added delete contact route

.idea/dataSources.xml

@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="DataSourceManagerImpl" format="xml" multifile-model="true">
-    <data-source source="LOCAL" name="postgres@192.168.0.47" uuid="fc534921-0a7d-4120-bac3-e6f8ac7fb7a1">
-      <driver-ref>postgresql</driver-ref>
-      <synchronize>true</synchronize>
-      <jdbc-driver>org.postgresql.Driver</jdbc-driver>
-      <jdbc-url>jdbc:postgresql://192.168.0.47:5432/postgres</jdbc-url>
-      <jdbc-additional-properties>
-        <property name="com.intellij.clouds.kubernetes.db.host.port" />
-        <property name="com.intellij.clouds.kubernetes.db.enabled" value="false" />
-        <property name="com.intellij.clouds.kubernetes.db.container.port" />
-      </jdbc-additional-properties>
-      <working-dir>$ProjectFileDir$</working-dir>
-    </data-source>
-  </component>
-</project>

.idea/sqldialects.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="SqlDialectMappings">
-    <file url="file://$PROJECT_DIR$/database/db.go" dialect="GenericSQL" />
+    <file url="file://$PROJECT_DIR$/database/auth.go" dialect="PostgreSQL" />
     <file url="PROJECT" dialect="PostgreSQL" />
   </component>
 </project>

database/auth.go

@@ -52,6 +52,9 @@ func InsertUser(db *sql.DB, username string, passwordHash string) (string, error
 	if err != nil {
 		return "", fmt.Errorf("error inserting user: %v", err)
 	}
+
+	log.Printf("Inserted user: %v", username)
+
 	return userId, err
 }
 
@@ -64,8 +67,8 @@ func GetPasswordHash(db *sql.DB, username string) (string, error) {
 	var passwordHash string
 	err := db.QueryRow(query, username).Scan(&passwordHash)
 	if err != nil {
-		fmt.Printf("error getting password: %v\n", err)
-		return "", fmt.Errorf("error getting password: %v", err)
+		fmt.Printf("error getting password hash: %v\n", err)
+		return "", fmt.Errorf("error getting password hash: %v", err)
 	}
 
 	return passwordHash, err

database/contacts.go

@@ -0,0 +1,88 @@
+package database
+
+import (
+	"database/sql"
+	"errors"
+	"fmt"
+	"github.com/google/uuid"
+	"log"
+)
+
+func DeleteContact(db *sql.DB, userID uuid.UUID, conversationID uuid.UUID) (string, error) {
+	// Check conversation type
+	var conversationType string
+	err := db.QueryRow(
+		"SELECT conversation_type FROM Conversations WHERE conversation_id = $1",
+		conversationID,
+	).Scan(&conversationType)
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return "no conversation found for this id", nil
+		}
+		return "", fmt.Errorf("error checking conversation type: %w", err)
+	}
+
+	if conversationType == "group" {
+		// Delete from Contacts
+		res, err := db.Exec(
+			"DELETE FROM Contacts WHERE conversation_id = $1 AND user_id = $2",
+			conversationID,
+			userID,
+		)
+		if err != nil {
+			return "", fmt.Errorf("error deleting contact: %w", err)
+		}
+
+		rowsAffected, err := res.RowsAffected()
+		if err != nil {
+			return "", fmt.Errorf("error checking contact deletion: %w", err)
+		}
+		if rowsAffected == 0 {
+			return fmt.Sprintf("no matching contact found with conversation id: %s, user id: %s", conversationID, userID), nil
+		}
+
+		// Delete from Memberships
+		res, err = db.Exec(
+			"DELETE FROM Memberships WHERE conversation_id = $1 AND user_id = $2",
+			conversationID,
+			userID,
+		)
+		if err != nil {
+			return "", fmt.Errorf("error deleting membership: %w", err)
+		}
+
+		rowsAffected, err = res.RowsAffected()
+		if err != nil {
+			return "", fmt.Errorf("error checking membership deletion: %w", err)
+		}
+		if rowsAffected == 0 {
+			return "", fmt.Errorf("no matching membership found with conversation id: %s, user id: %s", conversationID, userID)
+		}
+
+		log.Printf("Successfully removed user %s from group %s", userID, conversationID)
+	} else {
+		// Handle direct conversation
+		res, err := db.Exec(
+			"DELETE FROM Contacts WHERE user_id = $1 AND conversation_id = $2",
+			userID,
+			conversationID,
+		)
+		if err != nil {
+			log.Printf("Error deleting contact: %v", err)
+			return "", fmt.Errorf("error deleting contact: %w", err)
+		}
+
+		rowsAffected, err := res.RowsAffected()
+		if err != nil {
+			log.Printf("Error checking contact deletion: %v", err)
+			return "", fmt.Errorf("error checking contact deletion: %w", err)
+		}
+		if rowsAffected == 0 {
+			return fmt.Sprintf("no matching contact found with user id: %s, conversation id: %s", userID, conversationID), nil
+		}
+
+		log.Printf("Successfully deleted contact for user %s in conversation %s", userID, conversationID)
+	}
+
+	return "", nil
+}

