path: root/src/Utils.ts

import * as uuid from 'uuid';

export function clamp(n: number, lower: number, upper: number) {
    return Math.max(lower, Math.min(upper, n));
}
export namespace Utils {
    export function GuestID() {
        return '__guest__';
    }
    export function GenerateGuid(): string {
        return uuid.v4();
    }

    export function GenerateDeterministicGuid(seed: string): string {
        return uuid.v5(seed, uuid.v5.URL);
    }

    export const loggingEnabled = false;
    export const logFilter: number | undefined = undefined;

    export function log(prefixIn: string, messageName: string, messageIn: any, receiving: boolean) {
        let prefix = prefixIn;
        let message = messageIn;
        if (!loggingEnabled) {
            return;
        }
        message = message || {};
        if (logFilter !== undefined && logFilter !== message.type) {
            return;
        }
        const idString = (message.id || '').padStart(36, ' ');
        prefix = prefix.padEnd(16, ' ');
        console.log(`${prefix}: ${idString}, ${receiving ? 'receiving' : 'sending'} ${messageName} with data ${JSON.stringify(message)} `);
    }

    export function loggingCallback(prefix: string, func: (args: any) => any, messageName: string) {
        return (args: any) => {
            log(prefix, messageName, args, true);
            func(args);
        };
    }

    export function TraceConsoleLog() {
        ['log', 'warn'].forEach(method => {
            const old = (console as any)[method];
            (console as any)[method] = function (...args: any[]) {
                let stack = new Error('').stack?.split(/\n/);
                // Chrome includes a single "Error" line, FF doesn't.
                if (stack && stack[0].indexOf('Error') === 0) {
                    stack = stack.slice(1);
                }
                const message = (stack?.[1] || 'Stack undefined!').trim();
                const newArgs = args.slice().concat([message]);
                return old.apply(console, newArgs);
            };
        });
    }

    export function rotPt(x: number, y: number, radAng: number) {
        return { x: x * Math.cos(radAng) - y * Math.sin(radAng), y: x * Math.sin(radAng) + y * Math.cos(radAng) };
    }

    export function getNearestPointInPerimeter(l: number, t: number, w: number, h: number, xIn: number, yIn: number) {
        const r = l + w;
        const b = t + h;

        const x = clamp(xIn, l, r);
        const y = clamp(yIn, t, b);

        const dl = Math.abs(x - l);
        const dr = Math.abs(x - r);
        const dt = Math.abs(y - t);
        const db = Math.abs(y - b);

        const m = Math.min(dl, dr, dt, db);

        return m === dt ? [x, t] : m === db ? [x, b] : m === dl ? [l, y] : [r, y];
    }
}
export function decimalToHexString(numberIn: number) {
    const number = numberIn < 0 ? 0xffffffff + numberIn + 1 : numberIn;
    return (number < 16 ? '0' : '') + number.toString(16).toUpperCase();
}

export function distanceBetweenHorizontalLines(xs: number, xe: number, y: number, xs2: number, xe2: number, y2: number): [number, number[]] {
    if ((xs2 <= xs && xe2 >= xs) || (xs2 <= xe && xe2 >= xe) || (xs2 >= xs && xe2 <= xe)) return [Math.abs(y - y2), [Math.max(xs, xs2), y, Math.min(xe, xe2), y]];
    if (xe2 <= xs) return [Math.sqrt((xe2 - xs) * (xe2 - xs) + (y2 - y) * (y2 - y)), [xs, y, xs, y]];
    // if (xs2 > xe)
    return [Math.sqrt((xs2 - xe) * (xs2 - xe) + (y2 - y) * (y2 - y)), [xe, y, xe, y]];
}
export function distanceBetweenVerticalLines(x: number, ys: number, ye: number, x2: number, ys2: number, ye2: number): [number, number[]] {
    if ((ys2 <= ys && ye2 >= ys) || (ys2 <= ye && ye2 >= ye) || (ys2 >= ys && ye2 <= ye)) return [Math.abs(x - x2), [x, Math.max(ys, ys2), x, Math.min(ye, ye2)]];
    if (ye2 <= ys) return [Math.sqrt((ye2 - ys) * (ye2 - ys) + (x2 - x) * (x2 - x)), [x, ys, x, ys]];
    // if (ys2 > ye)
    return [Math.sqrt((ys2 - ye) * (ys2 - ye) + (x2 - x) * (x2 - x)), [x, ye, x, ye]];
}

function project(px: number, py: number, ax: number, ay: number, bx: number, by: number) {
    if (ax === bx && ay === by) return { point: { x: ax, y: ay }, left: false, dot: 0, t: 0 };
    const atob = { x: bx - ax, y: by - ay };
    const atop = { x: px - ax, y: py - ay };
    const len = atob.x * atob.x + atob.y * atob.y;
    let dot = atop.x * atob.x + atop.y * atob.y;
    const t = Math.min(1, Math.max(0, dot / len));

    dot = (bx - ax) * (py - ay) - (by - ay) * (px - ax);

    return {
        point: {
            x: ax + atob.x * t,
            y: ay + atob.y * t,
        },
        left: dot < 1,
        dot: dot,
        t: t,
    };
}

