From f51ec09ba865fd2f103baa63b65dc36631d44b51 Mon Sep 17 00:00:00 2001
From: Matthias Mohr <m.mohr@uni-muenster.de>
Date: Thu, 3 Sep 2020 18:27:25 +0200
Subject: [PATCH] Support specifying a path in getCallbackParameters* to
 support load_collection filters.
 https://github.com/Open-EO/openeo-js-processgraphs/issues/5

---
 src/processUtils.js        | 12 +++++++++---
 tests/processUtils.test.js | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+), 3 deletions(-)

diff --git a/src/processUtils.js b/src/processUtils.js
index 63c3017..c7b00e6 100644
--- a/src/processUtils.js
+++ b/src/processUtils.js
@@ -74,12 +74,18 @@ class ProcessUtils {
 	 * @returns {array}
 	 * @throws {Error}
 	 */
-	static getCallbackParameters(processParameter) {
+	static getCallbackParameters(processParameter, keyPath = []) {
 		if (!Utils.isObject(processParameter) || !processParameter.schema) {
 			return [];
 		}
 
 		let schemas = ProcessUtils.normalizeJsonSchema(processParameter.schema);
+		let key;
+		while(key = keyPath.shift()) { // jshint ignore:line
+			schemas = schemas.map(schema => ProcessUtils.normalizeJsonSchema(ProcessUtils.getElementJsonSchema(schema, key))); // jshint ignore:line
+			schemas = schemas.concat(...schemas);
+		}
+
 
 		let cbParams = [];
 		for(let schema of schemas) {
@@ -102,13 +108,13 @@ class ProcessUtils {
 	 * @returns {array}
 	 * @throws {Error}
 	 */
-	static getCallbackParametersForProcess(process, parameterName) {
+	static getCallbackParametersForProcess(process, parameterName, path = []) {
 		if (!Utils.isObject(process) || !Array.isArray(process.parameters)) {
 			return [];
 		}
 
 		let param = process.parameters.find(p => p.name === parameterName);
-		return ProcessUtils.getCallbackParameters(param);
+		return ProcessUtils.getCallbackParameters(param, path);
 	}
 
 	/**
diff --git a/tests/processUtils.test.js b/tests/processUtils.test.js
index 7812392..b19d055 100644
--- a/tests/processUtils.test.js
+++ b/tests/processUtils.test.js
@@ -276,6 +276,38 @@ describe('ProcessProcessUtils Tests', () => {
 				}
 			]
 		})).toThrow();
+
+		let lcParams = [
+			{
+				"name": "value",
+				"description": "The property value to be checked against.",
+				"schema": {
+					"description": "Any data type."
+				}
+			}
+		];
+		let lc = {
+			"name": "properties",
+			"description": "",
+			"schema": [
+				{
+					"type": "object",
+					"subtype": "metadata-filter",
+					"description": "",
+					"additionalProperties": {
+						"type": "object",
+						"subtype": "process-graph",
+						"parameters": lcParams
+					}
+				},
+				{
+					"title": "No filter",
+					"description": "Don't filter by metadata properties.",
+					"type": "null"
+				}
+			]
+		};
+		expect(ProcessUtils.getCallbackParameters(lc, ['eo:cloud_cover'])).toEqual(lcParams);
 	});