4 files changed, 152 insertions, 0 deletions
diff --git a/db/rest/comment/api_comment.sql b/db/rest/comment/api_comment.sql
new file mode 100644
index 0000000..e50ca2f
--- /dev/null
+++ b/db/rest/comment/api_comment.sql
@@ -0,0 +1,15 @@
+CREATE VIEW api.comment AS
+	SELECT
+		c.id,
+		c.user_id,
+		c.post_id,
+		c.content,
+		c.date
+	FROM
+		admin.comment c
+	ORDER BY id ASC;
+
+GRANT SELECT ON TABLE api.comment
+	TO rest_anon, rest_user;
+GRANT SELECT ON TABLE admin.comment
+	TO rest_anon, rest_user;
diff --git a/db/rest/comment/api_comment_delete.sql b/db/rest/comment/api_comment_delete.sql
new file mode 100644
index 0000000..d7db8a4
--- /dev/null
+++ b/db/rest/comment/api_comment_delete.sql
@@ -0,0 +1,31 @@
+CREATE FUNCTION _api.comment_delete()
+RETURNS TRIGGER
+LANGUAGE plpgsql VOLATILE
+AS $BODY$
+DECLARE
+	_user_id INTEGER;
+BEGIN
+	_user_id = _api.get_user_id();
+
+	IF OLD.user_id <> _user_id THEN
+		PERFORM _api.raise_deny();
+	END IF;
+
+	DELETE FROM admin.comment
+	WHERE user_id = _user_id
+	AND id = OLD.id;
+END
+$BODY$;
+
+GRANT EXECUTE ON FUNCTION _api.comment_delete()
+	TO rest_user;
+GRANT DELETE ON TABLE api.comment
+	TO rest_user;
+GRANT DELETE ON TABLE admin.comment
+	TO rest_user;
+
+CREATE TRIGGER api_comment_delete_trgr
+	INSTEAD OF DELETE
+			ON api.comment
+			FOR EACH ROW
+				EXECUTE PROCEDURE _api.comment_delete();
diff --git a/db/rest/comment/api_comment_insert.sql b/db/rest/comment/api_comment_insert.sql
new file mode 100644
index 0000000..878e194
--- /dev/null
+++ b/db/rest/comment/api_comment_insert.sql
@@ -0,0 +1,56 @@
+CREATE FUNCTION _api.comment_insert()
+RETURNS TRIGGER
+LANGUAGE plpgsql VOLATILE
+AS $BODY$
+DECLARE
+	_user_id INTEGER;
+BEGIN
+	_user_id = _api.get_user_id();
+
+	NEW.content	:= _api.trim(NEW.content);
+	PERFORM _api.validate_text(
+		_text => NEW.content,
+		_column => 'content',
+		_min => 1,
+		_max => 1024
+	);
+
+	PERFORM TRUE
+	FROM admin.post
+	WHERE id = NEW.post_id;
+
+	IF NOT FOUND THEN
+		PERFORM _api.raise(
+			_msg => 'api_null_post',
+			_err => 400
+		);
+	END IF;
+
+	INSERT INTO admin.comment (
+		user_id,
+		post_id,
+		content
+	) VALUES (
+		_user_id,
+		NEW.post_id,
+		NEW.content
+	);
+
+	RETURN NEW;
+END
+$BODY$;
+
+GRANT EXECUTE ON FUNCTION _api.comment_insert()
+	TO rest_user;
+GRANT INSERT ON TABLE api.comment
+	TO rest_user;
+GRANT INSERT ON TABLE admin.comment
+	TO rest_user;
+GRANT UPDATE ON TABLE sys.comment_id_seq
+	TO rest_user;
+
+CREATE TRIGGER api_comment_insert_trgr
+	INSTEAD OF INSERT
+			ON api.comment
+			FOR EACH ROW
+				EXECUTE PROCEDURE _api.comment_insert();
diff --git a/db/rest/comment/api_comment_update.sql b/db/rest/comment/api_comment_update.sql
new file mode 100644
index 0000000..d6b4aca
--- /dev/null
+++ b/db/rest/comment/api_comment_update.sql
@@ -0,0 +1,50 @@
+CREATE FUNCTION _api.comment_update()
+RETURNS TRIGGER
+LANGUAGE plpgsql VOLATILE
+AS $BODY$
+DECLARE
+	_user_id INTEGER;
+	_changed BOOLEAN;
+BEGIN
+	_user_id = _api.get_user_id();
+	_changed = FALSE;
+
+	IF OLD.user_id <> _user_id THEN
+		PERFORM _api.raise_deny();
+	END IF;
+
+	NEW.content = COALESCE(NEW.content, OLD.content);
+	NEW.content := _api.trim(NEW.content);
+	PERFORM _api.validate_text(
+		_text => NEW.content,
+		_column => 'content',
+		_min => 1,
+		_max => 1024
+	);
+
+	IF NEW.content IS DISTINCT FROM OLD.content THEN
+		_changed = TRUE;
+	END IF;
+
+	IF _changed THEN
+		UPDATE admin.comment
+			SET content = NEW.content
+			WHERE id = OLD.id;
+	END IF;
+
+	RETURN NEW;
+END
+$BODY$;
+
+GRANT EXECUTE ON FUNCTION _api.comment_update()
+	TO rest_user;
+GRANT UPDATE ON TABLE api.comment
+	TO rest_user;
+GRANT UPDATE ON TABLE admin.comment
+	TO rest_user;
+
+CREATE TRIGGER api_comment_update_trgr
+	INSTEAD OF UPDATE
+			ON api.comment
+			FOR EACH ROW
+				EXECUTE PROCEDURE _api.comment_update();