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cleaner promises

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pull/272/merge
Marek Kotewicz 10 years ago
parent 66e439b6f4
commit 28d4250866
1 changed files with 137 additions and 276 deletions
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  1. 413
      main.js

413
main.js
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@ -3,6 +3,140 @@
return o instanceof Promise
}
function flattenPromise (obj) {
if (obj instanceof Promise) {
return Promise.resolve(obj);
}
if (obj instanceof Array) {
return new Promise(function (resolve) {
var promises = obj.map(function (o) {
return flattenPromise(o);
});
return Promise.all(promises).then(function (res) {
for (var i = 0; i < obj.length; i++) {
obj[i] = res[i];
}
resolve(obj);
});
});
}
if (obj instanceof Object) {
return new Promise(function (resolve) {
var keys = Object.keys(obj);
var promises = keys.map(function (key) {
return flattenPromise(obj[key]);
});
return Promise.all(promises).then(function (res) {
for (var i = 0; i < keys.length; i++) {
obj[keys[i]] = res[i];
}
resolve(obj);
});
});
}
return Promise.resolve(obj);
};
var ethMethods = function () {
var blockCall = function (args) {
return typeof args[0] === "string" ? "blockByHash" : "blockByNumber";
};
var transactionCall = function (args) {
return typeof args[0] === "string" ? 'transactionByHash' : 'transactonByNumber';
};
var uncleCall = function (args) {
return typeof args[0] === "string" ? 'uncleByHash' : 'uncleByNumber';
};
var methods = [
{ name: 'balanceAt', call: 'balanceAt' },
{ name: 'stateAt', call: 'stateAt' },
{ name: 'countAt', call: 'countAt'},
{ name: 'codeAt', call: 'codeAt' },
{ name: 'transact', call: 'transact' },
{ name: 'call', call: 'call' },
{ name: 'block', call: blockCall },
{ name: 'transaction', call: transactionCall },
{ name: 'uncle', call: uncleCall },
{ name: 'compile', call: 'compile' }
];
return methods;
};
var ethProperties = function () {
return [
{ name: 'coinbase', getter: 'coinbase', setter: 'setCoinbase' },
{ name: 'listening', getter: 'listening', setter: 'setListening' },
{ name: 'mining', getter: 'mining', setter: 'setMining' },
{ name: 'gasPrice', getter: 'gasPrice' },
{ name: 'accounts', getter: 'accounts' },
{ name: 'peerCount', getter: 'peerCount' },
{ name: 'defaultBlock', getter: 'defaultBlock', setter: 'setDefaultBlock' },
{ name: 'number', getter: 'number'}
];
};
var setupMethods = function (obj, methods) {
methods.forEach(function (method) {
obj[method.name] = function () {
return flattenPromise(Array.prototype.slice.call(arguments)).then(function (args) {
var call = typeof method.call === "function" ? method.call(args) : method.call;
return {call: call, args: args};
}).then(function (request) {
return new Promise(function (resolve, reject) {
web3.provider.send(request, function (result) {
if (result) {
resolve(result);
} else {
reject(result);
}
});
});
}).catch(function( err) {
console.error(err);
});
};
});
};
var setupProperties = function (obj, properties) {
properties.forEach(function (property) {
var proto = {};
proto.get = function () {
return new Promise(function(resolve, reject) {
web3.provider.send({call: property.getter}, function(result) {
resolve(result);
});
});
};
if (property.setter) {
proto.set = function (val) {
return flattenPromise([val]).then(function (args) {
return new Promise(function (resolve) {
web3.provider.send({call: property.setter, args: args}, function (result) {
if (result) {
resolve(result);
} else {
reject(result);
}
});
});
}).catch(function (err) {
console.error(err);
});
}
}
Object.defineProperty(obj, property.name, proto);
});
};
var web3 = {
_callbacks: {},
_events: {},
@ -48,235 +182,6 @@
eth: {
prototype: Object(),
block: function(numberOrHash) {
return new Promise(function(resolve, reject) {
var call = typeof numberOrHash === "string" ? 'blockByHash' : 'blockByNumber';
web3.provider.send({call: call, args: [numberOrHash]}, function(block) {
if(block)
resolve(block);
else
reject("not found");
});
});
},
transaction: function(numberOrHash, nth) {
return new Promise(function(resolve, reject) {
var call = typeof numberOrHash === "string" ? 'transactionByHash' : 'transactonByNumber';
web3.provider.send({call: call, args: [numberOrHash, nth]}, function(block) {
if(block)
resolve(block);
else
reject("not found");
});
});
},
uncle: function(numberOrHash, nth) {
return new Promise(function(resolve, reject) {
var call = typeof numberOrHash === "string" ? 'uncleByHash' : 'uncleByNumber';
web3.provider.send({call: call, args: [numberOrHash, nth]}, function(block) {
if(block)
resolve(block);
else
reject("not found");
});
});
},
transact: function(params) {
if(params === undefined) {
params = {};
}
if(params.endowment !== undefined)
params.value = params.endowment;
if(params.code !== undefined)
params.data = params.code;
var promises = []
if(isPromise(params.to)) {
promises.push(params.to.then(function(_to) { params.to = _to; }));
}
if(isPromise(params.from)) {
promises.push(params.from.then(function(_from) { params.from = _from; }));
}
