Validate category creation requests, unit test (#15)

* Validate category creation requests, unit test

* unit tests

frog_api/serializers/model_serializers.py

@@ -0,0 +1,45 @@
+from rest_framework import serializers
+
+from frog_api.models import Entry, Measure, Project, Version
+
+
+class VersionSerializer(serializers.HyperlinkedModelSerializer):
+    class Meta:
+        model = Version
+        fields = ["slug", "name"]
+
+
+class ProjectSerializer(serializers.HyperlinkedModelSerializer):
+    versions = VersionSerializer(many=True)
+
+    class Meta:
+        model = Project
+        fields = [
+            "slug",
+            "name",
+            "versions",
+            "repository",
+            "discord",
+            "website",
+        ]
+
+
+class MeasureSerializer(serializers.HyperlinkedModelSerializer):
+    class Meta:
+        model = Measure
+        fields = ["type", "value"]
+
+
+class EntrySerializer(serializers.HyperlinkedModelSerializer):
+    measures = serializers.SerializerMethodField()
+
+    def get_measures(self, instance: Entry) -> dict[str, int]:
+        return {m.type: m.value for m in instance.measures.all()}
+
+    class Meta:
+        model = Entry
+        fields = [
+            "timestamp",
+            "git_hash",
+            "measures",
+        ]

frog_api/serializers/request_serializers.py

@@ -0,0 +1,14 @@
+from rest_framework import serializers
+from frog_api.models import AUTH_KEY_LEN
+
+
+class ApiKeySerializer(serializers.CharField):
+    required = True
+    max_length = AUTH_KEY_LEN
+
+
+class CreateCategoriesSerializer(serializers.Serializer):  # type:ignore
+    api_key = ApiKeySerializer()
+    categories = serializers.DictField(
+        required=True, allow_empty=False, child=serializers.CharField()
+    )