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'use strict';
var rpcRequestRegistry = {},
rpcRequestBatch = null,
rpcRequestID = 1,
rpcSessionID = L.env.sessionid || '00000000000000000000000000000000';
return L.Class.extend({
call: function(req, cbFn) {
var cb = cbFn.bind(this, req),
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(L.url('admin/ubus') + 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);
},
handleCallReply: function(reqs, res) {
var type = Object.prototype.toString,
data = [],
msg = null;
if (!res.ok)
L.error('RPCError', 'RPC call failed with HTTP error %d: %s',
res.status, res.statusText || '?');
msg = res.json();
if (!Array.isArray(reqs)) {
msg = [ msg ];
reqs = [ reqs ];
}
for (var i = 0; i < msg.length; i++) {
/* fetch related request info */
var req = rpcRequestRegistry[reqs[i].id];
if (typeof(req) != 'object')
throw 'No related request for JSON response';
/* fetch response attribute and verify returned type */
var ret = undefined;
/* verify message frame */
if (typeof(msg[i]) == 'object' && msg[i].jsonrpc == '2.0') {
if (typeof(msg[i].error) == 'object' && msg[i].error.code && msg[i].error.message)
req.reject(new Error('RPC call failed with error %d: %s'
.format(msg[i].error.code, msg[i].error.message || '?')));
else if (Array.isArray(msg[i].result) && msg[i].result[0] == 0)
ret = (msg[i].result.length > 1) ? msg[i].result[1] : msg[i].result[0];
}
else {
req.reject(new Error('Invalid message frame received'));
}
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);
/* store response data */
if (typeof(req.index) == 'number')
data[req.index] = ret;
else
data = ret;
/* delete request object */
delete rpcRequestRegistry[reqs[i].id];
}
return Promise.resolve(data);
},
list: function() {
var msg = {
jsonrpc: '2.0',
id: rpcRequestID++,
method: 'list',
params: arguments.length ? this.varargs(arguments) : undefined
};
return this.call(msg, this.handleListReply);
},
batch: function() {
if (!Array.isArray(rpcRequestBatch))
rpcRequestBatch = [ ];
},
flush: function() {
if (!Array.isArray(rpcRequestBatch))
return Promise.resolve([]);
var req = rpcRequestBatch;
rpcRequestBatch = null;
/* call rpc */
return this.call(req, this.handleCallReply);
},
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 = rpcRequestRegistry[rpcRequestID] = {
expect: options.expect,
filter: options.filter,
resolve: resolveFn,
reject: rejectFn,
params: params,
priv: priv
};
/* build message object */
var msg = {
jsonrpc: '2.0',
id: rpcRequestID++,
method: 'call',
params: [
rpcSessionID,
options.object,
options.method,
params
]
};
/* when a batch is in progress then store index in request data
* and push message object onto the stack */
if (Array.isArray(rpcRequestBatch))
req.index = rpcRequestBatch.push(msg) - 1;
/* call rpc */
else
rpc.call(msg, rpc.handleCallReply);
});
}, this, this, options);
},
setSessionID: function(sid) {
rpcSessionID = sid;
}
});
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