# All files / src/node-obfuscators MemberExpressionObfuscator.ts

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100% Branches 10/10
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     import * as escodegen from 'escodegen';
    import * as estraverse from 'estraverse';
    import * as ESTree from 'estree';

    import { NodeType } from '../enums/NodeType';

    import { AbstractNodeObfuscator } from './AbstractNodeObfuscator';
    import { Nodes } from '../Nodes';
    import { StringLiteralReplacer } from './replacers/StringLiteralReplacer';

    export class MemberExpressionObfuscator extends AbstractNodeObfuscator {
        /**
         * @param memberExpressionNode
         */
        public obfuscateNode (memberExpressionNode: ESTree.MemberExpression): void {
            estraverse.replace(memberExpressionNode.property, {
                enter: (node: ESTree.Node, parentNode: ESTree.Node): any => {
                    if (Nodes.isLiteralNode(node)) {
                        this.obfuscateLiteralProperty(node);

                        return;
                    }

                    if (Nodes.isIdentifierNode(node)) {
                        if (memberExpressionNode.computed) {
                            return;
                        }

                        memberExpressionNode.computed = true;
                        this.obfuscateIdentifierProperty(node);
                    }
                }
            });
        }

        /**
         * replaces:
         *     object.identifier = 1;
         *
         * on:
         *     object[_0x23d45[25]] = 1;
         *
         * and skip:
         *     object[identifier] = 1;
         *
         * @param node
         */
        private obfuscateIdentifierProperty (node: ESTree.Identifier): void {
            let nodeValue: string = node.name,
                literalNode: ESTree.Literal = {
                    raw: `'${nodeValue}'`,
                    'x-verbatim-property': {
                        content : new StringLiteralReplacer(this.nodes, this.options).replace(nodeValue),
                        precedence: escodegen.Precedence.Primary
                    },
                    type: NodeType.Literal,
                    value: nodeValue
                };

            delete node.name;

            Object.assign(node, literalNode);
        }

        /**
         * replaces:
         *     object['literal'] = 1;
         *
         * on:
         *     object[_0x23d45[25]] = 1;
         *
         * @param node
         */
        private obfuscateLiteralProperty (node: ESTree.Literal): void {
            if (typeof node.value === 'string' && !node['x-verbatim-property']) {
                node['x-verbatim-property'] = {
                    content : new StringLiteralReplacer(this.nodes, this.options).replace(node.value),
                    precedence: escodegen.Precedence.Primary
                };
            }
        }
    }