300 lines
11 KiB
JavaScript
300 lines
11 KiB
JavaScript
class CodeGenerator {
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constructor(options) {
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this.blockchainConfig = options.blockchainConfig || {};
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this.contractsConfig = options.contractsConfig || {};
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this.storageConfig = options.storageConfig || {};
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this.communicationConfig = options.communicationConfig || {};
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this.contractsManager = options.contractsManager;
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this.plugins = options.plugins;
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this.events = options.events;
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}
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listenToCommands() {
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let self = this;
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this.events.setCommandHandler('abi-vanila', function(cb) {
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let vanillaABI = self.generateABI({useEmbarkJS: false});
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let contractsJSON = self.generateContractsJSON();
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cb(vanillaABI, contractsJSON);
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});
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this.events.setCommandHandler('abi', function(cb) {
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let embarkJSABI = self.generateABI({useEmbarkJS: true});
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let contractsJSON = self.generateContractsJSON();
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cb(embarkJSABI, contractsJSON);
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});
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this.events.setCommandHandler('abi-contracts-vanila', function(cb) {
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let vanillaContractsABI = self.generateContracts(false);
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let contractsJSON = self.generateContractsJSON();
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cb(vanillaContractsABI, contractsJSON);
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});
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this.events.setCommandHandler('abi-vanila-deployment', function(cb) {
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let vanillaABI = self.generateABI({useEmbarkJS: false, deployment: true});
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let contractsJSON = self.generateContractsJSON();
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cb(vanillaABI, contractsJSON);
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});
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}
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generateProvider(isDeployment) {
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let self = this;
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let result = "";
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let providerPlugins;
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// TODO: check contractsConfig for enabled
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if (self.blockchainConfig === {} || self.blockchainConfig.enabled === false) {
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return "";
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}
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result += "\nfunction __reduce(arr, memo, iteratee, cb) {";
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result += "\n if (typeof cb !== 'function') {";
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result += "\n if (typeof memo === 'function' && typeof iteratee === 'function') {";
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result += "\n cb = iteratee;";
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result += "\n iteratee = memo;";
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result += "\n memo = [];";
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result += "\n } else {";
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result += "\n throw new TypeError('expected callback to be a function');";
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result += "\n }";
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result += "\n }";
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result += "\n";
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result += "\n if (!Array.isArray(arr)) {";
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result += "\n cb(new TypeError('expected an array'));";
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result += "\n return;";
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result += "\n }";
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result += "\n";
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result += "\n if (typeof iteratee !== 'function') {";
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result += "\n cb(new TypeError('expected iteratee to be a function'));";
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result += "\n return;";
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result += "\n }";
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result += "\n";
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result += "\n (function next(i, acc) {";
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result += "\n if (i === arr.length) {";
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result += "\n cb(null, acc);";
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result += "\n return;";
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result += "\n }";
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result += "\n";
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result += "\n iteratee(acc, arr[i], function(err, val) {";
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result += "\n if (err) {";
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result += "\n cb(err);";
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result += "\n return;";
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result += "\n }";
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result += "\n next(i + 1, val);";
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result += "\n });";
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result += "\n })(0, memo);";
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result += "\n};";
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result += "\nvar whenEnvIsLoaded = function(cb) {";
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result += "\n if (typeof document !== 'undefined' && document !== null) {";
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result += "\n document.addEventListener('DOMContentLoaded', cb);";
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result += "\n } else {";
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result += "\n cb();";
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result += "\n }";
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result += "\n}";
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if (this.plugins) {
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providerPlugins = this.plugins.getPluginsFor('clientWeb3Provider');
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}
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if (this.plugins && providerPlugins.length > 0) {
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providerPlugins.forEach(function(plugin) {
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result += plugin.generateProvider(self) + "\n";
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});
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} else {
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result += "\nwhenEnvIsLoaded(function() {\n";
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result += "\nif (typeof window !== 'undefined') { window.web3 = undefined; }";
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if (isDeployment) {
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let connection = "http://" + this.contractsConfig.deployment.host + ":" + this.contractsConfig.deployment.port;
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result += '\n\tweb3 = new Web3(new Web3.providers.HttpProvider("' + connection + '"));';
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} else {
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let connectionCode = "";
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connectionCode += "\n__reduce([";
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connectionCode += this.contractsConfig.dappConnection.map((x) => '"' + x + '"').join(',');
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connectionCode += "], function(prev, value, next) {";
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connectionCode += "\nif (prev === false) {";
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connectionCode += "\n return next(null, false);";
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connectionCode += "\n}";
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connectionCode += "\n if (value === '$WEB3' && (typeof web3 !== 'undefined' && typeof Web3 !== 'undefined')) {";
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connectionCode += '\n\tweb3 = new Web3(web3.currentProvider);';
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connectionCode += "\n } else if (value !== '$WEB3' && (typeof Web3 !== 'undefined' && ((typeof web3 === 'undefined') || (typeof web3 !== 'undefined' && (!web3.isConnected || (web3.isConnected && !web3.isConnected())))))) {";
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connectionCode += "\n\tweb3 = new Web3(new Web3.providers.HttpProvider(value));"
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connectionCode += "\n}";
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connectionCode += "\nelse if (value === '$WEB3') {";
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connectionCode += "\n\treturn next(null, '');";
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connectionCode += "\n}";
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connectionCode += "\nweb3.eth.getAccounts(function(err, account) { if(err) { next(null, true) } else { next(null, false) }})";
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connectionCode += "\n}, function(err, _result) {";
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connectionCode += "\n});";
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result += connectionCode;
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}
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result += "\nweb3.eth.defaultAccount = web3.eth.accounts[0];";
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result += '\n})';
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}
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return result;
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}
