js helper functions

export const o_O = (promise) => {
    return promise.then(data => {
        if(data instanceof Error) return [data]
        return [null, data]
    }).catch(err => [err])
}

// Create Search Url
export const urlString = (str) => {
    return str.toLowerCase().replace(new RegExp(' ', 'g'), '+');
}

// Check whether an object is empty
export const isEmpty = (obj) => {
    for (let key in obj) {
        if (obj.hasOwnProperty(key))
            return false;
    }
    return true;
}

export const goBack = () => window.history.go(-1);
export const isUrl = (url) => window.route().current(url);
export const goForward = () => window.history.go(1);

// Format date
export const formatDate = (template, date) => {
    var specs = 'YYYY:MM:DD:HH:mm:ss'.split(':');
    date = new Date(date || Date.now() - new Date().getTimezoneOffset() * 6e4);
    return date.toISOString().split(/[-:.TZ]/).reduce(function(template, item, i) {
      return template.split(specs[i]).join(item);
    }, template);
}

// Show Date Only
export const showDate = (date) => {
    var specs = 'YYYY:MM:DD:HH:mm:ss'.split(':');
    date = new Date(date || Date.now() - new Date().getTimezoneOffset() * 6e4);
    // date = date.
}

// Create Url Slug
export function createSlug(str) {
    str = str.replace(/^\s+|\s+$/g, ""); // trim
    str = str.toLowerCase();

    // remove accents, swap ñ for n, etc
    const from = "åàáãäâèéëêìíïîòóöôùúüûñç·/_,:;";
    const to = "aaaaaaeeeeiiiioooouuuunc------";

    let i = 0, l = from.length;
    for (; i < l; i++) {
        str = str.replace(new RegExp(from.charAt(i), "g"), to.charAt(i));
    }

    str = str
        .replace(/[^a-z0-9 -]/g, "") // remove invalid chars
        .replace(/\s+/g, "-") // collapse whitespace and replace by -
        .replace(/-+/g, "-") // collapse dashes
        .replace(/^-+/, "") // trim - from start of text
        .replace(/-+$/, ""); // trim - from end of text

    return str;
}