"use strict";
// -*- mode: js; indent-tabs-mode: nil; js-basic-offset: 4 -*-
//
// This file is part of Genie
//
// Copyright 2020 The Board of Trustees of the Leland Stanford Junior University
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Author: Giovanni Campagna <gcampagn@cs.stanford.edu>
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.ChannelStateBinder = exports.ChannelState = void 0;
const sql = __importStar(require("./sqlite"));
const Tp = __importStar(require("thingpedia"));
class ChannelState {
    constructor(platform, uniqueId) {
        this._db = sql.db(platform.getSqliteDB(), platform.getSqliteKey());
        this.uniqueId = uniqueId;
        this._cached = null;
    }
    read() {
        if (this._cached !== null)
            return this._cached;
        return this._cached = this._db.withTransaction((dbClient) => {
            return sql.selectOne(dbClient, "select value from channel where uniqueId = ?", [this.uniqueId]).then((row) => {
                if (row === undefined)
                    return null;
                else
                    return JSON.parse(row.value) || null;
            });
        });
    }
    write(value) {
        this._cached = Promise.resolve(value);
        return this._db.withTransaction((dbClient) => {
            let valueStr = JSON.stringify(value);
            if (valueStr === 'null' || valueStr === '{}')
                return sql.drop(dbClient, "delete from channel where uniqueId = ?", [this.uniqueId]);
            else
                return sql.insertOne(dbClient, "insert or replace into channel(uniqueId, value) values (?, ?)", [this.uniqueId, valueStr]);
        }).then(() => value);
    }
}
exports.ChannelState = ChannelState;
class ChannelStateBinder extends Tp.Helpers.RefCounted {
    constructor(platform) {
        super();
        this._platform = platform;
        this._cached = {};
        this.uniqueId = null;
        this._updateTimeout = null;
        this._state = null;
    }
    init(uniqueId) {
        this.uniqueId = uniqueId;
        this._state = new ChannelState(this._platform, uniqueId);
    }
    get(name) {
        return this._cached[name];
    }
    set(name, value) {
        this._cached[name] = value;
        this.changed();
    }
    durableSet(name, value) {
        this._cached[name] = value;
        clearTimeout(this._updateTimeout);
        return this.flushToDisk();
    }
    changed() {
        clearTimeout(this._updateTimeout);
        this._updateTimeout = setTimeout(this.flushToDisk.bind(this), 500);
    }
    flushToDisk() {
        if (!this._updateTimeout)
            return Promise.resolve();
        this._updateTimeout = null;
        return this._state.write(this._cached);
    }
    _doOpen() {
        return this._state.read().then((value) => {
            this._cached = value || {};
        });
    }
    _doClose() {
        clearTimeout(this._updateTimeout);
        return this.flushToDisk();
    }
}
exports.ChannelStateBinder = ChannelStateBinder;
//# sourceMappingURL=channel.js.map