json-joy/esm/json-crdt-patch/Batch.js

Collection of libraries for building collaborative editing apps.

import { printTs } from './clock';
export class Batch {
    patches;
    constructor(patches) {
        this.patches = patches;
    }
    getId() {
        if (!this.patches.length)
            return undefined;
        return this.patches[0].getId();
    }
    rebase(serverTime) {
        const id = this.getId();
        if (!id)
            throw new Error('BATCH_EMPTY');
        const transformHorizon = id.time;
        const patches = this.patches;
        const length = patches.length;
        const newPatches = [];
        for (let i = 0; i < length; i++) {
            const patch = patches[i];
            newPatches.push(patch.rebase(serverTime, transformHorizon));
            serverTime += patch.span();
        }
        return new Batch(newPatches);
    }
    clone() {
        return new Batch(this.patches.map((patch) => patch.clone()));
    }
    toString(tab = '') {
        const id = this.getId();
        let out = `Batch ${id ? printTs(id) : '(nil)'}\n`;
        for (let i = 0; i < this.patches.length; i++) {
            const patch = this.patches[i];
            const isLast = i === this.patches.length - 1;
            out += `${tab}${isLast ? '└─' : '├─'} ${patch.toString(tab + `${isLast ? ' ' : '│'} `)}\n`;
        }
        return out;
    }
}