first commit

.gitignore

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+node_modules/
+.vscode/
+yarn.lock
+yarn-error.log

README.md

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+-- 依赖 lodash.js

babel.config.js

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+module.exports = {
+    presets: [
+        ['@babel/preset-env'],
+    ],
+    plugins: [
+        "@babel/plugin-proposal-class-properties"
+    ]
+}

jest.config.js

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+module.exports = {
+};

package.json

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+{
+  "name": "jbase62",
+  "version": "1.0.0",
+  "main": "dist/jBase62.js",
+  "module": "src/index.js",
+  "author": "what-00@qq.com",
+  "license": "MIT",
+  "scripts": {
+    "test": "jest --verbose ./test",
+    "build": "webpack --config webpack.config.js"
+  },
+  "devDependencies": {
+    "@babel/core": "^7.8.4",
+    "@babel/plugin-proposal-class-properties": "^7.18.6",
+    "@babel/preset-env": "^7.8.4",
+    "@types/jest": "^29.5.0",
+    "babel-jest": "^29.5.0",
+    "babel-loader": "^8.0.6",
+    "jest": "^29.5.0",
+    "webpack": "4.41.6",
+    "webpack-cli": "3.3.11"
+  },
+  "dependencies": {
+    "base-x": "^4.0.0",
+    "jsonpack": "^1.1.5",
+    "lodash": "^4.17.21",
+    "merge": "^2.1.1"
+  }
+}

src/index.js

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+import _ from 'lodash';
+import jsonpack from 'jsonpack';
+import merge from 'deepmerge';
+import basex from 'base-x';
+
+
+class JBase62 {
+    static #instance = null
+
+    static getInstance = (characters = null) => {
+        if (characters || !JBase62.#instance) {
+            JBase62.#instance = new JBase62(characters)
+        }
+        return JBase62.#instance
+    }
+
+    #basex = null
+
+    constructor(characters = "") {
+        if (!characters && !JBase62.#instance) {
+            throw new "characters is required"
+        }
+
+        if (characters) {
+            this.#basex = basex(characters)
+        } else if (JBase62.#instance) {
+            return JBase62.#instance
+        }
+    }
+
+    encode = (json = {}) => {
+        const jsonString = JSON.stringify(json, (__, v) => v === undefined ? null : v)
+        const binaryString = jsonpack.pack(jsonString)
+        return this.#basex.encode(Buffer.from(binaryString))
+    }
+
+    decode = (base62 = '', defaultValue = {}) => {
+        if (base62 === undefined || base62 === '') {
+            return defaultValue
+        }
+
+        try {
+            const binaryString = this.#basex.decode(base62).reduce((carry, bin) => carry + String.fromCharCode(bin), "")
+            const jsonString = jsonpack.unpack(binaryString)
+            return typeof (jsonString) === 'string' ? JSON.parse(jsonString) : jsonString
+        } catch (e) {
+            console.warn('JBase62.decode', e)
+            return defaultValue
+        }
+    }
+
+    get = (base62, path, defaultValue) => _.get(this.decode(base62), path, defaultValue)
+
+    set = (base62, path, value) => {
+        const obj = this.decode(base62)
+        _.set(obj, path, value)
+        return this.encode(obj)
+    }
+
+    assign = (base62, data = {}, isDeepMerge = false) => this.encode(isDeepMerge ? merge(this.decode(base62), data) : Object.assign(this.decode(base62), data))
+}
+
+export default JBase62

test/index.test.js

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+import { describe, expect, test } from '@jest/globals';
+import JBase62 from "../src";
+
+test('encode example 1', () => {
+    const x = JBase62.getInstance("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")
+    expect(x.encode({ A: 123 })).toEqual("6N4GIxiF9tHa12D")
+
+    const xx = JBase62.getInstance("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789")
+    expect(xx.encode({ A: 123 })).toEqual("GXEQS7sPJ3RkBCN")
+});
+
+test('encode example 2', () => {
+    const x = JBase62.getInstance("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")
+    expect(x.encode({ A: 123 })).toEqual("6N4GIxiF9tHa12D")
+
+    // 是用最后一次的 characters
+    const xx = JBase62.getInstance()
+    // expect(xx.encode({ A: 123 })).toEqual("GXEQS7sPJ3RkBCN")
+    expect(xx.encode({ A: 123 })).toEqual("6N4GIxiF9tHa12D")
+});
+
+test('encode example 3', () => {
+    const x = JBase62.getInstance("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")
+
+    // set
+    expect(x.set("6N4GIxiF9tHa12D", "a.b", 888)).toEqual("C2pN4cIiUNzT0X9EvQYWqK53E4r368y9hsb")
+
+    // decode
+    expect(x.decode("C2pN4cIiUNzT0X9EvQYWqK53E4r368y9hsb")).toEqual({ A: 123, a: { b: 888 } })
+
+    // get
+    expect(x.get("C2pN4cIiUNzT0X9EvQYWqK53E4r368y9hsb", "a.b")).toEqual(888)
+
+    // assign
+    expect(x.assign("C2pN4cIiUNzT0X9EvQYWqK53E4r368y9hsb", { a: { c: 333 } })).toEqual("C2pN4cL9JKMyAdG8e5JWK3Z3cDQtawtYziX")
+    expect(x.decode("C2pN4cL9JKMyAdG8e5JWK3Z3cDQtawtYziX")).toEqual({ A: 123, a: { c: 333 } })
+
+    // merge
+    expect(x.assign("C2pN4cIiUNzT0X9EvQYWqK53E4r368y9hsb", { a: { c: 333 } }, true)).toEqual("Hd9OGloH4qT5y8F6q9rSqeLiTMwJLFdQbq7UrjP2I1ZmTSH")
+    expect(x.decode("Hd9OGloH4qT5y8F6q9rSqeLiTMwJLFdQbq7UrjP2I1ZmTSH")).toEqual({ A: 123, a: { b: 888, c: 333 } })
+});

webpack.config.js

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+const path = require('path');
+
+module.exports = {
+    mode: 'production',
+    devtool: 'nosources-source-map',
+    entry: './src/index.js',
+    externals: ['lodash'],
+    output: {
+        path: path.resolve(__dirname, 'dist'),
+        filename: 'jbase62.js',
+        library: "JBase62",
+        libraryExport: 'default',
+        libraryTarget: 'umd',
+    },
+    module: {
+        rules: [
+            {
+                test: /\.js$/,
+                exclude: /node_modules/,
+                use: {
+                    loader: 'babel-loader',
+                    options: {
+                        presets: ['@babel/preset-env'],
+                    }
+                }
+            }
+        ]
+    },
+    externals: {
+        'lodash': '_',
+    }
+};