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@flow\n\nimport type {\n StyleModuleMapType,\n StyleModuleImportMapType,\n HandleMissingStyleNameOptionType\n} from './types';\n\nconst DEFAULT_HANDLE_MISSING_STYLENAME_OPTION = 'throw';\n\nconst isNamespacedStyleName = (styleName: string): boolean => {\n return styleName.indexOf('.') !== -1;\n};\n\nconst getClassNameForNamespacedStyleName = (\n styleName: string,\n styleModuleImportMap: StyleModuleImportMapType,\n handleMissingStyleNameOption?: HandleMissingStyleNameOptionType\n): ?string => {\n // Note:\n // Do not use the desctructing syntax with Babel.\n // Desctructing adds _slicedToArray helper.\n const styleNameParts = styleName.split('.');\n const importName = styleNameParts[0];\n const moduleName = styleNameParts[1];\n const handleMissingStyleName = handleMissingStyleNameOption ||\n DEFAULT_HANDLE_MISSING_STYLENAME_OPTION;\n\n if (!moduleName) {\n if (handleMissingStyleName === 'throw') {\n throw new Error('Invalid style name: ' + styleName);\n } else if (handleMissingStyleName === 'warn') {\n // eslint-disable-next-line no-console\n console.warn('Invalid style name: ' + styleName);\n } else {\n return null;\n }\n }\n\n if (!styleModuleImportMap[importName]) {\n if (handleMissingStyleName === 'throw') {\n throw new Error('CSS module import does not exist: ' + importName);\n } else if (handleMissingStyleName === 'warn') {\n // eslint-disable-next-line no-console\n console.warn('CSS module import does not exist: ' + importName);\n } else {\n return null;\n }\n }\n\n if (!styleModuleImportMap[importName][moduleName]) {\n if (handleMissingStyleName === 'throw') {\n throw new Error('CSS module does not exist: ' + moduleName);\n } else if (handleMissingStyleName === 'warn') {\n // eslint-disable-next-line no-console\n console.warn('CSS module does not exist: ' + moduleName);\n } else {\n return null;\n }\n }\n\n return styleModuleImportMap[importName][moduleName];\n};\n\ntype OptionsType = {|\n handleMissingStyleName: HandleMissingStyleNameOptionType\n|};\n\nexport default (styleNameValue: string, styleModuleImportMap: StyleModuleImportMapType, options?: OptionsType): string => {\n const styleModuleImportMapKeys = Object.keys(styleModuleImportMap);\n\n const handleMissingStyleName = options && options.handleMissingStyleName ||\n DEFAULT_HANDLE_MISSING_STYLENAME_OPTION;\n\n return styleNameValue\n .split(' ')\n .filter((styleName) => {\n return styleName;\n })\n .map((styleName) => {\n if (isNamespacedStyleName(styleName)) {\n return getClassNameForNamespacedStyleName(styleName, styleModuleImportMap, handleMissingStyleName);\n }\n\n if (styleModuleImportMapKeys.length === 0) {\n throw new Error('Cannot use styleName attribute for style name \\'' + styleName +\n '\\' without importing at least one stylesheet.');\n }\n\n if (styleModuleImportMapKeys.length > 1) {\n throw new Error('Cannot use anonymous style name \\'' + styleName +\n '\\' with more than one stylesheet import.');\n }\n\n const styleModuleMap: StyleModuleMapType = styleModuleImportMap[styleModuleImportMapKeys[0]];\n\n if (!styleModuleMap[styleName]) {\n if (handleMissingStyleName === 'throw') {\n throw new Error('Could not resolve the styleName \\'' + styleName + '\\'.');\n }\n if (handleMissingStyleName === 'warn') {\n // eslint-disable-next-line no-console\n console.warn('Could not resolve the styleName \\'' + styleName + '\\'.');\n }\n }\n\n return styleModuleMap[styleName];\n })\n .filter((className) => {\n // Remove any styles which could not be found (if handleMissingStyleName === 'ignore')\n return className;\n })\n .join(' ');\n};\n"]} |