src/windows/MediaProxy.js
function fullPathToAppData(uri) {
    if (uri.schemeName === 'file') {
        if (uri.rawUri.indexOf(Windows.Storage.ApplicationData.current.localFolder.path) !== -1) {
            // Also remove path' beginning slash to avoid losing folder name part
            uri = new Windows.Foundation.Uri(localFolderAppDataBasePath, uri.rawUri.replace(localFolderFullPath, '').replace(/^[\\\/]{1,2}/, ''));
        } else if (uri.rawUri.indexOf(Windows.Storage.ApplicationData.current.temporaryFolder.path) !== -1) {
            uri = new Windows.Foundation.Uri(tempFolderAppDataBasePath, uri.rawUri.replace(tempFolderFullPath, '').replace(/^[\\\/]{1,2}/, ''));
        } else {
            throw new Error('Not supported file uri: ' + uri.rawUri);
        }
    }

    return uri;
}
function fullPathToAppData(uri) {
    if (uri.schemeName === 'file') {
        if (uri.rawUri.indexOf(Windows.Storage.ApplicationData.current.localFolder.path) !== -1) {
            // Also remove path' beginning slash to avoid losing folder name part
            uri = new Windows.Foundation.Uri(localFolderAppDataBasePath, uri.rawUri.replace(localFolderFullPath, '').replace(/^[\\\/]{1,2}/, ''));
        } else if (uri.rawUri.indexOf(Windows.Storage.ApplicationData.current.temporaryFolder.path) !== -1) {
            uri = new Windows.Foundation.Uri(tempFolderAppDataBasePath, uri.rawUri.replace(tempFolderFullPath, '').replace(/^[\\\/]{1,2}/, ''));
        } else {
            throw new Error('Not supported file uri: ' + uri.rawUri);
        }
    }

    return uri;
}
function fullPathToAppData ( uri ) { if ( uri . schemeName === 'file' ) { if ( uri . rawUri . indexOf ( Windows . Storage . ApplicationData . current . localFolder . path ) !== - 1 ) { // Also remove path' beginning slash to avoid losing folder name part uri = new Windows . Foundation . Uri ( localFolderAppDataBasePath , uri . rawUri . replace ( localFolderFullPath , '' ) . replace ( / ^[\\\/]{1,2} / , '' ) ) ; } else if ( uri . rawUri . indexOf ( Windows . Storage . ApplicationData . current . temporaryFolder . path ) !== - 1 ) { uri = new Windows . Foundation . Uri ( tempFolderAppDataBasePath , uri . rawUri . replace ( tempFolderFullPath , '' ) . replace ( / ^[\\\/]{1,2} / , '' ) ) ; } else { throw new Error ( 'Not supported file uri: ' + uri . rawUri ) ; } } return uri ; }
Convert native full path to ms-appdata path
@param  {Object} uri Windows.Foundation.Uri
@return {Object}     ms-appdata Windows.Foundation.Uri
Convert native full path to ms - appdata path