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'use strict';
var rpcRequestID = 1,
rpcSessionID = L.env.sessionid || '00000000000000000000000000000000',
rpcBaseURL = L.url('admin/ubus'),
rpcInterceptorFns = [];
return L.Class.extend({
call: function(req, cb) {
var q = '';
if (Array.isArray(req)) {
if (req.length == 0)
return Promise.resolve([]);
for (var i = 0; i < req.length; i++)
q += '%s%s.%s'.format(
q ? ';' : '/',
req[i].params[1],
req[i].params[2]
);
}
else {
q += '/%s.%s'.format(req.params[1], req.params[2]);
}
return L.Request.post(rpcBaseURL + q, req, {
timeout: (L.env.rpctimeout || 5) * 1000,
credentials: true
}).then(cb);
},
handleListReply: function(req, msg) {
var list = msg.result;
/* verify message frame */
if (typeof(msg) != 'object' || msg.jsonrpc != '2.0' || !msg.id || !Array.isArray(list))
list = [ ];
req.resolve(list);
},
parseCallReply: function(req, res) {
var msg = null;
try {
if (!res.ok)
L.raise('RPCError', 'RPC call to %s/%s failed with HTTP error %d: %s',
req.object, req.method, res.status, res.statusText || '?');
msg = res.json();
}
catch (e) {
return req.reject(e);
}
/*
* The interceptor args are intentionally swapped.
* Response is passed as first arg to align with Request class interceptors
*/
Promise.all(rpcInterceptorFns.map(function(fn) { return fn(msg, req) }))
.then(this.handleCallReply.bind(this, req, msg))
.catch(req.reject);
},
handleCallReply: function(req, msg) {
var type = Object.prototype.toString,
ret = null;
try {
/* verify message frame */
if (!L.isObject(msg) || msg.jsonrpc != '2.0')
L.raise('RPCError', 'RPC call to %s/%s returned invalid message frame',
req.object, req.method);
/* check error condition */
if (L.isObject(msg.error) && msg.error.code && msg.error.message)
L.raise('RPCError', 'RPC call to %s/%s failed with error %d: %s',
req.object, req.method, msg.error.code, msg.error.message || '?');
}
catch (e) {
return req.reject(e);
}
if (Array.isArray(msg.result)) {
ret = (msg.result.length > 1) ? msg.result[1] : msg.result[0];
}
if (req.expect) {
for (var key in req.expect) {
if (ret != null && key != '')
ret = ret[key];
if (ret == null || type.call(ret) != type.call(req.expect[key]))
ret = req.expect[key];
break;
}
}
/* apply filter */
if (typeof(req.filter) == 'function') {
req.priv[0] = ret;
req.priv[1] = req.params;
ret = req.filter.apply(this, req.priv);
}
req.resolve(ret);
},
list: function() {
var msg = {
jsonrpc: '2.0',
id: rpcRequestID++,
method: 'list',
params: arguments.length ? this.varargs(arguments) : undefined
};
return this.call(msg, this.handleListReply);
},
declare: function(options) {
return Function.prototype.bind.call(function(rpc, options) {
var args = this.varargs(arguments, 2);
return new Promise(function(resolveFn, rejectFn) {
/* build parameter object */
var p_off = 0;
var params = { };
if (Array.isArray(options.params))
for (p_off = 0; p_off < options.params.length; p_off++)
params[options.params[p_off]] = args[p_off];
/* all remaining arguments are private args */
var priv = [ undefined, undefined ];
for (; p_off < args.length; p_off++)
priv.push(args[p_off]);
/* store request info */
var req = {
expect: options.expect,
filter: options.filter,
resolve: resolveFn,
reject: rejectFn,
params: params,
priv: priv,
object: options.object,
method: options.method
};
/* build message object */
var msg = {
jsonrpc: '2.0',
id: rpcRequestID++,
method: 'call',
params: [
rpcSessionID,
options.object,
options.method,
params
]
};
/* call rpc */
rpc.call(msg, rpc.parseCallReply.bind(rpc, req));
});
}, this, this, options);
},
getSessionID: function() {
return rpcSessionID;
},
setSessionID: function(sid) {
rpcSessionID = sid;
},
getBaseURL: function() {
return rpcBaseURL;
},
setBaseURL: function(url) {
rpcBaseURL = url;
},
getStatusText: function(statusCode) {
switch (statusCode) {
case 0: return _('Command OK');
case 1: return _('Invalid command');
case 2: return _('Invalid argument');
case 3: return _('Method not found');
case 4: return _('Resource not found');
case 5: return _('No data received');
case 6: return _('Permission denied');
case 7: return _('Request timeout');
case 8: return _('Not supported');
case 9: return _('Unspecified error');
case 10: return _('Connection lost');
default: return _('Unknown error code');
}
},
addInterceptor: function(interceptorFn) {
if (typeof(interceptorFn) == 'function')
rpcInterceptorFns.push(interceptorFn);
return interceptorFn;
},
removeInterceptor: function(interceptorFn) {
var oldlen = rpcInterceptorFns.length, i = oldlen;
while (i--)
if (rpcInterceptorFns[i] === interceptorFn)
rpcInterceptorFns.splice(i, 1);
return (rpcInterceptorFns.length < oldlen);
}
});
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