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@flow\n\nimport type {\n StyleModuleMapType,\n StyleModuleImportMapType,\n HandleMissingStyleNameOptionType,\n GetClassNameOptionsType\n} from './types';\nimport optionsDefaults from './schemas/optionsDefaults';\n\nconst isNamespacedStyleName = (styleName: string): boolean => {\n return styleName.indexOf('.') !== -1;\n};\n\nconst handleError = (message: string, handleMissingStyleName: HandleMissingStyleNameOptionType): null => {\n if (handleMissingStyleName === 'throw') {\n throw new Error(message);\n } else if (handleMissingStyleName === 'warn') {\n // eslint-disable-next-line no-console\n console.warn(message);\n }\n\n return null;\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 optionsDefaults.handleMissingStyleName;\n\n if (!moduleName) {\n return handleError('Invalid style name: ' + styleName, handleMissingStyleName);\n }\n\n if (!styleModuleImportMap[importName]) {\n return handleError('CSS module import does not exist: ' + importName, handleMissingStyleName);\n }\n\n if (!styleModuleImportMap[importName][moduleName]) {\n return handleError('CSS module does not exist: ' + moduleName, handleMissingStyleName);\n }\n\n return styleModuleImportMap[importName][moduleName];\n};\n\nconst getClassNameFromMultipleImports = (\n styleName: string,\n styleModuleImportMap: StyleModuleImportMapType,\n handleMissingStyleNameOption?: HandleMissingStyleNameOptionType\n): ?string => {\n const handleMissingStyleName = handleMissingStyleNameOption ||\n optionsDefaults.handleMissingStyleName;\n\n const importKeysWithMatches = Object.keys(styleModuleImportMap)\n .map((importKey) => {\n return styleModuleImportMap[importKey][styleName] && importKey;\n })\n .filter((importKey) => {\n return importKey;\n });\n\n if (importKeysWithMatches.length > 1) {\n throw new Error('Cannot resolve styleName \"' + styleName + '\" because it is present in multiple imports:' +\n '\\n\\n\\t' + importKeysWithMatches.join('\\n\\t') +\n '\\n\\nYou can resolve this by using a named import, e.g:' +\n '\\n\\n\\timport foo from \"' + importKeysWithMatches[0] + '\";' +\n '\\n\\t<div styleName=\"foo.' + styleName + '\" />' +\n '\\n\\n');\n }\n\n if (importKeysWithMatches.length === 0) {\n return handleError('Could not resolve the styleName \\'' + styleName + '\\'.', handleMissingStyleName);\n }\n\n return styleModuleImportMap[importKeysWithMatches[0]][styleName];\n};\n\nexport default (styleNameValue: string, styleModuleImportMap: StyleModuleImportMapType, options?: GetClassNameOptionsType): string => {\n const styleModuleImportMapKeys = Object.keys(styleModuleImportMap);\n\n const {\n handleMissingStyleName = optionsDefaults.handleMissingStyleName,\n autoResolveMultipleImports = optionsDefaults.autoResolveMultipleImports\n } = options || {};\n\n if (!styleNameValue) {\n return '';\n }\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 if (!autoResolveMultipleImports) {\n throw new Error('Cannot use anonymous style name \\'' + styleName +\n '\\' with more than one stylesheet import without setting \\'autoResolveMultipleImports\\' to true.');\n }\n\n return getClassNameFromMultipleImports(styleName, styleModuleImportMap, handleMissingStyleName);\n }\n\n const styleModuleMap: StyleModuleMapType = styleModuleImportMap[styleModuleImportMapKeys[0]];\n\n if (!styleModuleMap[styleName]) {\n return handleError('Could not resolve the styleName \\'' + styleName + '\\'.', handleMissingStyleName);\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"],"file":"getClassName.js"} |