Refactor API Schema and validation

- /schema now returns full openapi/swagger schema
- That schema is used to validate incoming requests
- And used as a contract in future integration tests
- Moved route files up one level
- Fixed incorrect 404 reponses when getting objects
- Fixed saving new objects and passing jsonschemavalidation

backend/routes/audit-log.js

@@ -0,0 +1,52 @@
+const express          = require('express');
+const validator        = require('../lib/validator');
+const jwtdecode        = require('../lib/express/jwt-decode');
+const internalAuditLog = require('../internal/audit-log');
+
+let router = express.Router({
+	caseSensitive: true,
+	strict:        true,
+	mergeParams:   true
+});
+
+/**
+ * /api/audit-log
+ */
+router
+	.route('/')
+	.options((_, res) => {
+		res.sendStatus(204);
+	})
+	.all(jwtdecode())
+
+	/**
+	 * GET /api/audit-log
+	 *
+	 * Retrieve all logs
+	 */
+	.get((req, res, next) => {
+		validator({
+			additionalProperties: false,
+			properties:           {
+				expand: {
+					$ref: 'common#/definitions/expand'
+				},
+				query: {
+					$ref: 'common#/definitions/query'
+				}
+			}
+		}, {
+			expand: (typeof req.query.expand === 'string' ? req.query.expand.split(',') : null),
+			query:  (typeof req.query.query === 'string' ? req.query.query : null)
+		})
+			.then((data) => {
+				return internalAuditLog.getAll(res.locals.access, data.expand, data.query);
+			})
+			.then((rows) => {
+				res.status(200)
+					.send(rows);
+			})
+			.catch(next);
+	});
+
+module.exports = router;