279 lines
10 KiB
Python
279 lines
10 KiB
Python
"""
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utils/scheduler.py — Daily completion report email scheduler.
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Runs a background daemon thread that wakes every minute, checks whether
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the configured send_time (HH:MM) has been reached today, and sends the
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summary report via SMTP if it hasn't been sent yet.
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Configuration (config.ini [email] section):
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enabled = true/false
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smtp_host = smtp.example.com
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smtp_port = 587
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smtp_user = sender@example.com
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smtp_password= secret
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use_tls = true
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recipients = admin@example.com, manager@example.com
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send_time = 18:00 (24-hour HH:MM, local time)
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Call start() once after login succeeds (admin only).
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Call stop() on logout/shutdown.
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"""
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import configparser
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import datetime
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import logging
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import os
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import smtplib
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import threading
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from email.mime.multipart import MIMEMultipart
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from email.mime.text import MIMEText
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logger = logging.getLogger("scheduler")
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CONFIG_FILE = "config.ini"
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_scheduler_thread: "threading.Thread | None" = None
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_stop_event = threading.Event()
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# ─── Config helpers ───────────────────────────────────────────────────────────
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def load_email_config() -> dict:
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from utils.config_crypto import decrypt_value
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cfg = configparser.ConfigParser()
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if not os.path.exists(CONFIG_FILE):
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return {}
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cfg.read(CONFIG_FILE, encoding="utf-8")
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if "email" not in cfg:
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return {}
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s = cfg["email"]
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return {
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"enabled": s.getboolean("enabled", fallback=False),
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"smtp_host": s.get("smtp_host", ""),
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"smtp_port": s.getint("smtp_port", fallback=587),
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"smtp_user": s.get("smtp_user", ""),
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"smtp_password": decrypt_value(s.get("smtp_password", "")),
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"use_tls": s.getboolean("use_tls", fallback=True),
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"recipients": [r.strip() for r in s.get("recipients", "").split(",") if r.strip()],
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"send_time": s.get("send_time", "18:00"),
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}
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def save_email_config(enabled: bool, smtp_host: str, smtp_port: int,
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smtp_user: str, smtp_password: str, use_tls: bool,
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recipients: str, send_time: str):
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from utils.config_crypto import encrypt_value
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cfg = configparser.ConfigParser()
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cfg.read(CONFIG_FILE, encoding="utf-8")
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cfg["email"] = {
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"enabled": str(enabled).lower(),
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"smtp_host": smtp_host,
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"smtp_port": str(smtp_port),
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"smtp_user": smtp_user,
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"smtp_password": encrypt_value(smtp_password),
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"use_tls": str(use_tls).lower(),
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"recipients": recipients,
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"send_time": send_time,
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}
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with open(CONFIG_FILE, "w", encoding="utf-8") as fh:
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cfg.write(fh)
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logger.info("Email configuration saved (password encrypted).")
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def test_smtp_connection(smtp_host, smtp_port, smtp_user, smtp_password, use_tls) -> tuple:
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"""
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Attempt a connection without sending mail.
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Returns (success: bool, message: str).
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"""
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try:
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if use_tls:
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server = smtplib.SMTP(smtp_host, smtp_port, timeout=8)
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server.starttls()
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else:
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server = smtplib.SMTP_SSL(smtp_host, smtp_port, timeout=8)
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server.login(smtp_user, smtp_password)
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server.quit()
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return True, "Connection successful."
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except Exception as e:
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return False, str(e)
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# ─── Report builder ───────────────────────────────────────────────────────────
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def _build_html_report() -> str:
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"""Build a simple HTML daily summary table."""
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try:
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from models import get_admin_dashboard_stats
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stats = get_admin_dashboard_stats()
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except Exception as e:
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return f"<p>Error generating report: {e}</p>"
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today = datetime.date.today().strftime("%A, %d %B %Y")
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rows = stats.get("user_stats", [])
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table_rows = ""
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skipped_no_shift = 0
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for r in rows:
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total = int(r.get("total_sites") or 0)
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# Skip users with no shifts scheduled today — they have no expected
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# work for this day and showing them as "0 / 0 — 0%" is misleading.
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if total == 0:
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skipped_no_shift += 1
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continue
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pct = float(r.get("pct_complete") or 0)
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color = "#388e3c" if pct >= 100 else "#f57c00" if pct > 0 else "#d32f2f"
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table_rows += (
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f"<tr>"
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f"<td style='padding:8px 12px'>{r['username']}</td>"
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f"<td style='padding:8px 12px'>{r['full_name'] or ''}</td>"
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f"<td style='padding:8px 12px;text-align:center'>{int(r['checked_count'] or 0)}</td>"
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f"<td style='padding:8px 12px;text-align:center'>{total}</td>"
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f"<td style='padding:8px 12px;text-align:center;"
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f"color:{color};font-weight:bold'>{pct:.0f}%</td>"
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f"</tr>"
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)
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if not table_rows:
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table_rows = (
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"<tr><td colspan='5' style='padding:12px;color:#6b6b80;"
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"text-align:center'>No users with active shifts today.</td></tr>"
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)
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no_shift_note = (
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f"<p style='color:#6b6b80;font-size:11px'>"
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f"{skipped_no_shift} user(s) had no shifts scheduled today and are "
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f"excluded from this report.</p>"
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) if skipped_no_shift else ""
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return f"""
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<html><body style="font-family:Segoe UI,Arial,sans-serif;color:#1a1a2e">
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<h2 style="color:#5b4de8">Website Checker — Daily Report</h2>
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<p style="color:#6b6b80">{today}</p>
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<table border="0" cellspacing="0" cellpadding="0"
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style="border-collapse:collapse;width:100%;max-width:600px">
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<thead>
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<tr style="background:#e0dff8">
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<th style="padding:10px 12px;text-align:left">Username</th>
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<th style="padding:10px 12px;text-align:left">Full Name</th>
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<th style="padding:10px 12px;text-align:center">Checked</th>
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<th style="padding:10px 12px;text-align:center">Total</th>
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<th style="padding:10px 12px;text-align:center">Completion</th>
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</tr>
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</thead>
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<tbody>{table_rows}</tbody>
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</table>
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{no_shift_note}
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<p style="color:#6b6b80;font-size:12px;margin-top:24px">
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Sent automatically by Website Checker at {datetime.datetime.now().strftime('%H:%M')}.
