IO: Add domain_models.io

.github/workflows/main.yml

@@ -18,6 +18,9 @@ jobs:
     - name: Install dependencies
       run: |
         make install
+    - name: Lint
+      run: |
+        make lint
     - name: Test with pytest
       env:
         AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
@@ -39,9 +42,6 @@ jobs:
         AWS_SAM_STACK_NAME: ${{ secrets.AWS_SAM_STACK_NAME }}
       run: |
         make sambuild
-    - name: Lint
-      run: |
-        make lint
     - name: SAM deploy
       if: success()
       env:

esgtools/domain_models/io.py

@@ -0,0 +1,22 @@
+from dataclasses import dataclass
+
+
+@dataclass
+class SQLParams:
+    """Credentials to an RDS database."""
+
+    dbname: str
+    username: str
+    password: str
+    host: str
+    port: int
+
+
+def convert_dict_to_sql_params(db_credentials: dict) -> SQLParams:
+    filtered_db_credentials = {
+        key: db_credentials[key]
+        for key in SQLParams.__annotations__
+        if key in db_credentials
+    }
+    sql_params = SQLParams(**filtered_db_credentials)
+    return sql_params