embark/templates/demo/app/components/storage.js

import EmbarkJS from 'Embark/EmbarkJS';
import React from 'react';
import {Alert, Form, FormGroup, FormControl, HelpBlock, Button} from 'react-bootstrap';

class Storage extends React.Component {

  constructor(props) {
    super(props);

    this.state = {
      textToSave: 'hello world!',
      generatedHash: '',
      loadText: '',
      storedText: '',
      fileToUpload: null,
      fileHash: '',
      imageToDownload: '',
      url: '',
      logs: [],
      storageError: '',
      ipfsHash: '',
      ipnsResolveName: '',
    };
  }

  handleChange(e, name) {
    this.state[name] = e.target.value;
    this.setState(this.state);
  }

  handleFileUpload(e) {
    this.setState({fileToUpload: [e.target]});
  }

  addToLog(txt) {
    this.state.logs.push(txt);
    this.setState({logs: this.state.logs});
  }

  setText(e) {
    e.preventDefault();

    EmbarkJS.Storage.saveText(this.state.textToSave)
      .then((hash) => {
        this.setState({
          generatedHash: hash,
          loadText: hash,
          storageError: ''
        });
        this.addToLog("EmbarkJS.Storage.saveText('" + this.state.textToSave + "').then(function(hash) { })");
      })
      .catch((err) => {
        if (err) {
          this.setState({storageError: err.message});
          console.log("Storage saveText Error => " + err.message);
        }
      });
  }

  loadHash(e) {
    e.preventDefault();

    EmbarkJS.Storage.get(this.state.loadText)
      .then((content) => {
        this.setState({storedText: content, storageError: ''});
        this.addToLog("EmbarkJS.Storage.get('" + this.state.loadText + "').then(function(content) { })");
      })
      .catch((err) => {
        if (err) {
          this.setState({storageError: err.message});
          console.log("Storage get Error => " + err.message);
        }
      });
  }

  uploadFile(e) {
    e.preventDefault();

    EmbarkJS.Storage.uploadFile(this.state.fileToUpload)
      .then((hash) => {
        this.setState({
          fileHash: hash,
          imageToDownload: hash,
          storageError: ''
        });
        this.addToLog("EmbarkJS.Storage.uploadFile(this.state.fileToUpload).then(function(hash) { })");
      })
      .catch((err) => {
        if (err) {
          this.setState({storageError: err.message});
          console.log("Storage uploadFile Error => " + err.message);
        }
      });
  }

  loadFile(e) {
    let _url = EmbarkJS.Storage.getUrl(this.state.imageToDownload);
    this.setState({url: _url});
    this.addToLog("EmbarkJS.Storage.getUrl('" + this.state.imageToDownload + "')");
  }

  ipnsRegister(e) {
    e.preventDefault();
    this.setState({ ipnsRegistering: true });
    EmbarkJS.Names.register(this.state.ipfsHash, (err, name) => {
      if (err) {
        console.log("Name Register Error => " + err.message);
      }

      this.setState({
        ipnsResolveName: name,
        ipnsName: name,
        ipnsRegistering: false
      });
      this.addToLog("EmbarkJS.Names.register(this.state.ipfsHash).then(function(hash) { })");
    });
  }

  ipnsResolve(e) {
    e.preventDefault();
    this.setState({ ipnsResolving: true });
    EmbarkJS.Names.resolve(this.state.ipnsName, (err, path) => {
      if (err) {
        console.log("Name Resolve Error => " + err.message);
      }

      this.setState({
        ipfsPath: path,
        ipnsResolving: false
      });
      this.addToLog("EmbarkJS.Names.resolve(this.state.ipnsName, function(err, path) { })");
    });
  }