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</p>
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</body></html>
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"""
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def _send_report(cfg: dict):
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"""Build and send the daily report email."""
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html = _build_html_report()
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today = datetime.date.today().strftime("%d %b %Y")
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subject = f"Website Checker — Daily Report {today}"
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msg = MIMEMultipart("alternative")
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msg["Subject"] = subject
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msg["From"] = cfg["smtp_user"]
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msg["To"] = ", ".join(cfg["recipients"])
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msg.attach(MIMEText(html, "html", "utf-8"))
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try:
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if cfg["use_tls"]:
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server = smtplib.SMTP(cfg["smtp_host"], cfg["smtp_port"], timeout=10)
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server.starttls()
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else:
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server = smtplib.SMTP_SSL(cfg["smtp_host"], cfg["smtp_port"], timeout=10)
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server.login(cfg["smtp_user"], cfg["smtp_password"])
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server.sendmail(cfg["smtp_user"], cfg["recipients"], msg.as_string())
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server.quit()
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logger.info(f"Daily report emailed to: {cfg['recipients']}")
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except Exception as e:
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logger.error(f"Failed to send daily report email: {e}")
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def _get_last_sent_date() -> "datetime.date | None":
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"""Read the last-sent date from config.ini [email] last_sent_date key."""
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cfg = configparser.ConfigParser()
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if not os.path.exists(CONFIG_FILE):
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return None
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cfg.read(CONFIG_FILE, encoding="utf-8")
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raw = cfg.get("email", "last_sent_date", fallback="")
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if not raw:
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return None
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try:
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return datetime.date.fromisoformat(raw)
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except ValueError:
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return None
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def _set_last_sent_date(d: "datetime.date"):
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"""Persist the last-sent date to config.ini [email] last_sent_date key."""
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cfg = configparser.ConfigParser()
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if os.path.exists(CONFIG_FILE):
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cfg.read(CONFIG_FILE, encoding="utf-8")
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if "email" not in cfg:
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cfg["email"] = {}
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cfg["email"]["last_sent_date"] = d.isoformat()
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with open(CONFIG_FILE, "w", encoding="utf-8") as fh:
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cfg.write(fh)
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# ─── Scheduler loop ───────────────────────────────────────────────────────────
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def _scheduler_loop():
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# Seed from persisted value so a restart after send_time does not re-send.
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last_sent_date = _get_last_sent_date()
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while not _stop_event.is_set():
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_stop_event.wait(60) # sleep 60 seconds between checks
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if _stop_event.is_set():
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break
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cfg = load_email_config()
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if not cfg.get("enabled") or not cfg.get("smtp_host") or not cfg.get("recipients"):
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continue
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try:
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send_h, send_m = map(int, cfg["send_time"].split(":"))
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except Exception:
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continue
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now = datetime.datetime.now()
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today = now.date()
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if (now.hour > send_h or (now.hour == send_h and now.minute >= send_m)):
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if last_sent_date != today:
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last_sent_date = today
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_set_last_sent_date(today)
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logger.info(f"Scheduler: sending daily report at {now.strftime('%H:%M')}.")
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_send_report(cfg)
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def start():
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"""Start the background scheduler thread. Call once after successful login."""
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global _scheduler_thread, _stop_event
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# Guard against double-start: if a thread is already alive (e.g. admin
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# logs out and back in), stop it cleanly before spawning a new one.
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# Without this guard, _stop_event.clear() would unblock the sleeping
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# thread while a second thread also starts, resulting in two scheduler
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# threads firing simultaneously and potentially sending duplicate emails.
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if _scheduler_thread is not None and _scheduler_thread.is_alive():
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logger.info("Email scheduler already running - stopping before restart.")
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_stop_event.set()
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_scheduler_thread.join(timeout=5)
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# Create a fresh Event so there is no residual set-state from a prior stop()
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_stop_event = threading.Event()
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_scheduler_thread = threading.Thread(target=_scheduler_loop,
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name="EmailScheduler", daemon=True)
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_scheduler_thread.start()
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logger.info("Email scheduler started.")
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def stop():
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"""Signal the scheduler to stop cleanly."""
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global _stop_event
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_stop_event.set()
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logger.info("Email scheduler stopped.")
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