feat(api): add API endpoints to add DCA entries and strategies

app/apps/api/serializers/dca.py

@@ -0,0 +1,79 @@
+from rest_framework import serializers
+from apps.dca.models import DCAEntry, DCAStrategy
+
+
+class DCAEntrySerializer(serializers.ModelSerializer):
+    profit_loss = serializers.DecimalField(
+        max_digits=42, decimal_places=30, read_only=True
+    )
+    profit_loss_percentage = serializers.DecimalField(
+        max_digits=42, decimal_places=30, read_only=True
+    )
+    current_value = serializers.DecimalField(
+        max_digits=42, decimal_places=30, read_only=True
+    )
+    entry_price = serializers.DecimalField(
+        max_digits=42, decimal_places=30, read_only=True
+    )
+
+    class Meta:
+        model = DCAEntry
+        fields = [
+            "id",
+            "strategy",
+            "date",
+            "amount_paid",
+            "amount_received",
+            "notes",
+            "created_at",
+            "updated_at",
+            "profit_loss",
+            "profit_loss_percentage",
+            "current_value",
+            "entry_price",
+        ]
+        read_only_fields = ["created_at", "updated_at"]
+
+
+class DCAStrategySerializer(serializers.ModelSerializer):
+    entries = DCAEntrySerializer(many=True, read_only=True)
+    total_invested = serializers.DecimalField(
+        max_digits=42, decimal_places=30, read_only=True
+    )
+    total_received = serializers.DecimalField(
+        max_digits=42, decimal_places=30, read_only=True
+    )
+    average_entry_price = serializers.DecimalField(
+        max_digits=42, decimal_places=30, read_only=True
+    )
+    total_entries = serializers.IntegerField(read_only=True)
+    current_total_value = serializers.DecimalField(
+        max_digits=42, decimal_places=30, read_only=True
+    )
+    total_profit_loss = serializers.DecimalField(
+        max_digits=42, decimal_places=30, read_only=True
+    )
+    total_profit_loss_percentage = serializers.DecimalField(
+        max_digits=42, decimal_places=30, read_only=True
+    )
+
+    class Meta:
+        model = DCAStrategy
+        fields = [
+            "id",
+            "name",
+            "target_currency",
+            "payment_currency",
+            "notes",
+            "created_at",
+            "updated_at",
+            "entries",
+            "total_invested",
+            "total_received",
+            "average_entry_price",
+            "total_entries",
+            "current_total_value",
+            "total_profit_loss",
+            "total_profit_loss_percentage",
+        ]
+        read_only_fields = ["created_at", "updated_at"]