Render the Note Form

validateForm() {
  return this.state.content.length > 0;
}

formatFilename(str) {
  return str.replace(/^\w+-/, "");
}

handleChange = event => {
  this.setState({
    [event.target.id]: event.target.value
  });
}

handleFileChange = event => {
  this.file = event.target.files[0];
}

handleSubmit = async event => {
  event.preventDefault();

  if (this.file && this.file.size > config.MAX_ATTACHMENT_SIZE) {
    alert(`Please pick a file smaller than ${config.MAX_ATTACHMENT_SIZE/1000000} MB.`);
    return;
  }

  this.setState({ isLoading: true });
}

handleDelete = async event => {
  event.preventDefault();

  const confirmed = window.confirm(
    "Are you sure you want to delete this note?"
  );

  if (!confirmed) {
    return;
  }

  this.setState({ isDeleting: true });
}

render() {
  return (
    <div className="Notes">
      {this.state.note &&
        <form onSubmit={this.handleSubmit}>
          <FormGroup controlId="content">
            <FormControl
              onChange={this.handleChange}
              value={this.state.content}
              componentClass="textarea"
            />
          </FormGroup>
          {this.state.note.attachment &&
            <FormGroup>
              <ControlLabel>Attachment</ControlLabel>
              <FormControl.Static>
                <a
                  target="_blank"
                  rel="noopener noreferrer"
                  href={this.state.attachmentURL}
                >
                  {this.formatFilename(this.state.note.attachment)}
                </a>
              </FormControl.Static>
            </FormGroup>}
          <FormGroup controlId="file">
            {!this.state.note.attachment &&
              <ControlLabel>Attachment</ControlLabel>}
            <FormControl onChange={this.handleFileChange} type="file" />
          </FormGroup>
          <LoaderButton
            block
            bsStyle="primary"
            bsSize="large"
            disabled={!this.validateForm()}
            type="submit"
            isLoading={this.state.isLoading}
            text="Save"
            loadingText="Saving…"
          />
          <LoaderButton
            block
            bsStyle="danger"
            bsSize="large"
            isLoading={this.state.isDeleting}
            onClick={this.handleDelete}
            text="Delete"
            loadingText="Deleting…"
          />
        </form>}
    </div>
  );
}