mirror of https://github.com/embarklabs/embark.git
120 lines
3.3 KiB
JavaScript
120 lines
3.3 KiB
JavaScript
/*global web3 */
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let __embarkSwarm = {_swarmConnection: undefined};
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let SwarmAPI = require('swarm-api');
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if (SwarmAPI.default) {
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SwarmAPI = SwarmAPI.default;
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}
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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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this._swarmConnection = new SwarmAPI({gateway: this._connectUrl});
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}
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else if (options.useOnlyGivenProvider && web3.bzz.givenProvider !== null) {
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this._swarmConnection = new SwarmAPI({gateway: 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 (!this._swarmConnection) {
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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 (!this._swarmConnection.gateway && this._config.host) {
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this._swarmConnection.gateway = this._connectUrl;
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}
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if (!this._swarmConnection.gateway) {
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return resolve(false);
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}
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this._swarmConnection.isAvailable((err, isAvailable) => {
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if (err) return reject(err);
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resolve(isAvailable);
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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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this._swarmConnection.uploadRaw(text, (err, hash) => {
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if (err) return reject(err);
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resolve(hash);
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});
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});
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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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this._swarmConnection.downloadRaw(hash, (err, content) => {
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if (err) return reject(err);
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resolve(content);
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});
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});
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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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this._swarmConnection.uploadRaw(fileContent, (err, hash) => {
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if (err) return reject(err);
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resolve(hash);
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});
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});
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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._connectUrl}/bzz-raw:/${hash}`;
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};
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const NotAvailable = "Not available with Swarm";
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__embarkSwarm.resolve = function (_name, callback) {
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callback(NotAvailable);
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};
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__embarkSwarm.register = function (_addr, callback) {
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callback(NotAvailable);
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};
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