simple2k13/dist/functions/IndexedDB/index.js

some simple functions

/** @format */
class IndexedDB {
    db;
    dbName;
    storeName;
    version;
    constructor(dbName, storeName, version = 1) {
        this.db = undefined;
        this.dbName = dbName;
        this.storeName = storeName;
        this.version = version;
    }
    open() {
        return new Promise((resolve, reject) => {
            const myIndexedDB = 
            // @ts-ignore
            indexedDB || webkitIndexedDB || mozIndexedDB || msIndexedDB;
            if (!myIndexedDB) {
                const error = new Error("IndexedDB is not supported");
                console.warn(error);
                return reject(error);
            }
            const res = myIndexedDB.open(this.dbName, this.version);
            res.onsuccess = (event) => {
                // @ts-ignore
                this.db = event.target?.result; // 数据库对象
                resolve(event);
            };
            res.onerror = function (event) {
                reject(event);
                console.log("数据库打开失败...");
            };
            res.onupgradeneeded = (event) => {
                // 数据库创建或升级的时候会触发
                const storeName = this.storeName;
                // @ts-ignore
                const db = event.target?.result;
                if (!db.objectStoreNames.contains(storeName)) {
                    db.createObjectStore(storeName); // 创建表
                }
            };
        });
    }
    dispatch(func, options = {}, ...args) {
        const { mode = "readwrite", more = false } = options;
        return new Promise((resolve, reject) => {
            try {
                const objectStore = this.getObjectStore(mode);
                const storePrototype = objectStore[func];
                if (!(func in objectStore)) {
                    return reject(`${func} is undefined, reference resources:https://developer.mozilla.org/zh-CN/docs/Web/API/IDBObjectStore`);
                }
                if (typeof storePrototype === "function") {
                    // @ts-ignore
                    const res = objectStore[func](...args);
                    res.onsuccess = (event) => {
                        // @ts-ignore
                        const result = event.target?.result;
                        resolve(more
                            ? {
                                res,
                                event,
                                result,
                                objectStore,
                                bd: this.db,
                            }
                            : result);
                    };
                    res.onerror = reject;
                }
                else {
                    resolve(storePrototype);
                }
            }
            catch (error) {
                reject({
                    message: error,
                    arguments: { func, options, args },
                });
            }
        });
    }
    getObjectStore(mode = "readwrite") {
        if (!this.db) {
            throw new Error("No database connection available , please use IndexedDB=>open to connect");
        }
        const transaction = this.db.transaction([this.storeName], mode); // 事务
        const objectStore = transaction.objectStore(this.storeName); // 仓库对象
        return objectStore;
    }
}
export default IndexedDB;
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