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Current File : /home/aeaw/www/node_modules/@babel/helper-module-transforms/lib/normalize-and-load-metadata.js
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.hasExports = hasExports;
exports.isSideEffectImport = isSideEffectImport;
exports.default = normalizeModuleAndLoadMetadata;

var _path = require("path");

var _helperValidatorIdentifier = require("@babel/helper-validator-identifier");

var _helperSplitExportDeclaration = _interopRequireDefault(require("@babel/helper-split-export-declaration"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function hasExports(metadata) {
  return metadata.hasExports;
}

function isSideEffectImport(source) {
  return source.imports.size === 0 && source.importsNamespace.size === 0 && source.reexports.size === 0 && source.reexportNamespace.size === 0 && !source.reexportAll;
}

function normalizeModuleAndLoadMetadata(programPath, exportName, {
  noInterop = false,
  loose = false,
  lazy = false,
  esNamespaceOnly = false
} = {}) {
  if (!exportName) {
    exportName = programPath.scope.generateUidIdentifier("exports").name;
  }

  const stringSpecifiers = new Set();
  nameAnonymousExports(programPath);
  const {
    local,
    source,
    hasExports
  } = getModuleMetadata(programPath, {
    loose,
    lazy
  }, stringSpecifiers);
  removeModuleDeclarations(programPath);

  for (const [, metadata] of source) {
    if (metadata.importsNamespace.size > 0) {
      metadata.name = metadata.importsNamespace.values().next().value;
    }

    if (noInterop) metadata.interop = "none";else if (esNamespaceOnly) {
      if (metadata.interop === "namespace") {
        metadata.interop = "default";
      }
    }
  }

  return {
    exportName,
    exportNameListName: null,
    hasExports,
    local,
    source,
    stringSpecifiers
  };
}

function getExportSpecifierName(path, stringSpecifiers) {
  if (path.isIdentifier()) {
    return path.node.name;
  } else if (path.isStringLiteral()) {
    const stringValue = path.node.value;

    if (!(0, _helperValidatorIdentifier.isIdentifierName)(stringValue)) {
      stringSpecifiers.add(stringValue);
    }

    return stringValue;
  } else {
    throw new Error(`Expected export specifier to be either Identifier or StringLiteral, got ${path.node.type}`);
  }
}

function getModuleMetadata(programPath, {
  loose,
  lazy
}, stringSpecifiers) {
  const localData = getLocalExportMetadata(programPath, loose, stringSpecifiers);
  const sourceData = new Map();

  const getData = sourceNode => {
    const source = sourceNode.value;
    let data = sourceData.get(source);

    if (!data) {
      data = {
        name: programPath.scope.generateUidIdentifier((0, _path.basename)(source, (0, _path.extname)(source))).name,
        interop: "none",
        loc: null,
        imports: new Map(),
        importsNamespace: new Set(),
        reexports: new Map(),
        reexportNamespace: new Set(),
        reexportAll: null,
        lazy: false
      };
      sourceData.set(source, data);
    }

    return data;
  };

  let hasExports = false;
  programPath.get("body").forEach(child => {
    if (child.isImportDeclaration()) {
      const data = getData(child.node.source);
      if (!data.loc) data.loc = child.node.loc;
      child.get("specifiers").forEach(spec => {
        if (spec.isImportDefaultSpecifier()) {
          const localName = spec.get("local").node.name;
          data.imports.set(localName, "default");
          const reexport = localData.get(localName);

          if (reexport) {
            localData.delete(localName);
            reexport.names.forEach(name => {
              data.reexports.set(name, "default");
            });
          }
        } else if (spec.isImportNamespaceSpecifier()) {
          const localName = spec.get("local").node.name;
          data.importsNamespace.add(localName);
          const reexport = localData.get(localName);

          if (reexport) {
            localData.delete(localName);
            reexport.names.forEach(name => {
              data.reexportNamespace.add(name);
            });
          }
        } else if (spec.isImportSpecifier()) {
          const importName = getExportSpecifierName(spec.get("imported"), stringSpecifiers);
          const localName = spec.get("local").node.name;
          data.imports.set(localName, importName);
          const reexport = localData.get(localName);

          if (reexport) {
            localData.delete(localName);
            reexport.names.forEach(name => {
              data.reexports.set(name, importName);
            });
          }
        }
      });
    } else if (child.isExportAllDeclaration()) {
      hasExports = true;
      const data = getData(child.node.source);
      if (!data.loc) data.loc = child.node.loc;
      data.reexportAll = {
        loc: child.node.loc
      };
    } else if (child.isExportNamedDeclaration() && child.node.source) {
      hasExports = true;
      const data = getData(child.node.source);
      if (!data.loc) data.loc = child.node.loc;
      child.get("specifiers").forEach(spec => {
        if (!spec.isExportSpecifier()) {
          throw spec.buildCodeFrameError("Unexpected export specifier type");
        }

        const importName = getExportSpecifierName(spec.get("local"), stringSpecifiers);
        const exportName = getExportSpecifierName(spec.get("exported"), stringSpecifiers);
        data.reexports.set(exportName, importName);

        if (exportName === "__esModule") {
          throw exportName.buildCodeFrameError('Illegal export "__esModule".');
        }
      });
    } else if (child.isExportNamedDeclaration() || child.isExportDefaultDeclaration()) {
      hasExports = true;
    }
  });

