src/auth/mailer.py : envoi d'emails HTML+texte (#73)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/auth/mailer.py

@@ -0,0 +1,72 @@
+import os
+from pathlib import Path
+
+from flask import Flask, render_template
+from flask_mail import Mail, Message
+
+TEMPLATES_DIR = Path(__file__).parent / "templates"
+
+_mail: Mail | None = None
+
+
+def init_mailer(app: Flask) -> None:
+    global _mail
+    app.config["MAIL_SERVER"] = os.getenv("SMTP_HOST", "")
+    app.config["MAIL_PORT"] = int(os.getenv("SMTP_PORT", "587"))
+    app.config["MAIL_USERNAME"] = os.getenv("SMTP_USERNAME") or None
+    app.config["MAIL_PASSWORD"] = os.getenv("SMTP_PASSWORD") or None
+    app.config["MAIL_USE_TLS"] = os.getenv("SMTP_USE_TLS", "True").lower() == "true"
+    app.config["MAIL_DEFAULT_SENDER"] = os.getenv("MAIL_FROM", "noreply@decp.info")
+    app.config["MAIL_SUPPRESS_SEND"] = (
+        os.getenv("DEVELOPMENT", "False").lower() == "true"
+    )
+    # Inclure les templates du package auth dans la recherche Jinja
+    if hasattr(app.jinja_loader, "searchpath"):
+        app.jinja_loader.searchpath.append(str(TEMPLATES_DIR))
+    else:
+        import jinja2
+
+        app.jinja_loader = jinja2.ChoiceLoader(
+            [app.jinja_loader, jinja2.FileSystemLoader(str(TEMPLATES_DIR))]
+        )
+    _mail = Mail(app)
+
+
+def _base_url() -> str:
+    return os.getenv("APP_BASE_URL", "http://localhost:8050").rstrip("/")
+
+
+def _send(
+    subject: str,
+    recipient: str,
+    txt_template: str,
+    html_template: str,
+    **ctx,
+) -> None:
+    assert _mail is not None, "Mailer non initialisé (init_mailer(app) non appelé)"
+    msg = Message(subject=subject, recipients=[recipient])
+    msg.body = render_template(txt_template, **ctx)
+    msg.html = render_template(html_template, **ctx)
+    _mail.send(msg)
+
+
+def send_verification_email(email: str, token: str) -> None:
+    link = f"{_base_url()}/verification-email?token={token}"
+    _send(
+        "Vérification de votre adresse email — decp.info",
+        email,
+        "emails/verify_email.txt",
+        "emails/verify_email.html",
+        link=link,
+    )
+
+
+def send_reset_email(email: str, token: str) -> None:
+    link = f"{_base_url()}/reinitialiser-mot-de-passe?token={token}"
+    _send(
+        "Réinitialisation de votre mot de passe — decp.info",
+        email,
+        "emails/reset_password.txt",
+        "emails/reset_password.html",
+        link=link,
+    )