export function closestPtBetweenRectangles(l: number, t: number, w: number, h: number, l1: number, t1: number, w1: number, h1: number, x: number, y: number) {
    const r = l + w;
    const b = t + h;
    const r1 = l1 + w1;
    const b1 = t1 + h1;
    const hsegs = [
        [l, r, t, l1, r1, t1],
        [l, r, b, l1, r1, t1],
        [l, r, t, l1, r1, b1],
        [l, r, b, l1, r1, b1],
    ];
    const vsegs = [
        [l, t, b, l1, t1, b1],
        [r, t, b, l1, t1, b1],
        [l, t, b, r1, t1, b1],
        [r, t, b, r1, t1, b1],
    ];
    const res = hsegs.reduce(
        (closest, seg) => {
            const dist = distanceBetweenHorizontalLines(seg[0], seg[1], seg[2], seg[3], seg[4], seg[5]);
            return dist[0] < closest[0] ? dist : closest;
        },
        [Number.MAX_VALUE, []] as [number, number[]]
    );
    const fres = vsegs.reduce((closest, seg) => {
        const dist = distanceBetweenVerticalLines(seg[0], seg[1], seg[2], seg[3], seg[4], seg[5]);
        return dist[0] < closest[0] ? dist : closest;
    }, res);

    const near = project(x, y, fres[1][0], fres[1][1], fres[1][2], fres[1][3]);
    return project(near.point.x, near.point.y, fres[1][0], fres[1][1], fres[1][2], fres[1][3]);
}

export function timenow() {
    const now = new Date();
    let ampm = 'am';
    let h = now.getHours();
    let m: any = now.getMinutes();
    if (h >= 12) {
        if (h > 12) h -= 12;
        ampm = 'pm';
    }
    if (m < 10) m = '0' + m;
    return now.toLocaleDateString() + ' ' + h + ':' + m + ' ' + ampm;
}

export function formatTime(timeIn: number) {
    const time = Math.round(timeIn);
    const hours = Math.floor(time / 60 / 60);
    const minutes = Math.floor(time / 60) - hours * 60;
    const seconds = time % 60;
    return (hours ? hours.toString() + ':' : '') + minutes.toString().padStart(2, '0') + ':' + seconds.toString().padStart(2, '0');
}

// x is furthest left, y is furthest top, r is furthest right, b is furthest bottom
export function aggregateBounds(boundsList: { x: number; y: number; width?: number; height?: number }[], xpad: number, ypad: number) {
    const bounds = boundsList
        .map(b => ({ x: b.x, y: b.y, r: b.x + (b.width || 0), b: b.y + (b.height || 0) }))
        .reduce(
            (prevBounds, b) => ({
                x: Math.min(b.x, prevBounds.x),
                y: Math.min(b.y, prevBounds.y),
                r: Math.max(b.r, prevBounds.r),
                b: Math.max(b.b, prevBounds.b),
            }),
            { x: Number.MAX_VALUE, y: Number.MAX_VALUE, r: -Number.MAX_VALUE, b: -Number.MAX_VALUE }
        );
    return {
        x: bounds.x !== Number.MAX_VALUE ? bounds.x - xpad : bounds.x,
        y: bounds.y !== Number.MAX_VALUE ? bounds.y - ypad : bounds.y,
        r: bounds.r !== -Number.MAX_VALUE ? bounds.r + xpad : bounds.r,
        b: bounds.b !== -Number.MAX_VALUE ? bounds.b + ypad : bounds.b,
    };
}
export function intersectRect(r1: { left: number; top: number; width: number; height: number }, r2: { left: number; top: number; width: number; height: number }) {
    return !(r2.left > r1.left + r1.width || r2.left + r2.width < r1.left || r2.top > r1.top + r1.height || r2.top + r2.height < r1.top);
}

export function stringHash(s?: string) {
    // eslint-disable-next-line no-bitwise
    return !s ? undefined : Math.abs(s.split('').reduce((a: any, b: any) => (n => n & n)((a << 5) - a + b.charCodeAt(0)), 0));
}

export function percent2frac(percent: string) {
    return Number(percent.substr(0, percent.length - 1)) / 100;
}
export type Without<T, K extends keyof T> = Pick<T, Exclude<keyof T, K>>;

export type Predicate<K, V> = (entry: [K, V]) => boolean;

export function numberRange(num: number) {
    return num > 0 && num < 1000 ? Array.from(Array(num)).map((v, i) => i) : [];
}

export function emptyFunction() {
    return undefined;
}

export const emptyPath: any[] = [];

export function unimplementedFunction() {
    throw new Error('This function is not implemented, but should be.');
}

export function DeepCopy<K, V>(source: Map<K, V>, predicate?: Predicate<K, V>) {
    const deepCopy = new Map<K, V>();
    const entries = source.entries();
    let next = entries.next();
    while (!next.done) {
        const entry = next.value;
        if (!predicate || predicate(entry)) {
            deepCopy.set(entry[0], entry[1]);
        }
        next = entries.next();
    }
    return deepCopy;
}

export namespace JSONUtils {
    export function tryParse(source: string) {
        let results: any;
        try {
            results = JSON.parse(source);
        } catch (e) {
            results = source;
        }
        return results;
    }
}

/**
 * Helper method for converting pixel string eg. '32px' into number eg. 32
 * @param value: string with 'px' ending
 * @returns value: number
 *
 * Example:
 * '32px' -> 32
 */
export function numberValue(value: string | undefined): number {
    if (value === undefined) return 0;
    return parseInt(value);
}

export function numbersAlmostEqual(num1: number, num2: number) {
    return Math.abs(num1 - num2) < 0.2;
}