes.go b/routes/events.routes.go
index 4759400..8912ee6 100644
--- a/routes/events.routes.go
+++ b/routes/events.routes.go
@@ -51,3 +51,41 @@ func getSingleEvent(c *gin.Context) {
 	}
 	c.JSON(http.StatusOK, *candidateEvent)
 }
+
+func updateEvent(c *gin.Context) {
+	// First we try to parse the json body into a struct
+	var event models.Event
+	err := c.ShouldBindJSON(&event)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	// We try to find the event by id
+	eventID, err := strconv.ParseInt(c.Param("id"), 10, 64)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	// If we get a db error, we return a 500 error
+	candidateEvent, err := models.FindEventById(int(eventID))
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	// If the event is not found, we return a 404
+	if candidateEvent == nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "event not found"})
+		return
+	}
+	// If the event is found, we update it
+	event.ID = candidateEvent.ID
+	if event.UserID == 0 {
+		event.UserID = candidateEvent.UserID
+	}
+	err = event.Update()
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, event)
+}
diff --git a/routes/routes.go b/routes/routes.go
index 34b2a4a..7a629ba 100644
--- a/routes/routes.go
+++ b/routes/routes.go
@@ -6,4 +6,5 @@ func RegisterRoutes(router *gin.Engine) {
 	router.POST("/events", postEvent)
 	router.GET("/events", getEvents)
 	router.GET("/events/:id", getSingleEvent)
+	router.PUT("/events/:id", updateEvent)
 }