Added updatePassword view, added exception handler, added friends view

solution/pulse/api/users/serializers.py

@@ -1,6 +1,7 @@
+from django.core.validators import RegexValidator
 from rest_framework import serializers
 
-from api.users.models import Profile
+from api.users.models import Friendship, Profile
 
 
 class ProfileSerializer(serializers.ModelSerializer):
@@ -29,6 +30,14 @@ class UpdateProfileSerializer(serializers.ModelSerializer):
             "image",
         ]
 
+    def to_representation(self, instance):
+        data = super().to_representation(instance)
+        if data["image"] is None:
+            del data["image"]
+        if data["phone"] is None:
+            del data["phone"]
+        return data
+
 
 class PublicProfileSerializer(serializers.ModelSerializer):
     class Meta:
@@ -49,3 +58,25 @@ class PublicProfileSerializer(serializers.ModelSerializer):
         if data["phone"] is None:
             del data["phone"]
         return data
+
+
+class FriendshipSerializer(serializers.ModelSerializer):
+    login = serializers.SerializerMethodField()
+
+    class Meta:
+        model = Friendship
+        fields = ["login", "addedAt"]
+
+    def get_login(self, obj):
+        return obj.to_profile.login
+
+
+class PasswordChangeSerializer(serializers.Serializer):
+    # ruff: noqa: N815
+    oldPassword = serializers.CharField(required=True)
+    newPassword = serializers.CharField(
+        required=True,
+        validators=[
+            RegexValidator(r"^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9]).{6,100}$"),
+        ],
+    )