embark-area-51/js/embark.js

396 lines
9.2 KiB
JavaScript

var Promise = require('bluebird');
//var Ipfs = require('./ipfs.js');
var EmbarkJS = {
};
EmbarkJS.Contract = function(options) {
var self = this;
var i, abiElement;
this.abi = options.abi;
this.address = options.address;
this.code = options.code;
this.web3 = options.web3 || web3;
var ContractClass = this.web3.eth.contract(this.abi);
this.eventList = [];
if (this.abi) {
for (i = 0; i < this.abi.length; i++) {
abiElement = this.abi[i];
if (abiElement.type === 'event') {
this.eventList.push(abiElement.name);
}
}
}
var messageEvents = function() {
this.cb = function() {};
};
messageEvents.prototype.then = function(cb) {
this.cb = cb;
};
messageEvents.prototype.error = function(err) {
return err;
};
this._originalContractObject = ContractClass.at(this.address);
this._methods = Object.getOwnPropertyNames(this._originalContractObject).filter(function (p) {
// TODO: check for forbidden properties
if (self.eventList.indexOf(p) >= 0) {
self[p] = function() {
var promise = new messageEvents();
var args = Array.prototype.slice.call(arguments);
args.push(function(err, result) {
if (err) {
promise.error(err);
} else {
promise.cb(result);
}
});
self._originalContractObject[p].apply(self._originalContractObject[p], args);
return promise;
};
return true;
} else if (typeof self._originalContractObject[p] === 'function') {
self[p] = Promise.promisify(self._originalContractObject[p]);
return true;
}
return false;
});
};
EmbarkJS.Contract.prototype.deploy = function(args) {
var self = this;
var contractParams;
contractParams = args || [];
contractParams.push({
from: this.web3.eth.accounts[0],
data: this.code,
gas: 500000,
gasPrice: 10000000000000
});
var contractObject = this.web3.eth.contract(this.abi);
var promise = new Promise(function(resolve, reject) {
contractParams.push(function(err, transaction) {
console.log("callback");
if (err) {
console.log("error");
reject(err);
} else if (transaction.address !== undefined) {
console.log("address contract: " + transaction.address);
resolve(new EmbarkJS.Contract({abi: self.abi, code: self.code, address: transaction.address}));
}
});
console.log(contractParams);
// returns promise
// deploys contract
// wraps it around EmbarkJS.Contract
contractObject["new"].apply(contractObject, contractParams);
});
return promise;
};
EmbarkJS.IPFS = 'ipfs';
EmbarkJS.Storage = {
};
// EmbarkJS.Storage.setProvider('ipfs',{server: 'localhost', port: '5001'})
EmbarkJS.Storage.setProvider = function(provider, options) {
if (provider === 'ipfs') {
this.currentStorage = EmbarkJS.Storage.IPFS;
if (options === undefined) {
this.ipfsConnection = IpfsApi('localhost', '5001');
} else {
this.ipfsConnection = IpfsApi(options.server, options.port);
}
} else {
throw Error('unknown provider');
}
};
EmbarkJS.Storage.saveText = function(text) {
var self = this;
if (!this.ipfsConnection) {
this.setProvider('ipfs');
}
var promise = new Promise(function(resolve, reject) {
self.ipfsConnection.add((new self.ipfsConnection.Buffer(text)), function(err, result) {
if (err) {
reject(err);
} else {
resolve(result[0].path);
}
});
});
return promise;
};
EmbarkJS.Storage.uploadFile = function(inputSelector) {
var self = this;
var file = inputSelector[0].files[0];
if (file === undefined) {
throw new Error('no file found');
}
if (!this.ipfsConnection) {
this.setProvider('ipfs');
}
var promise = new Promise(function(resolve, reject) {
var reader = new FileReader();
reader.onloadend = function() {
var fileContent = reader.result;
var buffer = self.ipfsConnection.Buffer.from(fileContent);
self.ipfsConnection.add(buffer, function(err, result) {
if (err) {
reject(err);
} else {
resolve(result[0].path);
}
});
};
reader.readAsArrayBuffer(file);
});
return promise;
};
EmbarkJS.Storage.get = function(hash) {
var self = this;
// TODO: detect type, then convert if needed
//var ipfsHash = web3.toAscii(hash);
if (!this.ipfsConnection) {
this.setProvider('ipfs');
}
var promise = new Promise(function(resolve, reject) {
self.ipfsConnection.object.get([hash]).then(function(node) {
resolve(node.data);
});
});
return promise;
};
EmbarkJS.Storage.getUrl = function(hash) {
