<input type="file" ngf-select ng-model="input.value" name="{{input.name}}" ngf-model-invalid="errorFile" required>
<button type="button" ng-show="input.value !== null" ng-click="uploadFile(input.value, $index)">Upload File</button>
<span ng-show="input.value.progress >= 0">
    <div class="progress" style="width:{{input.value.progress}}%" ng-bind="input.value.progress + '%'"></div>
</span>