@ngneat/transloco
Version:
The internationalization (i18n) library for Angular
131 lines • 17.5 kB
JavaScript
import { Inject, inject, Injectable, InjectionToken, Injector, Optional, } from '@angular/core';
import { getValue, isDefined, isObject, isString, setValue } from './helpers';
import { defaultConfig, TRANSLOCO_CONFIG, } from './transloco.config';
import * as i0 from "@angular/core";
export const TRANSLOCO_TRANSPILER = new InjectionToken('TRANSLOCO_TRANSPILER');
export class DefaultTranspiler {
interpolationMatcher;
// TODO use inject in Transloco v7
constructor(config) {
this.interpolationMatcher = resolveMatcher(config ?? defaultConfig);
}
transpile(value, params = {}, translation, key) {
if (isString(value)) {
return value.replace(this.interpolationMatcher, (_, match) => {
match = match.trim();
if (isDefined(params[match])) {
return params[match];
}
return isDefined(translation[match])
? this.transpile(translation[match], params, translation, key)
: '';
});
}
else if (params) {
if (isObject(value)) {
value = this.handleObject(value, params, translation, key);
}
else if (Array.isArray(value)) {
value = this.handleArray(value, params, translation, key);
}
}
return value;
}
/**
*
* @example
*
* const en = {
* a: {
* b: {
* c: "Hello {{ value }}"
* }
* }
* }
*
* const params = {
* "b.c": { value: "Transloco "}
* }
*
* service.selectTranslate('a', params);
*
* // the first param will be the result of `en.a`.
* // the second param will be `params`.
* parser.transpile(value, params, {});
*
*
*/
handleObject(value, params = {}, translation, key) {
let result = value;
Object.keys(params).forEach((p) => {
// get the value of "b.c" inside "a" => "Hello {{ value }}"
const v = getValue(result, p);
// get the params of "b.c" => { value: "Transloco" }
const getParams = getValue(params, p);
// transpile the value => "Hello Transloco"
const transpiled = this.transpile(v, getParams, translation, key);
// set "b.c" to `transpiled`
result = setValue(result, p, transpiled);
});
return result;
}
handleArray(value, params = {}, translation, key) {
return value.map((v) => this.transpile(v, params, translation, key));
}
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.7", ngImport: i0, type: DefaultTranspiler, deps: [{ token: TRANSLOCO_CONFIG, optional: true }], target: i0.ɵɵFactoryTarget.Injectable });
static ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.1.7", ngImport: i0, type: DefaultTranspiler });
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.7", ngImport: i0, type: DefaultTranspiler, decorators: [{
type: Injectable
}], ctorParameters: function () { return [{ type: undefined, decorators: [{
type: Optional
}, {
type: Inject,
args: [TRANSLOCO_CONFIG]
}] }]; } });
function resolveMatcher(config) {
const [start, end] = config.interpolation;
return new RegExp(`${start}(.*?)${end}`, 'g');
}
export function getFunctionArgs(argsString) {
const splitted = argsString ? argsString.split(',') : [];
const args = [];
for (let i = 0; i < splitted.length; i++) {
let value = splitted[i].trim();
while (value[value.length - 1] === '\\') {
i++;
value = value.replace('\\', ',') + splitted[i];
}
args.push(value);
}
return args;
}
export class FunctionalTranspiler extends DefaultTranspiler {
injector = inject(Injector);
transpile(value, params = {}, translation, key) {
let transpiled = value;
if (isString(value)) {
transpiled = value.replace(/\[\[\s*(\w+)\((.*?)\)\s*]]/g, (match, functionName, args) => {
try {
const func = this.injector.get(functionName);
return func.transpile(...getFunctionArgs(args));
}
catch (e) {
let message = `There is an error in: '${value}'.
