Implement Analyzer class for code analysis

vscode-extension/src/analysis/analyzer.ts

@@ -0,0 +1,96 @@
+import * as vscode from 'vscode';
+import { TypingMonitor } from '../monitors/typingMonitor';
+import { PasteMonitor } from '../monitors/pasteMonitor';
+import { LocalEngine } from './localEngine';
+
+export interface AnalysisResult {
+    confidence: number;  // 0-1
+    components: {
+        typingAnomaly: number;
+        pastePattern: number;
+        codeFingerprint: number;
+        metadataCorrelation: number;
+    };
+    explanation: string;
+    timestamp: number;
+}
+
+export class Analyzer {
+    constructor(
+        private typingMonitor: TypingMonitor,
+        private pasteMonitor: PasteMonitor,
+        private localEngine: LocalEngine
+    ) {}
+    
+    public async analyze(document: vscode.TextDocument): Promise<AnalysisResult> {
+        // Component scores (each 0-1)
+        const typingScore = this.typingMonitor.getAnomalyScore(document);
+        const pasteScore = this.pasteMonitor.getScore(document);
+        
+        // Code fingerprint analysis (calls Python engine)
+        const fingerprintScore = await this.localEngine.analyzeCode(
+            document.getText(),
+            { language: document.languageId }
+        );
+        
+        // Metadata correlation (check git history, etc.)
+        const metadataScore = await this.analyzeMetadata(document);
+        
+        // Weighted combination
+        const weights = {
+            typing: 0.2,
+            paste: 0.3,
+            fingerprint: 0.4,
+            metadata: 0.1
+        };
+        
+        const confidence = 
+            typingScore * weights.typing +
+            pasteScore * weights.paste +
+            fingerprintScore * weights.fingerprint +
+            metadataScore * weights.metadata;
+        
+        return {
+            confidence,
+            components: {
+                typingAnomaly: typingScore,
+                pastePattern: pasteScore,
+                codeFingerprint: fingerprintScore,
+                metadataCorrelation: metadataScore
+            },
+            explanation: this.generateExplanation(confidence, {
+                typingScore,
+                pasteScore,
+                fingerprintScore,
+                metadataScore
+            }),
+            timestamp: Date.now()
+        };
+    }
+    
+    private async analyzeMetadata(document: vscode.TextDocument): Promise<number> {
+        // Check git history patterns, copilot telemetry, etc.
+        // Returns 0-1 score
+        return 0.0; // Placeholder
+    }
+    
+    private generateExplanation(confidence: number, scores: any): string {
+        const reasons: string[] = [];
+        
+        if (scores.typingScore > 0.6) {
+            reasons.push('Unusually high typing velocity detected');
+        }
+        if (scores.pasteScore > 0.6) {
+            reasons.push('Large paste events detected');
+        }
+        if (scores.fingerprintScore > 0.6) {
+            reasons.push('Code structure matches known AI patterns');
+        }
+        
+        if (reasons.length === 0) {
+            return `Low AI likelihood (${(confidence * 100).toFixed(0)}%)`;
+        }
+        
+        return `Potentially AI-influenced (${(confidence * 100).toFixed(0)}%): ${reasons.join(', ')}`;
+    }
+}