feat: add support mega feature for multi-lang

.github/workflows/continuous-deployment-workflow.yml

@@ -12,6 +12,8 @@ jobs:
         with:
           registry-url: https://registry.npmjs.org
       - run: npm ci --ignore-scripts
+      - run: npm run i18n:extract
+      - run: npm run i18n:fix
       - run: npm run prettier:check
       - run: npm run lint:check
       - run: npm run test:ci
@@ -20,6 +22,7 @@ jobs:
       - run: npm run build:cjs
       - run: npm run build:umd
       - run: npm run build:types
+      - run: cp -r i18n build
       - run: cp LICENSE build/LICENSE
       - run: cp README.md build/README.md
       - run: jq 'del(.devDependencies) | del(.scripts)' package.json > build/package.json

.github/workflows/continuous-integration-workflow.yml

@@ -8,6 +8,8 @@ jobs:
       - uses: actions/checkout@v1
       - uses: actions/setup-node@v1
       - run: npm ci --ignore-scripts
+      - run: npm run i18n:extract
+      - run: npm run i18n:fix
       - run: npm run prettier:check
       - run: npm run lint:check
   tests:
@@ -24,6 +26,7 @@ jobs:
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm ci --ignore-scripts
+      - run: npm run i18n:extract
       - run: npm run test:ci
       - run: npm install codecov -g
         if: ${{ matrix.node-version == '14.x' }}
@@ -36,6 +39,8 @@ jobs:
       - uses: actions/checkout@v1
       - uses: actions/setup-node@v1
       - run: npm ci --ignore-scripts
+      - run: npm run i18n:extract
+      - run: npm run i18n:fix
       - run: npm run build:es2015
       - run: npm run build:esm5
       - run: npm run build:cjs

.gitignore

@@ -50,3 +50,6 @@ temp
 # Files for playing around locally
 playground.ts
 playground.js
+
+# Buided json dictionaries of i18n
+i18n/**/*.json

README.md

@@ -4,6 +4,7 @@
 [![codecov](https://codecov.io/gh/typestack/class-validator/branch/develop/graph/badge.svg)](https://codecov.io/gh/typestack/class-validator)
 [![npm version](https://badge.fury.io/js/class-validator.svg)](https://badge.fury.io/js/class-validator)
 [![install size](https://packagephobia.now.sh/badge?p=class-validator)](https://packagephobia.now.sh/result?p=class-validator)
+[![Crowdin](https://badges.crowdin.net/class-validator/localized.svg)](https://crowdin.com/project/class-validator)
 
 Allows use of decorator and non-decorator based validation.
 Internally uses [validator.js][1] to perform validation.
@@ -37,6 +38,7 @@ Class-validator works on both browser and node.js platforms.
   - [Validation decorators](#validation-decorators)
   - [Defining validation schema without decorators](#defining-validation-schema-without-decorators)
   - [Validating plain objects](#validating-plain-objects)
+  - [Basic support i18n](#basic-support-i18n)
   - [Samples](#samples)
   - [Extensions](#extensions)
   - [Release notes](#release-notes)
@@ -989,6 +991,185 @@ Here is an example of using it:
 
 Due to nature of the decorators, the validated object has to be instantiated using `new Class()` syntax. If you have your class defined using class-validator decorators and you want to validate plain JS object (literal object or returned by JSON.parse), you need to transform it to the class instance via using [class-transformer](https://github.com/pleerock/class-transformer)).
 
