Diff Results

function diffResults(
  before: TransformResult[],
  after: TransformResult[]
): DiffResult[]

interface DiffResult {
  clientId: string;
  scoreBefore: number;
  scoreAfter: number;
  scoreDelta: number;       // Positive = improved
  fixed: CSSWarning[];      // Warnings that were resolved
  introduced: CSSWarning[]; // New warnings
  unchanged: CSSWarning[];  // Warnings still present
}

import {
  transformForAllClients,
  analyzeEmail,
  generateCompatibilityScore,
  diffResults,
} from "@emailens/engine";

// Before changes
const beforeTransforms = transformForAllClients(originalHtml);

// After changes
const afterTransforms = transformForAllClients(updatedHtml);

const diffs = diffResults(beforeTransforms, afterTransforms);

for (const diff of diffs) {
  if (diff.scoreDelta > 0) {
    console.log(`${diff.clientId}: improved by ${diff.scoreDelta} points`);
    console.log(`  Fixed: ${diff.fixed.length} issues`);
  } else if (diff.scoreDelta < 0) {
    console.log(`${diff.clientId}: regressed by ${Math.abs(diff.scoreDelta)} points`);
    console.log(`  New issues: ${diff.introduced.length}`);
  }
}