discourse/app/assets/javascripts/admin/templates/modal/admin-import-theme.hbs

{{#d-modal-body class='upload-selector' title="admin.customize.theme.import_theme"}}
  <div class="radios">
    {{radio-button name="upload" id="local" value="local" selection=selection}}
    <label class="radio" for="local">{{i18n 'upload_selector.from_my_computer'}}</label>
    {{#if local}}
      <div class="inputs">
        <input type="file" id="file-input" accept='.dcstyle.json,application/json'><br>
        <span class="description">{{i18n 'admin.customize.theme.import_file_tip'}}</span>
      </div>
    {{/if}}
  </div>
  <div class="radios">
    {{radio-button name="upload" id="remote" value="remote" selection=selection}}
    <label class="radio" for="remote">{{i18n 'upload_selector.from_the_web'}}</label>
    {{#if remote}}
      <div class="inputs">
        {{input value=uploadUrl placeholder="https://github.com/discourse/discourse/sample_theme"}}
        <span class="description">{{i18n 'admin.customize.theme.import_web_tip'}}</span>
        {{#if checkPrivate}}
          <div class='check-private'>
          <label>
            {{input type="checkbox" checked=privateChecked}}
            {{i18n 'admin.customize.theme.is_private'}}
          </label>
          {{#if privateChecked}}
          {{#if publicKey}}
          <div class='public-key'>
            {{i18n 'admin.customize.theme.public_key'}}
            {{textarea disabled=true value=publicKey}}
          </div>
          {{/if}}
          {{/if}}
          </div>
        {{/if}}
      </div>

    {{/if}}
  </div>
{{/d-modal-body}}

<div class="modal-footer">
  {{d-button action="importTheme" disabled=loading class='btn btn-primary' icon='upload' label='admin.customize.import'}}
  {{d-modal-cancel close=(action "closeModal")}}
</div>