initialize commit

Author: teramotodaiki

.gitignore

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+node_modules
+lib

.prettierignore

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+*.json

.prettierrc

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+{
+  "singleQuote": true
+}

package-lock.json

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+{
+  "name": "@hackforplay/log",
+  "version": "1.0.0",
+  "description": "Logger for hackforplay written in TS.",
+  "main": "lib/index.js",
+  "scripts": {
+    "build": "tsc",
+    "test": "ava",
+    "watch": "ava --watch"
+  },
+  "author": "HackforPlay, Inc.",
+  "license": "MIT",
+  "ava": {
+    "compileEnhancements": false,
+		"extensions": [
+      "ts"
+    ],
+    "files": [
+      "./src/*.test.ts"
+    ],
+ 		"require": [
+      "ts-node/register/transpile-only"
+		]
+  },
+  "dependencies": {
+    "global": "^4.4.0"
+  },
+  "devDependencies": {
+    "ava": "^2.3.0",
+    "ts-node": "^8.3.0",
+    "typescript": "^3.6.2"
+  }
+}

package.json

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+import test from 'ava';
+import { createLogger } from '.';
+
+test('Create with same keys', t => {
+  const logger1 = createLogger();
+  const logger2 = createLogger();
+
+  t.is(logger1, logger2);
+});
+
+test('Create with different keys', t => {
+  const logger1 = createLogger('1');
+  const logger2 = createLogger('2');
+
+  t.not(logger1, logger2);
+});

src/index.test.ts

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+import g from 'global';
+import { Logger } from './logger';
+
+export function createLogger<T = IDefaultStructure>(
+  primaryKey = 'Unique primary key used by @hackforplay/log'
+) {
+  if (primaryKey in g) {
+    return g[primaryKey] as Logger<T>;
+  }
+
+  const logger = new Logger<T>();
+  g[primaryKey] = logger;
+  return logger;
+}
+
+export interface IDefaultStructure {
+  payload: string;
+}

src/index.ts

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+import test from 'ava';
+import { Logger } from './logger';
+
+test('Instantiate', t => {
+  t.notThrows(() => {
+    new Logger();
+  });
+});

src/logger.test.ts

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+export type S<Structure> = (log: Structure) => void;
+
+export class Logger<Structure> {
+  private logs: Structure[] = [];
+  private subscribers: Set<S<Structure>> = new Set();
+
+  append(log: Structure) {
+    this.logs.push(log);
+    this.subscribers.forEach(subscriber => {
+      subscriber(log);
+    });
+  }
+
+  subscribe(subscriber: (log: Structure) => void): () => void {
+    for (const log of this.logs) {
+      subscriber(log);
+    }
+
+    this.subscribers.add(subscriber);
+    return () => {
+      this.subscribers.delete(subscriber);
+    };
+  }
+}

src/logger.ts

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+{
+  "compilerOptions": {
+    /* Basic Options */
+    // "incremental": true,                   /* Enable incremental compilation */
+    "target": "es2015",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
+    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
+    // "lib": [],                             /* Specify library files to be included in the compilation. */
+    // "allowJs": true,                       /* Allow javascript files to be compiled. */
+    // "checkJs": true,                       /* Report errors in .js files. */
+    // "jsx": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
+    // "declaration": true,                   /* Generates corresponding '.d.ts' file. */
+    // "declarationMap": true,                /* Generates a sourcemap for each corresponding '.d.ts' file. */
+    // "sourceMap": true,                     /* Generates corresponding '.map' file. */
+    // "outFile": "./",                       /* Concatenate and emit output to single file. */
+    "outDir": "./lib",                        /* Redirect output structure to the directory. */
+    // "rootDir": "./",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
+    // "composite": true,                     /* Enable project compilation */
+    // "tsBuildInfoFile": "./",               /* Specify file to store incremental compilation information */
+    // "removeComments": true,                /* Do not emit comments to output. */
+    // "noEmit": true,                        /* Do not emit outputs. */
+    // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
+    // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
+    // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
+
+    /* Strict Type-Checking Options */
+    "strict": true,                           /* Enable all strict type-checking options. */
+    // "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
+    // "strictNullChecks": true,              /* Enable strict null checks. */
+    // "strictFunctionTypes": true,           /* Enable strict checking of function types. */
+    // "strictBindCallApply": true,           /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
+    // "strictPropertyInitialization": true,  /* Enable strict checking of property initialization in classes. */
+    // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
+    // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */
+
+    /* Additional Checks */
+    // "noUnusedLocals": true,                /* Report errors on unused locals. */
+    // "noUnusedParameters": true,            /* Report errors on unused parameters. */
+    // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
+    // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
+
+    /* Module Resolution Options */
+    // "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
+    // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
+    // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
+    // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
+    "typeRoots": ["types"],                       /* List of folders to include type definitions from. */
+    // "types": [],                           /* Type declaration files to be included in compilation. */
+    // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
+    "esModuleInterop": true                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
+    // "allowUmdGlobalAccess": true,          /* Allow accessing UMD globals from modules. */
+
+    /* Source Map Options */
+    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
+    // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
+
+    /* Experimental Options */
+    // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
+    // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
+  },
+  "include": ["src", "types"],
+  "exclude": ["src/*.test.ts"]
+}

tsconfig.json

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+declare module 'global' {
+  var global: any;
+  export default global;
+}