#minor (2630) [TECH] MJML Previewer

.gitignore

@@ -10,3 +10,5 @@ node_modules
 .idea
 .vscode
 .iterm-workspace
+
+*.preview.html

packages/api/package.json

@@ -42,6 +42,7 @@
     "jsdom": "^22.0.0",
     "json2csv": "^5.0.6",
     "jsonwebtoken": "^9.0.0",
+    "liquidjs": "^10.24.0",
     "lodash": "^4.17.23",
     "mime-types": "^2.1.35",
     "mixin-deep": "^2.0.1",
@@ -143,6 +144,7 @@
     "test:integration:all": "yarn mocha -r ts-node/register --require ./test/globalFixtures.ts --require ./test/bootstrap.int.ts './server/**/*.int.spec.ts' --bail --exit",
     "lint": "eslint --max-warnings=0 --ext .ts",
     "lint:all": "eslint --no-error-on-unmatched-pattern --max-warnings=0 --ext .ts server",
-    "emails:build": "ts-node server/mails/build.ts"
+    "emails:build": "ts-node server/mails/build.ts",
+    "emails:preview": "ts-node server/mails/preview.ts"
   }
-}
+}

packages/api/server/mails/preview.ts

@@ -0,0 +1,89 @@
+import fs from 'node:fs';
+import path from 'node:path';
+import mjml2html from 'mjml';
+import { Liquid } from 'liquidjs';
+
+const args = process.argv.slice(2);
+
+const getArg = (names: string[]): string | undefined => {
+    const index = args.findIndex(arg => names.includes(arg));
+    if (index === -1) {
+        return undefined;
+    }
+
+    return args[index + 1];
+};
+
+const templateName = getArg(['--template', '-t']);
+const variablesPath = getArg(['--variables', '-v']);
+const outputPathArg = getArg(['--output', '-o']);
+const strictMode = args.includes('--strict');
+
+if (!templateName || !variablesPath) {
+    // eslint-disable-next-line no-console
+    console.error('Usage: yarn emails:preview --template <name> --variables <path/to/variables.json> [--output <path/to/output.html>]');
+    process.exit(1);
+}
+
+const normalizeMailjetSyntax = (template: string): string => template
+    .replaceAll(/\bvar:([A-Za-z0-9_.]+)/g, 'var.$1')
+    .replaceAll(/{%\s*elseif\b/g, '{% elsif');
+
+const run = async (): Promise<void> => {
+    const templatePath = path.resolve(__dirname, 'src', `${templateName}.mjml`);
+
+    if (!fs.existsSync(templatePath)) {
+        throw new Error(`Template introuvable: ${templatePath}`);
+    }
+
+    const absoluteVariablesPath = path.resolve(process.cwd(), variablesPath);
+    if (!fs.existsSync(absoluteVariablesPath)) {
+        throw new Error(`Fichier de variables introuvable: ${absoluteVariablesPath}`);
+    }
+
+    const variables = JSON.parse(fs.readFileSync(absoluteVariablesPath, 'utf-8'));
+    const mjmlContent = fs.readFileSync(templatePath, 'utf-8');
+    const compiled = mjml2html(mjmlContent, { filePath: templatePath });
+
+    if (compiled.errors.length > 0) {
+        compiled.errors.forEach((error) => {
+            // eslint-disable-next-line no-console
+            console.warn(`[MJML] ${error.formattedMessage}`);
+        });
+        if (strictMode) {
+            process.exit(1);
+        }
+    }
+
+    const engine = new Liquid({
+        cache: false,
+        strictVariables: false,
+    });
+    try {
+        const html = await engine.parseAndRender(normalizeMailjetSyntax(compiled.html), {
+            var: variables,
+            ...variables,
+        });
+
+        const outputDir = path.resolve(__dirname, 'preview');
+        fs.mkdirSync(outputDir, { recursive: true });
+
+        const outputPath = outputPathArg
+            ? path.resolve(process.cwd(), outputPathArg)
+            : path.join(outputDir, `${templateName}.preview.html`);
+
+        fs.writeFileSync(outputPath, html, 'utf-8');
+        /* eslint-disable no-console */
+        console.log(`\n✅ Preview générée avec succès: ${outputPath}`);
+        console.log(`Fichier: ${outputPath}`);
+        /* eslint-disable no-console */
+    } catch (err) {
+        /* eslint-disable no-console */
+        console.error('❌ Erreur lors du rendu Liquid :');
+        console.error(err);
+        /* eslint-disable no-console */
+        process.exit(1);
+    }
+};
+
+run();

packages/api/server/mails/preview/activity_summary.variables.example.json

@@ -0,0 +1,35 @@
+{
+    "from": "01",
+    "to": "07 janvier 2026",
+    "recipientName": "Utilisateur Test",
+    "showDetails": false,
+    "show_question_summary": false,
+    "questions_with_answers_length": 0,
+    "questions_with_answers": [],
+    "questions_without_answers_length": 0,
+    "questions_without_answers": [],
+    "wwwUrl": "https://www.resorption-bidonvilles.gouv.fr",
+    "webappUrl": "https://app.resorption-bidonvilles.gouv.fr",
+    "backUrl": "https://api.resorption-bidonvilles.gouv.fr",
+    "utm": "utm_source=test&utm_medium=email&utm_campaign=preview",
+    "summaries": [
+        {
+            "code": "75",
+            "name": "Paris",
+            "has_activity": false,
+            "new_shantytowns": [],
+            "new_shantytowns_length": 0,
+            "closed_shantytowns": [],
+            "closed_shantytowns_length": 0,
+            "updated_shantytowns": [],
+            "updated_shantytowns_length": 0,
+            "new_comments": [],
+            "new_comments_length": 0,
+            "new_users": [],
+            "new_users_length": 0,
+            "shantytowns_total": 10,
+            "population_total": 120,
+            "updated_shantytowns_6_months": 9
+        }
+    ]
+}

yarn.lock

@@ -5940,6 +5940,7 @@ __metadata:
     json2csv: ^5.0.6
     jsonwebtoken: ^9.0.0
     lint-staged: ^13.2.2
+    liquidjs: ^10.24.0
     lodash: ^4.17.23
     mime-types: ^2.1.35
     mixin-deep: ^2.0.1
@@ -21512,6 +21513,18 @@ __metadata:
   languageName: node
   linkType: hard
 
+"liquidjs@npm:^10.24.0":
+  version: 10.24.0
+  resolution: "liquidjs@npm:10.24.0"
+  dependencies:
+    commander: ^10.0.0
+  bin:
+    liquid: bin/liquid.js
+    liquidjs: bin/liquid.js
+  checksum: a25638d1a52e34d64ad0ff8deb04d42dd2276913b277742b389b9f5e1a8ec8fc3b923228eb701d28f48b36e199c15466eb5bfee4d38464806a05050ff2c507ce
+  languageName: node
+  linkType: hard
+
 "listenercount@npm:~1.0.1":
   version: 1.0.1
   resolution: "listenercount@npm:1.0.1"