From 601c4ee01e21f4da3fc615196d21fde72bfbaee9 Mon Sep 17 00:00:00 2001
From: Jo-Philipp Wich <jo@mein.io>
Date: Sun, 19 Jan 2020 16:00:57 +0100
Subject: luci-base: form.js: add a new "contains" dependency mode

By tagging option dependencies with `!contains`, dependencies are
considered satisfied when the value is contained in the value of
a related field, instead of being equal to it.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>
---
 .../luci-base/htdocs/luci-static/resources/form.js | 30 +++++++++++++++++++---
 1 file changed, 26 insertions(+), 4 deletions(-)

diff --git a/modules/luci-base/htdocs/luci-static/resources/form.js b/modules/luci-base/htdocs/luci-static/resources/form.js
index 88e566519c..4ce5e45ebe 100644
--- a/modules/luci-base/htdocs/luci-static/resources/form.js
+++ b/modules/luci-base/htdocs/luci-static/resources/form.js
@@ -403,11 +403,12 @@ var CBIMap = CBINode.extend({
 
 		for (var i = 0; i < depends.length; i++) {
 			var istat = true,
-			    reverse = false;
+			    reverse = depends[i]['!reverse'],
+			    contains = depends[i]['!contains'];
 
 			for (var dep in depends[i]) {
-				if (dep == '!reverse') {
-					reverse = true;
+				if (dep == '!reverse' || dep == '!contains') {
+					continue;
 				}
 				else if (dep == '!default') {
 					def = true;
@@ -417,7 +418,11 @@ var CBIMap = CBINode.extend({
 					var res = this.lookupOption(dep, section_id, config_name),
 					    val = (res && res[0].isActive(res[1])) ? res[0].formvalue(res[1]) : null;
 
-					istat = (istat && isEqual(val, depends[i][dep]));
+					var equal = contains
+						? isContained(val, depends[i][dep])
+						: isEqual(val, depends[i][dep]);
+
+					istat = (istat && equal);
 				}
 			}
 
@@ -633,6 +638,23 @@ var isEqual = function(x, y) {
 	return true;
 };
 
+var isContained = function(x, y) {
+	if (Array.isArray(x)) {
+		for (var i = 0; i < x.length; i++)
+			if (x[i] == y)
+				return true;
+	}
+	else if (L.isObject(x)) {
+		if (x.hasOwnProperty(y) && x[y] != null)
+			return true;
+	}
+	else if (typeof(x) == 'string') {
+		return (x.indexOf(y) > -1);
+	}
+
+	return false;
+};
+
 var CBIAbstractValue = CBINode.extend({
 	__init__: function(map, section, option /*, ... */) {
 		this.super('__init__', this.varargs(arguments, 3));
-- 
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