vk-bridge-level/lib/iterators/full_iterator.js

Level abstraction for VK Bridge

var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
import { AbstractIterator } from 'abstract-level';
export class VkBridgeIterator extends AbstractIterator {
    constructor(db, options) {
        super(db, options);
        this.innerIterator = db.keys(options);
    }
    _next(callback) {
        this.innerIterator.next().then((key) => __awaiter(this, void 0, void 0, function* () {
            if (key !== undefined) {
                const value = yield this.db.get(key);
                if (value !== undefined) {
                    return this.db.nextTick(callback, null, key, value);
                }
            }
            this.db.nextTick(callback, null);
        }));
    }
    _nextv(size, options, callback) {
        this.innerIterator.nextv(size, options).then((keys) => __awaiter(this, void 0, void 0, function* () {
            const values = yield this.db.getMany(keys);
            const results = keys.reduce((acc, key, index) => {
                acc.push([key, values[index]]);
                return acc;
            }, []);
            return this.db.nextTick(callback, null, results);
        }));
    }
    _seek(target, options) {
        this.innerIterator.seek(target, options);
    }
}