  render() {
    return <React.Fragment>
      {
        !this.props.enabled ?
          <React.Fragment>
            <Alert bsStyle="warning">The node you are using does not support IPFS. Please ensure <a
              href="https://github.com/ipfs/js-ipfs-api#cors" target="_blank">CORS</a> is setup for the IPFS
              node.</Alert>
          </React.Fragment> : ''
      }
      {
        this.state.storageError !== '' ?
          <Alert bsStyle="danger">{this.state.storageError}</Alert>
          : ''
      }
      <h3>Save text to storage</h3>
      <Form inline>
        <FormGroup>
          <FormControl
            type="text"
            defaultValue={this.state.textToSave}
            onChange={e => this.handleChange(e, 'textToSave')}/>
          <Button bsStyle="primary" onClick={(e) => this.setText(e)}>Save Text</Button>
          <HelpBlock>generated Hash: <span className="textHash">{this.state.generatedHash}</span></HelpBlock>
        </FormGroup>
      </Form>

      <h3>Load text from storage given an hash</h3>
      <Form inline>
        <FormGroup>
          <FormControl
            type="text"
            value={this.state.loadText}
            onChange={e => this.handleChange(e, 'loadText')}/>
          <Button bsStyle="primary" onClick={(e) => this.loadHash(e)}>Load</Button>
          <HelpBlock>result: <span className="textHash">{this.state.storedText}</span></HelpBlock>
        </FormGroup>
      </Form>

      <h3>Upload file to storage</h3>
      <Form inline>
        <FormGroup>
          <FormControl
            type="file"
            onChange={(e) => this.handleFileUpload(e)}/>
          <Button bsStyle="primary" onClick={(e) => this.uploadFile(e)}>Upload</Button>
          <HelpBlock>generated hash: <span className="fileHash">{this.state.fileHash}</span></HelpBlock>
        </FormGroup>
      </Form>

      <h3>Get file or image from storage</h3>
      <Form inline>
        <FormGroup>
          <FormControl
            type="text"
            value={this.state.imageToDownload}
            onChange={e => this.handleChange(e, 'imageToDownload')}/>
          <Button bsStyle="primary" onClick={(e) => this.loadFile(e)}>Download</Button>
          <HelpBlock>file available at: <span><a href={this.state.url}
                                                 target="_blank">{this.state.url}</a></span></HelpBlock>
          <HelpBlock><img src={this.state.url}/></HelpBlock>
        </FormGroup>
      </Form>

      <h3>Register to IPNS</h3>
      <Form inline>
        <FormGroup>
          <FormControl
            type="text"
            value={this.state.ipfsHash}
            onChange={e => this.handleChange(e, 'ipfsHash')}/>
          <Button bsStyle="primary" onClick={(e) => this.ipnsRegister(e)}>
            {this.state.ipnsRegistering ? 'Registering...' : 'Register' }
          </Button>
          <HelpBlock>It will take around 1 minute</HelpBlock>
          <HelpBlock>registered at: <span>{this.state.ipnsName}</span></HelpBlock>
        </FormGroup>
      </Form>

      <h3>Resolve name</h3>
      <Form inline>
        <FormGroup>
          <FormControl
            type="text"
            value={this.state.ipnsResolveName}
            onChange={e => this.handleChange(e, 'ipnsResolveName')}/>
          <Button bsStyle="primary" onClick={(e) => this.ipnsResolve(e)}>
            {this.state.ipnsResolving ? 'Resolving...' : 'Resolve' }
          </Button>
          <HelpBlock>It will take around 1 minute</HelpBlock>
          <HelpBlock>IPFS path: <span>{this.state.ipfsPath}</span></HelpBlock>
        </FormGroup>
      </Form>


      <p>Javascript calls being made: </p>
      <div className="logs">
        <p>EmbarkJS.Storage.setProvider('ipfs',{'{'}server: 'localhost', port: '5001'{'}'})</p>
        {
          this.state.logs.map((item, i) => <p key={i}>{item}</p>)
        }
      </div>
    </React.Fragment>;
  }
}

export default Storage;