skynet-webportal/src/components/HomeUpload/HomeUpload.js

import React, { Component } from "react";
import classNames from "classnames";
import Dropzone from "react-dropzone";
import Reveal from "react-reveal/Reveal";
import shortid from "shortid";
import { Button, UploadFile } from "../";
import { Deco3, Deco4, Deco5, Folder, DownArrow } from "../../svg";
import "./HomeUpload.scss";

export default class HomeUpload extends Component {
  state = { files: [] };

  handleDrop = async acceptedFiles => {
    this.setState({
      files: [...acceptedFiles.map(file => ({ file, status: "uploading" })), ...this.state.files]
    });

    const onComplete = (file, status, skylink) => {
      this.setState(state => {
        const index = state.files.findIndex(f => f.file === file);

        return {
          files: [
            ...state.files.slice(0, index),
            {
              ...state.files[index],
              status,
              url: `https://siasky.net/${skylink}`
            },
            ...state.files.slice(index + 1)
          ]
        };
      });
    };

    acceptedFiles.forEach(async file => {
      try {
        const fd = new FormData();
        fd.append("file", file);

        const uuid = shortid.generate();
        const response = await fetch(`/skynet/skyfile/${uuid}`, { method: "POST", body: fd });
        const { skylink } = await response.json();

        onComplete(file, "complete", skylink);
      } catch (error) {
        onComplete(file, "error");
      }
    });
  };

  handleSkylink = event => {
    event.preventDefault();

    const skylink = event.target.skylink.value.replace("sia://", "");

    if (skylink.match(/^[a-zA-Z0-9_-]{46}$/)) {
      window.open(skylink, "_blank");
    }
  };

  render() {
    return (
      <Reveal effect="active">
        <div className="home-upload">
          <div className="home-upload-white fadeInUp delay4">
            <div className="home-upload-split">
              <div className="home-upload-box ">
                <Dropzone onDrop={acceptedFiles => this.handleDrop(acceptedFiles)}>
                  {({ getRootProps, getInputProps, isDragActive }) => (
                    <>
                      <div
                        className={classNames("home-upload-dropzone", {
                          "drop-active": isDragActive
                        })}
                        {...getRootProps()}
                      >
                        <span className="home-upload-text">
                          <h3>Upload your Files</h3>
                          Drop your files here to pin to Skynet
                        </span>
                        <Button iconLeft>
                          <Folder />
                          Browse
                        </Button>
                      </div>
                      <input {...getInputProps()} className="offscreen" />
                    </>
                  )}
                </Dropzone>
              </div>

              <div className="home-upload-retrieve">
                <div className="home-upload-text">
                  <h3 id="skylink-retrieve-title">Have a Skylink?</h3>
                  <p>Paste the link to retrieve your file</p>

                  <form className="home-upload-retrieve-form" onSubmit={this.handleSkylink}>
                    <input name="skylink" type="text" placeholder="sia://" aria-labelledby="skylink-retrieve-title" />
                    <button type="submit" aria-label="Retrieve file">
                      <DownArrow />
                    </button>
                  </form>
                </div>
              </div>
            </div>

            {this.state.files.length > 0 && (
              <div className="home-uploaded-files">
                {this.state.files.map((file, i) => {
                  return <UploadFile key={i} {...file} />;
                })}
              </div>
            )}
          </div>

          <p className="bottom-text fadeInUp delay5">
            Upon uploading a file, Skynet generates a 46 byte link called a <strong>Skylink</strong>. This link can then
            be shared with anyone to retrieve the file on any Skynet Webportal.
          </p>

          <Deco3 className="deco-3 fadeInUp delay6" />
          <Deco4 className="deco-4 fadeInUp delay6" />
          <Deco5 className="deco-5 fadeInUp delay6" />
        </div>
      </Reveal>
    );
  }
}