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// localization = {} -- the dict with translations is created by the backend

ignore_ids_for_localization={
    setting_sd_hypernetwork: 'OPTION',
    setting_sd_model_checkpoint: 'OPTION',
    setting_realesrgan_enabled_models: 'OPTION',
    modelmerger_primary_model_name: 'OPTION',
    modelmerger_secondary_model_name: 'OPTION',
    modelmerger_tertiary_model_name: 'OPTION',
    train_embedding: 'OPTION',
    train_hypernetwork: 'OPTION',
    txt2img_styles: 'OPTION',
    img2img_styles: 'OPTION',
    setting_random_artist_categories: 'SPAN',
    setting_face_restoration_model: 'SPAN',
    setting_realesrgan_enabled_models: 'SPAN',
    extras_upscaler_1: 'SPAN',
    extras_upscaler_2: 'SPAN',
}

re_num = /^[\.\d]+$/
re_emoji = /[\p{Extended_Pictographic}\u{1F3FB}-\u{1F3FF}\u{1F9B0}-\u{1F9B3}]/u

original_lines = {}
translated_lines = {}

function textNodesUnder(el){
    var n, a=[], walk=document.createTreeWalker(el,NodeFilter.SHOW_TEXT,null,false);
    while(n=walk.nextNode()) a.push(n);
    return a;
}

function canBeTranslated(node, text){
    if(! text) return false;
    if(! node.parentElement) return false;

    parentType = node.parentElement.nodeName
    if(parentType=='SCRIPT' || parentType=='STYLE' || parentType=='TEXTAREA') return false;

    if (parentType=='OPTION' || parentType=='SPAN'){
        pnode = node
        for(var level=0; level<4; level++){
            pnode = pnode.parentElement
            if(! pnode) break;

            if(ignore_ids_for_localization[pnode.id] == parentType) return false;
        }
    }

    if(re_num.test(text)) return false;
    if(re_emoji.test(text)) return false;
    return true
}

function getTranslation(text){
    if(! text) return undefined

    if(translated_lines[text] === undefined){
        original_lines[text] = 1
    }

    tl = localization[text]
    if(tl !== undefined){
        translated_lines[tl] = 1
    }

    return tl
}

function processTextNode(node){
    text = node.textContent.trim()

    if(! canBeTranslated(node, text)) return

    tl = getTranslation(text)
    if(tl !== undefined){
        node.textContent = tl
    }
}

function processNode(node){
    if(node.nodeType == 3){
        processTextNode(node)
        return
    }

    if(node.title){
        tl = getTranslation(node.title)
        if(tl !== undefined){
            node.title = tl
        }
    }

    if(node.placeholder){
        tl = getTranslation(node.placeholder)
        if(tl !== undefined){
            node.placeholder = tl
        }
    }

    textNodesUnder(node).forEach(function(node){
        processTextNode(node)
    })
}

function dumpTranslations(){
    dumped = {}
    if (localization.rtl) {
        dumped.rtl = true
    }

    Object.keys(original_lines).forEach(function(text){
        if(dumped[text] !== undefined)  return

        dumped[text] = localization[text] || text
    })

    return dumped
}

onUiUpdate(function(m){
    m.forEach(function(mutation){
        mutation.addedNodes.forEach(function(node){
            processNode(node)
        })
    });
})


document.addEventListener("DOMContentLoaded", function() {
    processNode(gradioApp())

    if (localization.rtl) {  // if the language is from right to left,
        (new MutationObserver((mutations, observer) => { // wait for the style to load
            mutations.forEach(mutation => {
                mutation.addedNodes.forEach(node => {
                    if (node.tagName === 'STYLE') {
                        observer.disconnect();

                        for (const x of node.sheet.rules) {  // find all rtl media rules
                            if (Array.from(x.media || []).includes('rtl')) {
                                x.media.appendMedium('all');  // enable them
                            }
                        }
                    }
                })
            });
        })).observe(gradioApp(), { childList: true });
    }
})

function download_localization() {
    text = JSON.stringify(dumpTranslations(), null, 4)

    var element = document.createElement('a');
    element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));
    element.setAttribute('download', "localization.json");
    element.style.display = 'none';
    document.body.appendChild(element);

    element.click();

    document.body.removeChild(element);
}