  for (const metadata of sourceData.values()) {
    let needsDefault = false;
    let needsNamed = false;

    if (metadata.importsNamespace.size > 0) {
      needsDefault = true;
      needsNamed = true;
    }

    if (metadata.reexportAll) {
      needsNamed = true;
    }

    for (const importName of metadata.imports.values()) {
      if (importName === "default") needsDefault = true;else needsNamed = true;
    }

    for (const importName of metadata.reexports.values()) {
      if (importName === "default") needsDefault = true;else needsNamed = true;
    }

    if (needsDefault && needsNamed) {
      metadata.interop = "namespace";
    } else if (needsDefault) {
      metadata.interop = "default";
    }
  }

  for (const [source, metadata] of sourceData) {
    if (lazy !== false && !(isSideEffectImport(metadata) || metadata.reexportAll)) {
      if (lazy === true) {
        metadata.lazy = !/\./.test(source);
      } else if (Array.isArray(lazy)) {
        metadata.lazy = lazy.indexOf(source) !== -1;
      } else if (typeof lazy === "function") {
        metadata.lazy = lazy(source);
      } else {
        throw new Error(`.lazy must be a boolean, string array, or function`);
      }
    }
  }

  return {
    hasExports,
    local: localData,
    source: sourceData
  };
}

function getLocalExportMetadata(programPath, loose, stringSpecifiers) {
  const bindingKindLookup = new Map();
  programPath.get("body").forEach(child => {
    let kind;

    if (child.isImportDeclaration()) {
      kind = "import";
    } else {
      if (child.isExportDefaultDeclaration()) child = child.get("declaration");

      if (child.isExportNamedDeclaration()) {
        if (child.node.declaration) {
          child = child.get("declaration");
        } else if (loose && child.node.source && child.get("source").isStringLiteral()) {
          child.node.specifiers.forEach(specifier => {
            bindingKindLookup.set(specifier.local.name, "block");
          });
          return;
        }
      }

      if (child.isFunctionDeclaration()) {
        kind = "hoisted";
      } else if (child.isClassDeclaration()) {
        kind = "block";
      } else if (child.isVariableDeclaration({
        kind: "var"
      })) {
        kind = "var";
      } else if (child.isVariableDeclaration()) {
        kind = "block";
      } else {
        return;
      }
    }

    Object.keys(child.getOuterBindingIdentifiers()).forEach(name => {
      bindingKindLookup.set(name, kind);
    });
  });
  const localMetadata = new Map();

  const getLocalMetadata = idPath => {
    const localName = idPath.node.name;
    let metadata = localMetadata.get(localName);

    if (!metadata) {
      const kind = bindingKindLookup.get(localName);

      if (kind === undefined) {
        throw idPath.buildCodeFrameError(`Exporting local "${localName}", which is not declared.`);
      }

      metadata = {
        names: [],
        kind
      };
      localMetadata.set(localName, metadata);
    }

    return metadata;
  };

  programPath.get("body").forEach(child => {
    if (child.isExportNamedDeclaration() && (loose || !child.node.source)) {
      if (child.node.declaration) {
        const declaration = child.get("declaration");
        const ids = declaration.getOuterBindingIdentifierPaths();
        Object.keys(ids).forEach(name => {
          if (name === "__esModule") {
            throw declaration.buildCodeFrameError('Illegal export "__esModule".');
          }

          getLocalMetadata(ids[name]).names.push(name);
        });
      } else {
        child.get("specifiers").forEach(spec => {
          const local = spec.get("local");
          const exported = spec.get("exported");
          const localMetadata = getLocalMetadata(local);
          const exportName = getExportSpecifierName(exported, stringSpecifiers);

          if (exportName === "__esModule") {
            throw exported.buildCodeFrameError('Illegal export "__esModule".');
          }

          localMetadata.names.push(exportName);
        });
      }
    } else if (child.isExportDefaultDeclaration()) {
      const declaration = child.get("declaration");

      if (declaration.isFunctionDeclaration() || declaration.isClassDeclaration()) {
        getLocalMetadata(declaration.get("id")).names.push("default");
      } else {
        throw declaration.buildCodeFrameError("Unexpected default expression export.");
      }
    }
  });
  return localMetadata;
}

function nameAnonymousExports(programPath) {
  programPath.get("body").forEach(child => {
    if (!child.isExportDefaultDeclaration()) return;
    (0, _helperSplitExportDeclaration.default)(child);
  });
}

function removeModuleDeclarations(programPath) {
  programPath.get("body").forEach(child => {
    if (child.isImportDeclaration()) {
      child.remove();
    } else if (child.isExportNamedDeclaration()) {
      if (child.node.declaration) {
        child.node.declaration._blockHoist = child.node._blockHoist;
        child.replaceWith(child.node.declaration);
      } else {
        child.remove();
      }
    } else if (child.isExportDefaultDeclaration()) {
      const declaration = child.get("declaration");

      if (declaration.isFunctionDeclaration() || declaration.isClassDeclaration()) {
        declaration._blockHoist = child.node._blockHoist;
        child.replaceWith(declaration);
      } else {
        throw declaration.buildCodeFrameError("Unexpected default expression export.");
      }
    } else if (child.isExportAllDeclaration()) {
      child.remove();
    }
  });
}

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