luci-base: rpc.js: add ability to reject nonzero ubus statuses

Add a new declare option `reject` which makes the generated RPC call
function reject with an error in case the remote ubus call returned
a non-zero status.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

1 files changed, 10 insertions, 1 deletions

diff --git a/modules/luci-base/htdocs/luci-static/resources/rpc.js b/modules/luci-base/htdocs/luci-static/resources/rpc.js
index 20b77c18fc..7bfc913367 100644
--- a/modules/luci-base/htdocs/luci-static/resources/rpc.js
+++ b/modules/luci-base/htdocs/luci-static/resources/rpc.js
@@ -93,6 +93,10 @@ return baseclass.extend(/** @lends LuCI.rpc.prototype */ {
 			ret = msg.result;
 		}
 		else if (Array.isArray(msg.result)) {
+			if (req.raise && msg.result[0] !== 0)
+				L.raise('RPCError', 'RPC call to %s/%s failed with ubus code %d: %s',
+					req.object, req.method, msg.result[0], this.getStatusText(msg.result[0]));
+
 			ret = (msg.result.length > 1) ? msg.result[1] : msg.result[0];
 		}
 
@@ -228,6 +232,10 @@ return baseclass.extend(/** @lends LuCI.rpc.prototype */ {
 	 * Specfies an optional filter function which is invoked to transform the
 	 * received reply data before it is returned to the caller.
 	 *
+	 * @property {boolean} [reject=false]
+	 * If set to `true`, non-zero ubus call status codes are treated as fatal
+	 * error and lead to the rejection of the call promise. The default
+	 * behaviour is to resolve with the call return code value instead.
 	 */
 
 	/**
@@ -316,7 +324,8 @@ return baseclass.extend(/** @lends LuCI.rpc.prototype */ {
 					params:  params,
 					priv:    priv,
 					object:  options.object,
-					method:  options.method
+					method:  options.method,
+					raise:   options.reject
 				};
 
 				/* build message object */