@svelte-use/shared/index.mjs

import { get_current_component } from 'svelte/internal';
import { writable as writable$1, get } from 'svelte/store';
import { onDestroy, onMount } from 'svelte';

/**
 * Call onDestroy() if it's inside a component lifecycle, if not, do nothing.
 *
 * @param fn
 */
function tryOnDestroy(fn) {
    if (tryGetCurrentComponent()) {
        onDestroy(fn);
    }
}

function writable(value, start = noop) {
    const s = writable$1(value, start);
    const runs = new Set();
    const invalidates = new Set();
    let unsubscribe;
    const prepareUnsubscribe = () => {
        unsubscribe = s.subscribe((val) => runAll([...runs], val), (val) => runAll([...invalidates], val));
    };
    if (tryGetCurrentComponent()) {
        prepareUnsubscribe();
    }
    function set(newValue) {
        s.set(newValue);
    }
    function update(fn) {
        s.update(fn);
    }
    function subscribe(run = noop, invalidate = noop) {
        if (!unsubscribe) {
            prepareUnsubscribe();
        }
        runs.add(run);
        invalidates.add(invalidate);
        const v = get(s);
        run(v);
        invalidate(v);
        return () => {
            runs.delete(run);
            invalidates.delete(invalidate);
        };
    }
    const stop = () => {
        runs.clear();
        invalidates.clear();
        if (unsubscribe) {
            unsubscribe();
        }
    };
    tryOnDestroy(stop);
    return {
        set,
        update,
        subscribe,
    };
}

const isClient = typeof window !== 'undefined';
const isDef = (val) => typeof val !== 'undefined';
const assert = (condition, ...infos) => {
    // eslint-disable-next-line no-console
    if (!condition)
        console.warn(...infos);
};
const toString = Object.prototype.toString;
const isBoolean = (val) => typeof val === 'boolean';
const isFunction = (val) => typeof val === 'function';
const isNumber = (val) => typeof val === 'number';
const isString = (val) => typeof val === 'string';
const isObject = (val) => toString.call(val) === '[object Object]';
const isWindow = (val) => typeof window !== 'undefined' && toString.call(val) === '[object Window]';
const isReadable = (store) => {
    return store && isFunction(store.subscribe);
};
const isWritable = (store) => {
    return (store && ['subscribe', 'set', 'update'].every((n) => isFunction(store[n])));
};
const now = () => Date.now();
const timestamp = () => +Date.now();
const clamp = (n, min, max) => Math.min(max, Math.max(min, n));
const noop = () => { };
const rand = (min, max) => {
    min = Math.ceil(min);
    max = Math.floor(max);
    return Math.floor(Math.random() * (max - min + 1)) + min;
};

/**
 *  Run a function
 */
const run = (fn, ...args) => {
    fn(...args);
};
/**
 * Run all functions
 */
const runAll = (fns, ...args) => {
    fns.forEach((fn) => run(fn, ...args));
};

/**
 * Silent `get_current_component`. Call `get_current_component()` without throw error.
 */
function tryGetCurrentComponent() {
    let currentComponent;
    try {
        currentComponent = get_current_component();
    }
    catch (_) { }
    return currentComponent;
}
function promiseTimeout(ms, throwOnTimeout = false, reason = 'Timeout') {
    return new Promise((resolve, reject) => {
        if (throwOnTimeout) {
            setTimeout(() => reject(reason), ms);
        }
        else {
            setTimeout(resolve, ms);
        }
    });
}
function unstore(val) {
    return isReadable(val) ? get(val) : val;
}
function toReadable(val) {
    if (isWritable(val)) {
        return {
            subscribe: val.subscribe,
        };
    }
    return isReadable(val) ? val : readable(val);
}
function toWritable(val) {
    return isWritable(val) ? val : writable(val);
}

function readable(value, start = noop) {
    return {
        subscribe: writable(value, start).subscribe,
    };
}

/**
 * Call `onMount()` if it's inside a component lifecycle, if not, run just call the function.
 *
 * @param fn
 */
function tryOnMount(fn) {
    if (tryGetCurrentComponent()) {
        onMount(fn);
    }
    else {
        const cb = fn() || noop;
        tryOnDestroy(cb);
    }
}

/**
 * Wrapper for `setInterval` with controls
 *
 * @param cb
 * @param interval
 * @param options
 */
function useIntervalFn(cb, interval = 1000, options = {}) {
    const { immediate = true, immediateCallback = false } = options;
    let timer = null;
    const isActive = writable(false);
    function clean() {
        if (timer) {
            clearInterval(timer);
            timer = null;
        }
    }
    function pause() {
        isActive.set(false);
        clean();
    }
    function resume() {
        if (interval <= 0) {
            return;
        }
        isActive.set(true);
        if (immediateCallback) {
            cb();
        }
        clean();
        timer = setInterval(cb, interval);
    }
    if (immediate && isClient) {
        resume();
    }
    tryOnDestroy(pause);
    return {
        isActive,
        pause,
        resume,
    };
}

function useInterval(interval = 1000, options = {}) {
    const { controls: exposeControls = false, immediate = true } = options;
    const counter = writable(0);
    const controls = useIntervalFn(() => {
        counter.update((c) => (c += 1));
    }, interval, { immediate });
    if (exposeControls) {
        return Object.assign({ counter }, controls);
    }
    return counter;
}

/**
 * Wrapper for `setTimeout` with controls.
 *
 * @param fn
 * @param interval
 * @param options
 */
function useTimeoutFn(cb, interval, options = {}) {
    const { immediate = true } = options;
    const isPending = writable(false);
    let timer = null;
    function clear() {
        if (timer) {
            clearTimeout(timer);
            timer = null;
        }
    }
    function stop() {
        isPending.set(false);
        clear();
    }
    function start(...args) {
        clear();
        isPending.set(true);
        timer = setTimeout(() => {
            isPending.set(false);
            timer = null;
            cb(...args);
        }, interval);
    }
    if (immediate) {
        isPending.set(true);
        if (isClient) {
            start();
        }
    }
    tryOnDestroy(stop);
    return {
        isPending,
        start,
        stop,
    };
}

function useTimeout(interval = 1000, options = {}) {
    const { controls: exposeControls = false } = options;
    const controls = useTimeoutFn(noop, interval, options);
    const ready = readable(true, (set) => {
        controls.isPending.subscribe((value) => set(!value));
    });
    if (exposeControls) {
        return Object.assign({ ready }, controls);
    }
    else {
        return ready;
    }
}

/**
 * Shorthand for watching value to be truthy
 *
 * @see https://svelte-use.vercel.app/shared/whenever
 */
function whenever(source, cb) {
    const store = toWritable(source);
    let ov;
    return store.subscribe((v) => {
        if (v) {
            cb(v, ov);
            ov = v;
        }
    });
}

export { assert, clamp, isBoolean, isClient, isDef, isFunction, isNumber, isObject, isReadable, isString, isWindow, isWritable, noop, now, promiseTimeout, rand, readable, run, runAll, timestamp, toReadable, toWritable, tryGetCurrentComponent, tryOnDestroy, tryOnMount, unstore, useInterval, useIntervalFn, useTimeout, useTimeoutFn, whenever, writable };