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generateContracts(useEmbarkJS) {
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let self = this;
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let result = "\n";
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let contractsPlugins;
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if (self.blockchainConfig === {} || self.blockchainConfig.enabled === false) {
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return "";
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}
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if (this.plugins) {
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contractsPlugins = this.plugins.getPluginsFor('contractGeneration');
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}
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if (this.plugins && contractsPlugins.length > 0) {
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contractsPlugins.forEach(function (plugin) {
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result += plugin.generateContracts({contracts: self.contractsManager.contracts});
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});
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} else {
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for (let className in this.contractsManager.contracts) {
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let contract = this.contractsManager.contracts[className];
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let abi = JSON.stringify(contract.abiDefinition);
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let gasEstimates = JSON.stringify(contract.gasEstimates);
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// TODO: refactor this
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result += "\nif (whenEnvIsLoaded === undefined) {";
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result += "\n var whenEnvIsLoaded = function(cb) {";
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result += "\n if (typeof document !== 'undefined' && document !== null) {";
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result += "\n document.addEventListener('DOMContentLoaded', cb);";
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result += "\n } else {";
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result += "\n cb();";
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result += "\n }";
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result += "\n }";
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result += "\n}";
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result += "\nwhenEnvIsLoaded(function() {";
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result += "\nif (typeof window !== 'undefined') { window." + className + " = undefined; }";
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if (useEmbarkJS) {
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let contractAddress = contract.deployedAddress ? ("'" + contract.deployedAddress + "'") : "undefined";
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result += "\n" + className + " = new EmbarkJS.Contract({abi: " + abi + ", address: " + contractAddress + ", code: '" + contract.code + "', gasEstimates: " + gasEstimates + "});";
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} else {
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result += "\n" + className + "Abi = " + abi + ";";
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result += "\n" + className + "Contract = web3.eth.contract(" + className + "Abi);";
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result += "\n" + className + " = " + className + "Contract.at('" + contract.deployedAddress + "');";
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}
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result += '\n});';
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}
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}
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return result;
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}
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generateStorageInitialization(useEmbarkJS) {
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let self = this;
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let result = "\n";
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if (!useEmbarkJS || self.storageConfig === {}) return "";
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if (self.storageConfig.provider === 'ipfs' && self.storageConfig.enabled === true) {
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// TODO: make this more readable
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result += "\nvar whenEnvIsLoaded = function(cb) {";
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result += "\n if (typeof document !== 'undefined' && document !== null) {";
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result += "\n document.addEventListener('DOMContentLoaded', cb);";
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result += "\n } else {";
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result += "\n cb();";
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result += "\n }";
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result += "\n}";
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result += "\nwhenEnvIsLoaded(function() {\n";
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result += "\nEmbarkJS.Storage.setProvider('" + self.storageConfig.provider + "', {server: '" + self.storageConfig.host + "', port: '" + self.storageConfig.port + "', getUrl: '" + self.storageConfig.getUrl + "'});";
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result += '\n})';
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}
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return result;
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}
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generateCommunicationInitialization(useEmbarkJS) {
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let self = this;
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let result = "\n";
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if (!useEmbarkJS || self.communicationConfig === {}) return "";
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result += "\nvar whenEnvIsLoaded = function(cb) {";
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result += "\n if (typeof document !== 'undefined' && document !== null) {";
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result += "\n document.addEventListener('DOMContentLoaded', cb);";
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result += "\n } else {";
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result += "\n cb();";
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result += "\n }";
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result += "\n}";
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if (self.communicationConfig.provider === 'whisper' && self.communicationConfig.enabled === true) {
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result += "\nwhenEnvIsLoaded(function() {\n";
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result += "\nEmbarkJS.Messages.setProvider('" + self.communicationConfig.provider + "');";
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result += '\n})';
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} else if (self.communicationConfig.provider === 'orbit' && self.communicationConfig.enabled === true) {
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result += "\nwhenEnvIsLoaded(function() {\n";
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if (self.communicationConfig.host === undefined && self.communicationConfig.port === undefined) {
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result += "\nEmbarkJS.Messages.setProvider('" + self.communicationConfig.provider + "');";
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} else {
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result += "\nEmbarkJS.Messages.setProvider('" + self.communicationConfig.provider + "', {server: '" + self.communicationConfig.host + "', port: '" + self.communicationConfig.port + "'});";
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}
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result += '\n})';
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}
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return result;
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}
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generateABI(options) {
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let result = "";
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result += this.generateProvider(options.deployment);
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result += this.generateContracts(options.useEmbarkJS);
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//result += this.generateStorageInitialization(options.useEmbarkJS);
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//result += this.generateCommunicationInitialization(options.useEmbarkJS);
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return result;
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}
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generateContractsJSON() {
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let contracts = {};
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for (let className in this.contractsManager.contracts) {
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let contract = this.contractsManager.contracts[className];
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let contractJSON = {};
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let abi = JSON.stringify(contract.abiDefinition);
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let gasEstimates = JSON.stringify(contract.gasEstimates);
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contractJSON.contract_name = className;
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contractJSON.address = contract.deployedAddress;
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contractJSON.code = contract.code;
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contractJSON.runtime_bytecode = contract.runtimeBytecode;
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contractJSON.real_runtime_bytecode = contract.realRuntimeBytecode;
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contractJSON.swarm_hash = contract.swarmHash;
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contractJSON.gas_estimates = contract.gasEstimates;
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contractJSON.function_hashes = contract.functionHashes;
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contractJSON.abi = contract.abiDefinition;
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contracts[className] = contractJSON;
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}
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return contracts;
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}
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}
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module.exports = CodeGenerator;
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