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All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n\n/**\n * Extract i18n messages from source code\n */\n// Must be imported first, because Angular decorators throw on load.\nimport 'reflect-metadata';\n\nimport * as compiler from '@angular/compiler';\nimport * as tsc from '@angular/tsc-wrapped';\nimport * as path from 'path';\nimport * as ts from 'typescript';\n\nimport {CompilerHost, CompilerHostContext, ModuleResolutionHostAdapter} from './compiler_host';\nimport {PathMappedCompilerHost} from './path_mapped_compiler_host';\n\nexport class Extractor {\n constructor(\n private options: tsc.AngularCompilerOptions, private ngExtractor: compiler.Extractor,\n public host: ts.CompilerHost, private ngCompilerHost: CompilerHost,\n private program: ts.Program) {}\n\n extract(formatName: string, outFile: string|null): Promise<string[]> {\n // Checks the format and returns the extension\n const ext = this.getExtension(formatName);\n\n const promiseBundle = this.extractBundle();\n\n return promiseBundle.then(bundle => {\n const content = this.serialize(bundle, formatName);\n const dstFile = outFile || `messages.${ext}`;\n const dstPath = path.join(this.options.genDir !, dstFile);\n this.host.writeFile(dstPath, content, false);\n return [dstPath];\n });\n }\n\n extractBundle(): Promise<compiler.MessageBundle> {\n const files = this.program.getSourceFiles().map(\n sf => this.ngCompilerHost.getCanonicalFileName(sf.fileName));\n\n return this.ngExtractor.extract(files);\n }\n\n serialize(bundle: compiler.MessageBundle, formatName: string): string {\n const format = formatName.toLowerCase();\n let serializer: compiler.Serializer;\n\n switch (format) {\n case 'xmb':\n serializer = new compiler.Xmb();\n break;\n case 'xliff2':\n case 'xlf2':\n serializer = new compiler.Xliff2();\n break;\n case 'xlf':\n case 'xliff':\n default:\n serializer = new compiler.Xliff();\n }\n return bundle.write(\n serializer, (sourcePath: string) => this.options.basePath ?\n path.relative(this.options.basePath, sourcePath) :\n sourcePath);\n }\n\n getExtension(formatName: string): string {\n const format = (formatName || 'xlf').toLowerCase();\n\n switch (format) {\n case 'xmb':\n return 'xmb';\n case 'xlf':\n case 'xlif':\n case 'xliff':\n case 'xlf2':\n case 'xliff2':\n return 'xlf';\n }\n\n throw new Error(`Unsupported format \"${formatName}\"`);\n }\n\n static create(\n options: tsc.AngularCompilerOptions, program: ts.Program, tsCompilerHost: ts.CompilerHost,\n locale?: string|null, compilerHostContext?: CompilerHostContext,\n ngCompilerHost?: CompilerHost): Extractor {\n if (!ngCompilerHost) {\n const usePathMapping = !!options.rootDirs && options.rootDirs.length > 0;\n const context = compilerHostContext || new ModuleResolutionHostAdapter(tsCompilerHost);\n ngCompilerHost = usePathMapping ? new PathMappedCompilerHost(program, options, context) :\n new CompilerHost(program, options, context);\n }\n\n const {extractor: ngExtractor} = compiler.Extractor.create(ngCompilerHost, locale || null);\n\n return new Extractor(options, ngExtractor, tsCompilerHost, ngCompilerHost, program);\n }\n}\n"]}
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