feat: add billing switch. (#1789)

Co-authored-by: StyleZhang <jasonapring2015@outlook.com>

api/services/feature_service.py

@@ -0,0 +1,71 @@
+from pydantic import BaseModel
+from flask import current_app
+
+from services.billing_service import BillingService
+
+
+class SubscriptionModel(BaseModel):
+    plan: str = 'sandbox'
+    interval: str = ''
+
+
+class BillingModel(BaseModel):
+    enabled: bool = False
+    subscription: SubscriptionModel = SubscriptionModel()
+
+
+class LimitationModel(BaseModel):
+    size: int = 0
+    limit: int = 0
+
+
+class FeatureModel(BaseModel):
+    billing: BillingModel = BillingModel()
+    members: LimitationModel = LimitationModel(size=0, limit=1)
+    apps: LimitationModel = LimitationModel(size=0, limit=10)
+    vector_space: LimitationModel = LimitationModel(size=0, limit=5)
+    annotation_quota_limit: LimitationModel = LimitationModel(size=0, limit=10)
+    docs_processing: str = 'standard'
+    can_replace_logo: bool = False
+
+
+class FeatureService:
+
+    @classmethod
+    def get_features(cls, tenant_id: str) -> FeatureModel:
+        features = FeatureModel()
+
+        cls._fulfill_params_from_env(features)
+
+        if current_app.config['BILLING_ENABLED']:
+            cls._fulfill_params_from_billing_api(features, tenant_id)
+
+        return features
+
+    @classmethod
+    def _fulfill_params_from_env(cls, features: FeatureModel):
+        features.can_replace_logo = current_app.config['CAN_REPLACE_LOGO']
+
+    @classmethod
+    def _fulfill_params_from_billing_api(cls, features: FeatureModel, tenant_id: str):
+        billing_info = BillingService.get_info(tenant_id)
+
+        features.billing.enabled = billing_info['enabled']
+        features.billing.subscription.plan = billing_info['subscription']['plan']
+        features.billing.subscription.interval = billing_info['subscription']['interval']
+
+        features.members.size = billing_info['members']['size']
+        features.members.limit = billing_info['members']['limit']
+
+        features.apps.size = billing_info['apps']['size']
+        features.apps.limit = billing_info['apps']['limit']
+
+        features.vector_space.size = billing_info['vector_space']['size']
+        features.vector_space.limit = billing_info['vector_space']['limit']
+
+        features.annotation_quota_limit.size = billing_info['annotation_quota_limit']['size']
+        features.annotation_quota_limit.limit = billing_info['annotation_quota_limit']['limit']
+
+        features.docs_processing = billing_info['docs_processing']
+        features.can_replace_logo = billing_info['can_replace_logo']
+