if(typeof params.data !== "object" || isPromise(params.data)) {
params.data = [params.data]
}
var data = params.data;
for(var i = 0; i < params.data.length; i++) {
if(isPromise(params.data[i])) {
var promise = params.data[i];
var _i = i;
promises.push(promise.then(function(_arg) { params.data[_i] = _arg; }));
}
}
// Make sure everything is string
var fields = ["value", "gas", "gasPrice"];
for(var i = 0; i < fields.length; i++) {
if(params[fields[i]] === undefined) {
params[fields[i]] = "";
}
params[fields[i]] = params[fields[i]].toString();
}
// Load promises then call the last "transact".
return Promise.all(promises).then(function() {
return new Promise(function(resolve, reject) {
params.data = params.data.join("");
web3.provider.send({call: "transact", args: [params]}, function(data) {
if(data[1])
reject(data[0]);
else
resolve(data[0]);
});
});
})
},
compile: function(code) {
return new Promise(function(resolve, reject) {
web3.provider.send({call: "compile", args: [code]}, function(data) {
if(data[1])
reject(data[0]);
else
resolve(data[0]);
});
});
},
balanceAt: function(address) {
var promises = [];
if(isPromise(address)) {
promises.push(address.then(function(_address) { address = _address; }));
}
return Promise.all(promises).then(function() {
return new Promise(function(resolve, reject) {
web3.provider.send({call: "balanceAt", args: [address]}, function(balance) {
resolve(balance);
});
});
});
},
countAt: function(address) {
var promises = [];
if(isPromise(address)) {
promises.push(address.then(function(_address) { address = _address; }));
}
return Promise.all(promises).then(function() {
return new Promise(function(resolve, reject) {
web3.provider.send({call: "countAt", args: [address]}, function(count) {
resolve(count);
});
});
});
},
codeAt: function(address) {
var promises = [];
if(isPromise(address)) {
promises.push(address.then(function(_address) { address = _address; }));
}
return Promise.all(promises).then(function() {
return new Promise(function(resolve, reject) {
web3.provider.send({call: "codeAt", args: [address]}, function(code) {
resolve(code);
});
});
});
},
storageAt: function(address, storageAddress) {
var promises = [];
if(isPromise(address)) {
promises.push(address.then(function(_address) { address = _address; }));
}
if(isPromise(storageAddress)) {
promises.push(storageAddress.then(function(_sa) { storageAddress = _sa; }));
}
return Promise.all(promises).then(function() {
return new Promise(function(resolve, reject) {
web3.provider.send({call: "stateAt", args: [address, storageAddress]}, function(entry) {
resolve(entry);
});
});
});
},
stateAt: function(address, storageAddress) {
return this.storageAt(address, storageAddress);
},
call: function(params) {
if(params === undefined) {
params = {};
}
if(params.endowment !== undefined)
params.value = params.endowment;
if(params.code !== undefined)
params.data = params.code;
var promises = []
if(isPromise(params.to)) {
promises.push(params.to.then(function(_to) { params.to = _to; }));
}
if(isPromise(params.from)) {
promises.push(params.from.then(function(_from) { params.from = _from; }));
}
if(isPromise(params.data)) {
promises.push(params.data.then(function(_code) { params.data = _code; }));
} else {
if(typeof params.data === "object") {
data = "";
for(var i = 0; i < params.data.length; i++) {
data += params.data[i]
}
} else {
data = params.data;
}
}
// Make sure everything is string
var fields = ["value", "gas", "gasPrice"];
for(var i = 0; i < fields.length; i++) {
if(params[fields[i]] === undefined) {
params[fields[i]] = "";
}
params[fields[i]] = params[fields[i]].toString();
}
// Load promises then call the last "transact".
return Promise.all(promises).then(function() {
return new Promise(function(resolve, reject) {
web3.provider.send({call: "call", args: params}, function(data) {
if(data[1])
reject(data[0]);
else
resolve(data[0]);
});
});
})
},
watch: function(params) {
return new Filter(params);
},
@ -322,53 +227,8 @@
};
var eth = web3.eth;
// Eth object properties
Object.defineProperty(eth, "gasPrice", {
get: function() {
return "10000000000000"
}
});
Object.defineProperty(eth, "coinbase", {
get: function() {
return new Promise(function(resolve, reject) {
web3.provider.send({call: "coinbase"}, function(coinbase) {
resolve(coinbase);
});
});
},
});
Object.defineProperty(eth, "listening", {
get: function() {
return new Promise(function(resolve, reject) {
web3.provider.send({call: "listening"}, function(listening) {
resolve(listening);
});
});
},
});
Object.defineProperty(eth, "mining", {
get: function() {
return new Promise(function(resolve, reject) {
web3.provider.send({call: "mining"}, function(mining) {
resolve(mining);
});
});
},
});
Object.defineProperty(eth, "peerCount", {
get: function() {
return new Promise(function(resolve, reject) {
web3.provider.send({call: "peerCount"}, function(peerCount) {
resolve(peerCount);
});
});
},
});
setupMethods(eth, ethMethods());
setupProperties(eth, ethProperties());
var ProviderManager = function() {
this.queued = [];
@ -549,4 +409,5 @@
*/
window.web3 = web3;
})(this);

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