Code coverage report for src/Obfuscator.ts

# All files / src Obfuscator.ts

100% Statements 54/54
100% Branches 12/12
100% Functions 6/6
100% Lines 54/54

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     import * as estraverse from 'estraverse';
    import * as ESTree from 'estree';

    import { TNodeGroup } from './types/TNodeGroup';
    import { TNodeObfuscator } from './types/TNodeObfuscator';

    import { ICustomNode } from './interfaces/custom-nodes/ICustomNode';
    import { IObfuscator } from './interfaces/IObfuscator';
    import { IOptions } from './interfaces/IOptions';
    import { IStackTraceData } from './interfaces/stack-trace-analyzer/IStackTraceData';

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

    import { CatchClauseObfuscator } from './node-obfuscators/CatchClauseObfuscator';
    import { ConsoleOutputNodesGroup } from './node-groups/ConsoleOutputNodesGroup';
    import { DebugProtectionNodesGroup } from './node-groups/DebugProtectionNodesGroup';
    import { DomainLockNodesGroup } from './node-groups/DomainLockNodesGroup';
    import { FunctionDeclarationObfuscator } from './node-obfuscators/FunctionDeclarationObfuscator';
    import { FunctionObfuscator } from './node-obfuscators/FunctionObfuscator';
    import { LabeledStatementObfuscator } from './node-obfuscators/LabeledStatementObfuscator';
    import { LiteralObfuscator } from './node-obfuscators/LiteralObfuscator';
    import { MemberExpressionObfuscator } from './node-obfuscators/MemberExpressionObfuscator';
    import { MethodDefinitionObfuscator } from './node-obfuscators/MethodDefinitionObfuscator';
    import { Node } from './node/Node';
    import { NodeUtils } from './node/NodeUtils';
    import { ObjectExpressionObfuscator } from './node-obfuscators/ObjectExpressionObfuscator';
    import { SelfDefendingNodesGroup } from './node-groups/SelfDefendingNodesGroup';
    import { StackTraceAnalyzer } from './stack-trace-analyzer/StackTraceAnalyzer';
    import { StringArrayNodesGroup } from './node-groups/StringArrayNodesGroup';
    import { VariableDeclarationObfuscator } from './node-obfuscators/VariableDeclarationObfuscator';

    export class Obfuscator implements IObfuscator {
        /**
         * @type {TNodeGroup[]}
         */
        private static nodeGroups: TNodeGroup[] = [
            DomainLockNodesGroup,
            SelfDefendingNodesGroup,
            ConsoleOutputNodesGroup,
            DebugProtectionNodesGroup,
            StringArrayNodesGroup
        ];

        /**
         * @type {Map<string, TNodeObfuscator[]>}
         */
        private static nodeObfuscators: Map <string, TNodeObfuscator[]> = new Map <string, TNodeObfuscator[]> ([
            [NodeType.ArrowFunctionExpression, [FunctionObfuscator]],
            [NodeType.ClassDeclaration, [FunctionDeclarationObfuscator]],
            [NodeType.CatchClause, [CatchClauseObfuscator]],
            [NodeType.FunctionDeclaration, [
                FunctionDeclarationObfuscator,
                FunctionObfuscator
            ]],
            [NodeType.FunctionExpression, [FunctionObfuscator]],
            [NodeType.MemberExpression, [MemberExpressionObfuscator]],
            [NodeType.MethodDefinition, [MethodDefinitionObfuscator]],
            [NodeType.ObjectExpression, [ObjectExpressionObfuscator]],
            [NodeType.VariableDeclaration, [VariableDeclarationObfuscator]],
            [NodeType.LabeledStatement, [LabeledStatementObfuscator]],
            [NodeType.Literal, [LiteralObfuscator]]
        ]);

        /**
         * @type {Map<string, AbstractCustomNode>}
         */
        private customNodes: Map <string, ICustomNode> = new Map <string, ICustomNode> ();

        /**
         * @type {IOptions}
         */
        private options: IOptions;

        /**
         * @param options
         */
        constructor (options: IOptions) {
            this.options = options;
        }

        /**
         * @param node
         * @returns {ESTree.Node}
         */
        public obfuscateNode (node: ESTree.Program): ESTree.Node {
            if (Node.isProgramNode(node) && !node.body.length) {
                return node;
            }

            NodeUtils.parentize(node);

            const stackTraceData: IStackTraceData[] = new StackTraceAnalyzer(node.body).analyze();

            this.initializeCustomNodes(stackTraceData);

            this.beforeObfuscation(node);
            this.obfuscate(node);
            this.afterObfuscation(node);

            return node;
        }

        /**
         * @param astTree
         */
        private afterObfuscation (astTree: ESTree.Node): void {
            this.customNodes.forEach((node: ICustomNode) => {
                if (node.getAppendState() === AppendState.AfterObfuscation) {
                    node.appendNode(astTree);
                }
            });
        }

        /**
         * @param astTree
         */
        private beforeObfuscation (astTree: ESTree.Node): void {
            this.customNodes.forEach((node: ICustomNode) => {
                if (node.getAppendState() === AppendState.BeforeObfuscation) {
                    node.appendNode(astTree);
                }
            });
        };

        /**
         * @param stackTraceData
         */
        private initializeCustomNodes (stackTraceData: IStackTraceData[]): void {
            let customNodes: [string, ICustomNode][] = [];

            Obfuscator.nodeGroups.forEach((nodeGroupConstructor: TNodeGroup) => {
                const nodeGroupNodes: Map <string, ICustomNode> | undefined = new nodeGroupConstructor(
                    stackTraceData, this.options
                ).getNodes();

                if (!nodeGroupNodes) {
                    return;
                }

                customNodes.push(...nodeGroupNodes);
            });

            this.customNodes = new Map <string, ICustomNode> (customNodes);
        }

        /**
         * @param node
         * @param parentNode
         */
        private initializeNodeObfuscators (node: ESTree.Node, parentNode: ESTree.Node): void {
            let nodeObfuscators: TNodeObfuscator[] | undefined = Obfuscator.nodeObfuscators.get(node.type);

            if (!nodeObfuscators) {
                return;
            }

            nodeObfuscators.forEach((obfuscator: TNodeObfuscator) => {
                new obfuscator(this.customNodes, this.options).obfuscateNode(node, parentNode);
            });
        }

        /**
         * @param node
         */
        private obfuscate (node: ESTree.Node): void {
            estraverse.traverse(node, {
                enter: (node: ESTree.Node, parentNode: ESTree.Node): void => {
                    this.initializeNodeObfuscators(node, parentNode);
                }
            });
        }
    }