/*
    Image DB
    The get and put function for image classification database
    and its utilities
*/

requirelib("filelib");

//Get all possible roots, return array of [name, path and photo root]
function getAllPossibleRoots(){
    function folderContainSubFiles(filepath){
        var results = filelib.aglob(filepath + "/*", "default");
        if (results.length > 0){
            return true;
        }
        return false;
    }
    var possibleRoots = [];
    for ( var i = 0; i < USER_VROOTS.length; i++){
        var thisRoot = USER_VROOTS[i];
        if (thisRoot.Filesystem != "virtual" && filelib.fileExists(thisRoot.UUID + ":/Photo") && folderContainSubFiles(thisRoot.UUID + ":/Photo/")){
            possibleRoots.push([thisRoot.Name, thisRoot.UUID + ":/", thisRoot.UUID + ":/Photo"]);
        }
    }

    return possibleRoots;
}

function isSupportedImage(filename){
    if (fileExt == "jpg" || fileExt == "png" || fileExt == "jpeg"){
        return true;
    }else{
        return false
    }
}

//Get all the image files exists in *:/Photo/*
function getAllImageFiles(){
    var results = [];
    var possibleRoots = getAllPossibleRoots();
    for ( var i = 0; i < possibleRoots.length; i++){
        var thisRootInfo = possibleRoots[i];
        var allFilesInThisPhotoRoot = filelib.walk(thisRootInfo[2]);
        for ( var j = 0; j < allFilesInThisPhotoRoot.length; j++){
            var thisFile = allFilesInThisPhotoRoot[j];
            if (!filelib.isDir(thisFile) && isSupportedImage(thisFile)){
                results.push(thisFile);
            }
        }
    }

    return results;
}