//var ipfsHash = web3.toAscii(hash);
return 'http://localhost:8080/ipfs/' + hash;
};
EmbarkJS.Messages = {
};
EmbarkJS.Messages.setProvider = function(provider, options) {
var ipfs;
if (provider === 'whisper') {
this.currentMessages = EmbarkJS.Messages.Whisper;
this.currentMessages.identity = web3.shh.newIdentity();
} else if (provider === 'orbit') {
this.currentMessages = EmbarkJS.Messages.Orbit;
if (options === undefined) {
ipfs = HaadIpfsApi('localhost', '5001');
} else {
ipfs = HaadIpfsApi(options.server, options.port);
}
this.currentMessages.orbit = new Orbit(ipfs);
this.currentMessages.orbit.connect(web3.eth.accounts[0]);
} else {
throw Error('unknown provider');
}
};
EmbarkJS.Messages.sendMessage = function(options) {
return this.currentMessages.sendMessage(options);
};
EmbarkJS.Messages.listenTo = function(options) {
return this.currentMessages.listenTo(options);
};
EmbarkJS.Messages.Whisper = {
};
EmbarkJS.Messages.Whisper.sendMessage = function(options) {
var topics = options.topic || options.topics;
var data = options.data || options.payload;
var identity = options.identity || this.identity || web3.shh.newIdentity();
var ttl = options.ttl || 100;
var priority = options.priority || 1000;
if (topics === undefined) {
throw new Error("missing option: topic");
}
if (data === undefined) {
throw new Error("missing option: data");
}
// do fromAscii to each topics unless it's already a string
if (typeof topics === 'string') {
_topics = [web3.fromAscii(topics)];
} else {
// TODO: replace with es6 + babel;
var _topics = [];
for (var i = 0; i < topics.length; i++) {
_topics.push(web3.fromAscii(topics[i]));
}
}
topics = _topics;
var payload = JSON.stringify(data);
var message = {
from: identity,
topics: topics,
payload: web3.fromAscii(payload),
ttl: ttl,
priority: priority
};
return web3.shh.post(message);
};
EmbarkJS.Messages.Whisper.listenTo = function(options) {
var topics = options.topic || options.topics;
if (typeof topics === 'string') {
_topics = [topics];
} else {
// TODO: replace with es6 + babel;
var _topics = [];
for (var i = 0; i < topics.length; i++) {
_topics.push(topics[i]);
}
}
topics = _topics;
var filterOptions = {
topics: topics
};
var messageEvents = function() {
this.cb = function() {};
};
messageEvents.prototype.then = function(cb) {
this.cb = cb;
};
messageEvents.prototype.error = function(err) {
return err;
};
var promise = new messageEvents();
var filter = web3.shh.filter(filterOptions, function(err, result) {
var payload = JSON.parse(web3.toAscii(result.payload));
var data;
if (err) {
promise.error(err);
} else {
data = {
topic: topics,
data: payload,
from: result.from,
time: (new Date(result.sent * 1000))
};
promise.cb(payload, data, result);
}
});
return promise;
};
EmbarkJS.Messages.Orbit = {
};
EmbarkJS.Messages.Orbit.sendMessage = function(options) {
var topics = options.topic || options.topics;
var data = options.data || options.payload;
if (topics === undefined) {
throw new Error("missing option: topic");
}
if (data === undefined) {
throw new Error("missing option: data");
}
if (typeof topics === 'string') {
topics = topics;
} else {
// TODO: better to just send to different channels instead
topics = topics.join(',');
}
this.orbit.join(topics);
var payload = JSON.stringify(data);
this.orbit.send(topics, data);
};
EmbarkJS.Messages.Orbit.listenTo = function(options) {
var self = this;
var topics = options.topic || options.topics;
if (typeof topics === 'string') {
topics = topics;
} else {
topics = topics.join(',');
}
this.orbit.join(topics);
var messageEvents = function() {
this.cb = function() {};
};
messageEvents.prototype.then = function(cb) {
this.cb = cb;
};
messageEvents.prototype.error = function(err) {
return err;
};
var promise = new messageEvents();
this.orbit.events.on('message', (channel, message) => {
// TODO: looks like sometimes it's receving messages from all topics
if (topics !== channel) return;
self.orbit.getPost(message.payload.value, true).then((post) => {
var data = {
topic: channel,
data: post.content,
from: post.meta.from.name,
time: (new Date(post.meta.ts))
};
promise.cb(post.content, data, post);
});
});
return promise;
};
module.exports = EmbarkJS;