PIbd-21_BatylkinaAO_MusoevDT_Canteen/Canteen/CanteenVisitorApp/wwwroot/js/site.js

const wordButton = document.getElementById("word-button");
const excelButton = document.getElementById("excel-button");
const lunchIdSelect = document.getElementById("LunchId");
const wordMIME = "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
const excelMIME = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";

if (wordButton) {
    wordButton.addEventListener("click", () => {
        saveList("docx");
        console.log("сохранить в docx")
    });
}

if (excelButton) {
    excelButton.addEventListener("click", () => {
        saveList("xlsx");
    });
}

const saveList = async function (fileType) {
    let lunchIdSelect = document.getElementById("LunchId");
    if (!lunchIdSelect) {
        console.log("Element with id 'LunchId' not found.");
        return;
    }

    let listModel = {
        "LunchId": Array.from(lunchIdSelect.selectedOptions).map(option => option.value),
        "FileType": fileType
    };

    $.ajax({
        url: `/home/SaveReport`,
        type: 'POST',
        contentType: 'application/json',
        headers: { "Content-Type": "application/json" },
        data: JSON.stringify(listModel)
    }).done((file) => {
        let byteArray = new Uint8Array(file);
        saveFile(byteArray, fileType);
    });
};

const saveFile = async function (bytes, fileType) {
    if (window.showSaveFilePicker) {
        let type;
        if (fileType == "docx") {
            type = {
                description: "Microsoft Word (OpenXML)",
                accept: { [wordMIME]: [".docx"] }
            };
        } else if (fileType == "xlsx") {
            type = {
                description: "Microsoft Excel (OpenXML)",
                accept: { [excelMIME]: [".xlsx"] }
            };
        }
        const opts = {
            suggestedName: `equipment-purchase-list.${fileType}`,
            types: [type],
        };
        try {
            const handle = await showSaveFilePicker(opts);
            const writable = await handle.createWritable();
            await writable.write(bytes);
            await writable.close();
        } catch (error) {
            console.error("Error saving file:", error);
        }
    }
};