mirror of https://github.com/embarklabs/embark.git
106 lines
2.9 KiB
JavaScript
106 lines
2.9 KiB
JavaScript
/*global web3 */
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let __embarkSwarm = {};
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const bytes = require("eth-lib/lib/bytes");
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__embarkSwarm.setProvider = function (options) {
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let protocol = options.protocol || 'http';
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let port = options.port ? `:${options.port}` : '';
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this._config = options;
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this._connectUrl = `${protocol}://${options.host}${port}`;
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this._connectError = new Error(`Cannot connect to Swarm node on ${this._connectUrl}`);
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return new Promise((resolve, reject) => {
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try {
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if (!web3.bzz.currentProvider && !options.useOnlyGivenProvider) {
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web3.bzz.setProvider(this._connectUrl);
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}
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else if(options.useOnlyGivenProvider && web3.bzz.givenProvider !== null){
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web3.bzz.setProvider(web3.bzz.givenProvider);
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}
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resolve(this);
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} catch (err) {
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console.log(err);
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reject(this._connectError);
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}
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});
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};
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__embarkSwarm.isAvailable = function () {
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return new Promise((resolve, reject) => {
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// if web3 swarm object doesn't exist
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if (!web3.bzz) {
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return resolve(false);
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}
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// swarm obj exists, but has no provider set (seems to happen a LOT!),
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// try setting the provider to our currently set provider again
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else if(!web3.bzz.currentProvider && this._config.host){
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web3.bzz.setProvider(this._connectUrl);
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}
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if (!web3.bzz.currentProvider) {
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return resolve(false);
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}
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web3.bzz.isAvailable()
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.then(resolve)
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.catch(() => {
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reject(this._connectError);
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});
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});
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};
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__embarkSwarm.saveText = function (text) {
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return new Promise((resolve, reject) => {
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this.isAvailable().then((isAvailable) => {
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if (!isAvailable) {
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return reject(this._connectError);
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}
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web3.bzz.upload(text)
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.then(resolve)
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.catch(reject);
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}).catch(reject);
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});
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};
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__embarkSwarm.get = function (hash) {
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return new Promise((resolve, reject) => {
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this.isAvailable().then((isAvailable) => {
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if (!isAvailable) {
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return reject(this._connectError);
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}
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web3.bzz.download(hash)
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.then((uint8Array) => resolve(bytes.toString(bytes.fromUint8Array(uint8Array))))
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.catch(reject);
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}).catch(reject);
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});
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};
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__embarkSwarm.uploadFile = function (inputSelector) {
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let file = inputSelector[0].files[0];
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if (file === undefined) {
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throw new Error('no file found');
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}
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return new Promise((resolve, reject) => {
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const reader = new FileReader();
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reader.onloadend = (event) => {
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const fileContent = new Uint8Array(event.target.result);
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this.isAvailable().then((isAvailable) => {
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if (!isAvailable) {
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return reject(this._connectError);
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}
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web3.bzz.upload(fileContent)
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.then(resolve)
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.catch(reject);
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}).catch(reject);
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};
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reader.onerror = reject;
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reader.readAsArrayBuffer(file);
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});
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};
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__embarkSwarm.getUrl = function (hash) {
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return `${this._config.getUrl || this._connectUrl + '/bzz:/'}${hash}`;
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};
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