+## Basic support i18n
+
+Translations created with the machine, if you found the mistake please add a new version of translate and write a comment in the right panel in https://crowdin.com/
+
+Basic set custom messages
+
+```typescript
+import { IsOptional, Equals, Validator } from 'class-validator';
+
+class MyClass {
+  @IsOptional()
+  @Equals('test')
+  title: string = 'bad_value';
+}
+
+const RU_I18N_MESSAGES = {
+  '$property must be equal to $constraint1': '$property должно быть равно $constraint1',
+};
+
+const model = new MyClass();
+
+validator.validate(model, messages: RU_I18N_MESSAGES).then(errors => {
+  console.log(errors[0].constraints);
+  // out: title должно быть равно test
+});
+```
+
+Load from file
+
+```typescript
+import { IsOptional, Equals, Validator } from 'class-validator';
+import { readFileSync } from 'fs';
+import { resolve } from 'path';
+
+class MyClass {
+  @IsOptional()
+  @Equals('test')
+  title: string = 'bad_value';
+}
+
+const RU_I18N_MESSAGES = JSON.parse(readFileSync(resolve(__dirname, './node_modules/class-validator/i18n/ru.json')).toString());
+
+const model = new MyClass();
+
+validator.validate(model, messages: RU_I18N_MESSAGES).then(errors => {
+  console.log(errors[0].constraints);
+  // out: title должен быть равен test
+});
+```
+
+With override
+
+```typescript
+import { IsOptional, Equals, Validator, setClassValidatorMessages } from 'class-validator';
+
+class MyClass {
+  @IsOptional()
+  @Equals('test')
+  title: string = 'bad_value';
+}
+
+setClassValidatorMessages({
+  '$property must be equal to $constraint1': '$property должно быть равно $constraint1',
+});
+
+const model = new MyClass();
+
+validator.validate(model).then(errors => {
+  console.log(errors[0].constraints);
+  // out: title должно быть равно test
+});
+```
+
+With change property name
+
+```typescript
+import { IsOptional, Equals, ClassPropertyTitle, validator } from 'class-validator';
+
+class MyClass {
+  @IsOptional()
+  @Equals('test')
+  @ClassPropertyTitle('property "title"')
+  title: string = 'bad_value';
+}
+
+const RU_I18N_MESSAGES = {
+  '$property must be equal to $constraint1': '$property должно быть равно $constraint1',
+};
+const RU_I18N_TITLES = {
+  'property "title"': 'поле "заголовок"',
+};
+
+const model = new MyClass();
+
+validator.validate(model, { messages: RU_I18N_MESSAGES, titles: RU_I18N_TITLES }).then(errors => {
+  console.log(errors[0].constraints);
+  // out: поле "заголовок" должно быть равно test
+});
+```
+
+With change target name
+
+```typescript
+import { IsOptional, Equals, ClassPropertyTitle, validator } from 'class-validator';
+
+@ClassTitle('object "MyClass"')
+class MyClass {
+  @IsOptional()
+  @Equals('test')
+  title: string = 'bad_value';
+}
+
+const RU_I18N_MESSAGES = {
+  '$property must be equal to $constraint1': '$property в $target должно быть равно $constraint1',
+};
+const RU_I18N_TITLES = {
+  'object "MyClass"': 'объекте "МойКласс"',
+};
+
+const model = new MyClass();
+
+validator.validate(model, { messages: RU_I18N_MESSAGES, titles: RU_I18N_TITLES }).then(errors => {
+  console.log(errors[0].constraints);
+  // out: title в объекте "МойКласс" должно быть равно test
+});
+```
+
+With change arguments for validation decorator
+
+```typescript
+import { IsOptional, Equals, validator } from 'class-validator';
+
+class MyClass {
+  @IsOptional()
+  @Equals('test')
+  title: string = 'bad_value';
+}
+
+const RU_I18N_MESSAGES = {
+  '$property must be equal to $constraint1': '$property должно быть равно $constraint1',
+};
+const RU_I18N_TITLES = {
+  test: '"тест"',
+};
+
+const model = new MyClass();
+
+validator.validate(model, { messages: RU_I18N_MESSAGES, titles: RU_I18N_TITLES }).then(errors => {
+  console.log(errors[0].constraints);
+  // out: title должно быть равно "тест"
+});
+```
+
+With change value
+
+```typescript
+import { IsOptional, Equals, validator } from 'class-validator';
+
+class MyClass {
+  @IsOptional()
+  @Equals('test')
+  title: string = 'bad_value';
+}
+
+const RU_I18N_MESSAGES = {
+  '$property must be equal to $constraint1': '$property равно $value, а должно быть равно $constraint1',
+};
+const RU_I18N_TITLES = {
+  bad_value: '"плохое_значение"',
+};
+
+const model = new MyClass();
+
+validator.validate(model, { messages: RU_I18N_MESSAGES, titles: RU_I18N_TITLES }).then(errors => {
+  console.log(errors[0].constraints);
+  // out: title равно "плохое_значение", а должно быть равно test
+});
+```
+
 ## Samples
 
 Take a look on samples in [./sample](https://github.com/pleerock/class-validator/tree/master/sample) for more examples of

crowdin.yml

@@ -0,0 +1,3 @@
+files:
+    - source: '*.pot'
+      translation: /%original_path%/%two_letters_code%.po