Add an extra endpoint for metadata authorisation.

* gn_auth/auth/authorisation/data/views.py: (metadata_resources): New
end-point for authorising metadata data.
* gn_auth/auth/authorisation/resources/models.py: Import sqlite3.Row.
(__metadata_resource_data__): New function.
(__assign_resource_owner_role__): Add __metadata_resource_data__
to the "resource_data_function" map.

Signed-off-by: Munyoki Kilyungi <me@bonfacemunyoki.com>

2 files changed, 69 insertions, 0 deletions

diff --git a/gn_auth/auth/authorisation/data/views.py b/gn_auth/auth/authorisation/data/views.py
index 05257a7..e5c8fd6 100644
--- a/gn_auth/auth/authorisation/data/views.py
+++ b/gn_auth/auth/authorisation/data/views.py
@@ -334,3 +334,53 @@ def link_phenotype() -> Response:
 
         return jsonify(with_db_connection(
             partial(__link__, **__values__(request.json))))
+
+
+@data.route("/metadata/authorisation", methods=["POST"])
+@require_json
+def metadata_resources() -> Response:
+    """Retrieve the authorisation level for given metadata resources"""
+    db_uri, privileges = app.config["AUTH_DB"], {}
+    user = User(uuid.uuid4(), "anon@ymous.user", "Anonymous User")
+    with db.connection(db_uri) as auth_conn:
+        with require_oauth.acquire("profile group resource") as token:
+            resources = attach_resources_data(
+                auth_conn, user_resources(auth_conn, token.user)
+            )
+            roles = user_resource_roles(
+                auth_conn, token.user
+            )
+            privileges = {
+                    resource_id: tuple(
+                        privilege.privilege_id
+                        for role in roles[resource_id]
+                        for privilege in role.privileges)
+                    for resource_id, is_authorised
+                    in authorised_for(
+                        auth_conn, token.user,
+                        ("group:resource:view-resource",),
+                        tuple(
+                            resource.resource_id for resource
+                            in resources
+                        )
+                    ).items()
+                    if is_authorised
+                } | {
+                    resource.resource_id: ("system:resource:public-read",)
+                    for resource in resources if resource.public
+                }
+            resource_map = {
+                resource.resource_category.resource_category_key.lower():
+                resource.resource_id
+                for resource in resources
+                for item in resource.resource_data
+            }
+            return jsonify(
+                {
+                    "user": user._asdict(),
+                    "resource_id": resource_map.get(
+                        request.json.get("name")  #type: ignore[union-attr]
+                    ),
+                    "privileges": privileges,
+                }
+            )
diff --git a/gn_auth/auth/authorisation/resources/models.py b/gn_auth/auth/authorisation/resources/models.py
index d6e3a1d..3693ad1 100644
--- a/gn_auth/auth/authorisation/resources/models.py
+++ b/gn_auth/auth/authorisation/resources/models.py
@@ -1,6 +1,7 @@
 """Handle the management of resources."""
 from uuid import UUID, uuid4
 from functools import reduce, partial
+from sqlite3 import Row
 from typing import Dict, Sequence, Optional
 
 from gn_auth.auth.db import sqlite3 as db
@@ -35,6 +36,22 @@ from .phenotype import (
 
 from .errors import MissingGroupError
 
+
+def __metadata_resource_data__(
+        cursor: db.DbCursor,
+        resource_id: UUID,
+        offset: int = 0,
+        limit: Optional[int] = None
+) -> Sequence[Row]:
+    """Fetch metadata resources"""
+    cursor.execute(
+        (
+            ("SELECT * FROM metadata_resources as mt \
+WHERE mt.resource_id=?")
+            + (f" LIMIT {limit} OFFSET {offset}" if bool(limit) else "")),
+        (str(resource_id),))
+    return cursor.fetchall()
+
 def __assign_resource_owner_role__(cursor, resource, user, group):
     """Assign `user` the 'Resource Owner' role for `resource`."""
     cursor.execute(
@@ -185,6 +202,7 @@ def resource_data(conn, resource, offset: int = 0, limit: Optional[int] = None)
         "mrna": mrna_resource_data,
         "genotype": genotype_resource_data,
         "phenotype": phenotype_resource_data,
+        "metadata": __metadata_resource_data__,
         "system": lambda *args: tuple(),
         "group": lambda *args: tuple()
     }
@@ -291,6 +309,7 @@ def attach_resources_data(
         "mrna": mrna_attach_resources_data,
         "genotype": genotype_attach_resources_data,
         "phenotype": phenotype_attach_resources_data,
+        "metadata": lambda *args: [],
         "system": lambda *args: [],
         "group": lambda *args: [],
         "inbredset-group": lambda *args: []