export const isImage = (file) => {
    // looks for "image/whatever" in mime type
    const regex = new RegExp("^image/.+", "gi");
    // returns boolean
    return regex.test(file.mime);
};

export const isAudio = (file) => {
    // looks for "audio/whatever" in mime type
    const regex = new RegExp("^audio/.+", "gi");
    // returns boolean
    return regex.test(file.mime);
};

export const isVideo = (file) => {
    // looks for "video/whatever" in mime type
    const regex = new RegExp("^video/.+", "gi");
    // returns boolean
    return regex.test(file.mime);
};

export const isText = (file) => {
    // looks for "text/whatever" in mime type
    const regex = new RegExp("^text/.+", "gi");
    // checks that file.mime is neither text/pdf or text/x-pdf
    if (file.mime == "text/pdf" || file.mime == "text/x-pdf") return false;
    // returns boolean
    return regex.test(file.mime);
};

export const isPdf = (file) => {
    // matches against known pdf formats
    const formats = [
        "text/pdf",
        "text/x-pdf",
        "application/pdf",
        "application/x-pdf",
        "application/vnd.pdf",
        "application/acrobat",
    ];

    return formats.includes(file.mime);
};

export const isDoc = (file) => {
    // matches against known word/doc formats
    const formats = [
        "application/msword",
        "application/vnd.ms-word.document.macroEnabled12",
        "application/vnd.ms-word.template.macroEnabled.12",
        "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
        "application/vnd.oasis.opendocument.text",
        "application/x-abiword",
    ];

    return formats.includes(file.mime);
};

export const isSpreadsheet = (file) => {
    // matches against known excel/spreadsheet formats
    const formats = [
        "application/vnd.mx-excel",
        "application/vnd.ms-exce;.sheet.macroEnabled12",
        "application/vnd.ms-excel.template.macroEnabled.12",
        "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
        "application/vnd.oasis.opendocument.spreadsheet",
    ];

    return formats.includes(file.mime);
};

export const isArchive = (file) => {
    // matches against known archive formats
    const formats = [
        "application/zip",
        "application/gzip",
        "application/x-freearc",
        "application/x-bzip",
        "application/x-bzip2",
        "application/vnd.rar",
        "application/x-7z-compressed",
    ];

    return formats.includes(file.mime);
};