handlers/auth.go

@@ -9,27 +9,34 @@ import (
 	"relay-server/config"
 	"relay-server/database"
 	"relay-server/helpers"
-	"relay-server/model"
 	"time"
 )
 
 func Signup(c *fiber.Ctx) error {
+
+	type SignupStruct struct {
+		Username string `json:"username" xml:"username" form:"username"`
+		Password string `json:"password" xml:"password" form:"password"`
+	}
+
 	db := database.DB
-	u := new(model.SignupStruct)
+	u := new(SignupStruct)
 	if err := c.BodyParser(u); err != nil {
 		return err
 	}
 	// Checks if username or passwords are empty
 	if u.Username == "" {
 		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "username is empty"})
-	} else if u.Password == "" {
+	}
+	if u.Password == "" {
 		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "password is empty"})
 	}
 
 	// Checks if passwords or username have valid length and characters
 	if !helpers.IsValidPassword(u.Password) {
 		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "invalid password"})
-	} else if !helpers.IsValidUsername(u.Username) {
+	}
+	if !helpers.IsValidUsername(u.Username) {
 		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "invalid username"})
 	}
 
@@ -74,8 +81,14 @@ func Signup(c *fiber.Ctx) error {
 }
 
 func Login(c *fiber.Ctx) error {
+
+	type loginStruct struct {
+		Username string `json:"username" xml:"username" form:"username"`
+		Password string `json:"password" xml:"password" form:"password"`
+	}
+
 	db := database.DB
-	u := new(model.LoginStruct)
+	u := new(loginStruct)
 
 	if err := c.BodyParser(u); err != nil {
 		return err
@@ -84,14 +97,16 @@ func Login(c *fiber.Ctx) error {
 	// Checks if username or passwords are empty
 	if u.Username == "" {
 		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "username is empty"})
-	} else if u.Password == "" {
+	}
+	if u.Password == "" {
 		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "password is empty"})
 	}
 
 	// Checks if username or passwords have valid length and characters
 	if !helpers.IsValidUsername(u.Username) {
 		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "invalid username"})
-	} else if !helpers.IsValidPassword(u.Password) {
+	}
+	if !helpers.IsValidPassword(u.Password) {
 		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "invalid password"})
 	}
 

handlers/contacts.go

@@ -0,0 +1,42 @@
+package handlers
+
+import (
+	"github.com/gofiber/fiber/v2"
+	"github.com/google/uuid"
+	"log"
+	"relay-server/database"
+)
+
+func DeleteContact(c *fiber.Ctx) error {
+
+	type params struct {
+		ContactId      uuid.UUID `params:"contact_id"`
+		ConversationId uuid.UUID `params:"conversation_id"`
+	}
+
+	p := new(params)
+	if err := c.ParamsParser(p); err != nil {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "Invalid params"})
+	}
+
+	db := database.DB
+
+	if p.ContactId == uuid.Nil {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"message": "contact_id is empty"})
+	}
+	if p.ConversationId == uuid.Nil {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"message": "conversation_id is empty"})
+	}
+
+	msg, err := database.DeleteContact(db, p.ContactId, p.ConversationId)
+	if err != nil {
+		log.Println(err)
+		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{"error": "Failed to delete contact"})
+	}
+	if msg != "" {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"message": msg})
+	}
+	log.Println("Contact deleted")
+
+	return c.Status(fiber.StatusOK).JSON(fiber.Map{"message": "Contact deleted"})
+}

model/model.go

@@ -2,16 +2,6 @@ package model
 
 import "github.com/golang-jwt/jwt/v5"
 
-type LoginStruct struct {
-	Username string `json:"username" xml:"username" form:"username"`
-	Password string `json:"password" xml:"password" form:"password"`
-}
-
-type SignupStruct struct {
-	Username string `json:"username" xml:"username" form:"username"`
-	Password string `json:"password" xml:"password" form:"password"`
-}
-
 type UserClaims struct {
 	Username string `json:"username"`
 	UserId   string `json:"user_id"`

router/router.go

@@ -12,10 +12,15 @@ func SetupRoutes(app *fiber.App) {
 		return c.SendString("Hello, World!")
 	})
 	api := app.Group("/api", logger.New())
+	chat := api.Group("/chat", middleware.Protected(), logger.New())
 
 	// Auth group
 	auth := api.Group("/auth", middleware.Protected(), handlers.ValidateToken)
 	auth.Post("/signup", handlers.Signup)
 	auth.Post("/login", handlers.Login)
 	auth.Get("/validate", handlers.ValidateToken)
+
+	// Contacts group
+	contacts := chat.Group("/contacts", middleware.Protected(), logger.New())
+	contacts.Delete("/:contact_id/:conversation_id", handlers.DeleteContact)
 }