Check that the you used the right syntax in your translation and that the implementation of ${functionName} is correct.`;
if (e.message.includes('NullInjectorError')) {
message = `You are using the '${functionName}' function in your translation but no provider was found!`;
}
throw new Error(message);
}
});
}
return super.transpile(transpiled, params, translation, key);
}
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.7", ngImport: i0, type: FunctionalTranspiler, deps: null, target: i0.ɵɵFactoryTarget.Injectable });
static ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.1.7", ngImport: i0, type: FunctionalTranspiler });
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.7", ngImport: i0, type: FunctionalTranspiler, decorators: [{
type: Injectable
}] });
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defaultConfig);\n  }\n\n  transpile(\n    value: any,\n    params: HashMap = {},\n    translation: Translation,\n    key: string\n  ): any {\n    if (isString(value)) {\n      return value.replace(this.interpolationMatcher, (_, match) => {\n        match = match.trim();\n        if (isDefined(params[match])) {\n          return params[match];\n        }\n\n        return isDefined(translation[match])\n          ? this.transpile(translation[match], params, translation, key)\n          : '';\n      });\n    } else if (params) {\n      if (isObject(value)) {\n        value = this.handleObject(value, params, translation, key);\n      } else if (Array.isArray(value)) {\n        value = this.handleArray(value, params, translation, key);\n      }\n    }\n\n    return value;\n  }\n\n  /**\n   *\n   * @example\n   *\n   * const en = {\n   *  a: {\n   *    b: {\n   *      c: \"Hello {{ value }}\"\n   *    }\n   *  }\n   * }\n   *\n   * const params =  {\n   *  \"b.c\": { value: \"Transloco \"}\n   * }\n   *\n   * service.selectTranslate('a', params);\n   *\n   * // the first param will be the result of `en.a`.\n   * // the second param will be `params`.\n   * parser.transpile(value, params, {});\n   *\n   *\n   */\n  protected handleObject(\n    value: any,\n    params: HashMap = {},\n    translation: Translation,\n    key: string\n  ) {\n    let result = value;\n\n    Object.keys(params).forEach((p) => {\n      // get the value of \"b.c\" inside \"a\" => \"Hello {{ value }}\"\n      const v = getValue(result, p);\n      // get the params of \"b.c\" => { value: \"Transloco\" }\n      const getParams = getValue(params, p);\n\n      // transpile the value => \"Hello Transloco\"\n      const transpiled = this.transpile(v, getParams, translation, key);\n\n      // set \"b.c\" to `transpiled`\n      result = setValue(result, p, transpiled);\n    });\n\n    return result;\n  }\n\n  protected handleArray(\n    value: string[],\n    params: HashMap = {},\n    translation: Translation,\n    key: string\n  ) {\n    return value.map((v) => this.transpile(v, params, translation, key));\n  }\n}\n\nfunction resolveMatcher(config: TranslocoConfig): RegExp {\n  const [start, end] = config.interpolation;\n\n  return new RegExp(`${start}(.*?)${end}`, 'g');\n}\n\nexport interface TranslocoTranspilerFunction {\n  transpile(...args: string[]): any;\n}\n\nexport function getFunctionArgs(argsString: string): string[] {\n  const splitted = argsString ? argsString.split(',') : [];\n  const args = [];\n  for (let i = 0; i < splitted.length; i++) {\n    let value = splitted[i].trim();\n    while (value[value.length - 1] === '\\\\') {\n      i++;\n      value = value.replace('\\\\', ',') + splitted[i];\n    }\n    args.push(value);\n  }\n\n  return args;\n}\n\n@Injectable()\nexport class FunctionalTranspiler\n  extends DefaultTranspiler\n  implements TranslocoTranspiler\n{\n  protected injector = inject(Injector);\n\n  transpile(\n    value: any,\n    params: HashMap = {},\n    translation: Translation,\n    key: string\n  ): any {\n    let transpiled = value;\n    if (isString(value)) {\n      transpiled = value.replace(\n        /\\[\\[\\s*(\\w+)\\((.*?)\\)\\s*]]/g,\n        (match: string, functionName: string, args: string) => {\n          try {\n            const func: TranslocoTranspilerFunction =\n              this.injector.get(functionName);\n\n            return func.transpile(...getFunctionArgs(args));\n          } catch (e: any) {\n            let message = `There is an error in: '${value}'. \n                          Check that the you used the right syntax in your translation and that the implementation of ${functionName} is correct.`;\n            if (e.message.includes('NullInjectorError')) {\n              message = `You are using the '${functionName}' function in your translation but no provider was found!`;\n            }\n            throw new Error(message);\n          }\n        }\n      );\n    }\n\n    return super.transpile(transpiled, params, translation, key);\n  }\n}\n"]}