lldp-mapper/app.py

# app.py - Flask backend
import logging
import threading
import os
from flask import Flask, jsonify, send_file, render_template, request
from apscheduler.schedulers.background import BackgroundScheduler

import db
from db import save_node_positions, get_node_positions, clear_node_positions
import scanner
from config import EXPORTS_DIR

logging.basicConfig(level=logging.INFO, format='%(asctime)s %(levelname)s %(message)s')
logger = logging.getLogger(__name__)

app = Flask(__name__, template_folder='templates', static_folder='static')

# --- Scheduler setup ---
apscheduler = BackgroundScheduler()
apscheduler.start()
_scheduler_job_id = "autoscan"


def _reschedule(interval_minutes):
    if apscheduler.get_job(_scheduler_job_id):
        apscheduler.remove_job(_scheduler_job_id)
    apscheduler.add_job(
        lambda: _trigger_scan_background(dept=None),
        'interval',
        minutes=int(interval_minutes),
        id=_scheduler_job_id,
        replace_existing=True
    )
    logger.info(f"Auto-scan scheduled every {interval_minutes} minutes")


def _trigger_scan_background(dept: str = None, workers: int = 5, login_delay: int = 3):
    """Run scan in a background thread. dept=None → all switches."""
    if not scanner.scan_state["running"]:
        t = threading.Thread(target=scanner.run_scan,
                             kwargs={"dept": dept, "workers": workers, "login_delay": login_delay},
                             daemon=True)
        t.start()


# Restore scheduler state on startup
db.init_db()
if db.get_setting("autoscan_enabled") == "true":
    interval = db.get_setting("autoscan_interval") or "60"
    _reschedule(interval)


# --- API Routes ---

@app.route("/")
def index():
    return render_template("index.html")


def _scan_params():
    body = request.get_json(silent=True) or {}
    workers = max(1, min(10, int(body.get("workers", 5))))
    login_delay = max(0, min(30, int(body.get("login_delay", 3))))
    return workers, login_delay


@app.route("/api/scan", methods=["POST"])
def api_scan():
    """Scan all active switches (no dept filter)."""
    if scanner.scan_state["running"]:
        return jsonify({"error": "Scan already running"}), 409
    workers, login_delay = _scan_params()
    _trigger_scan_background(dept=None, workers=workers, login_delay=login_delay)
    return jsonify({"status": "started", "dept": None})


@app.route("/api/scan/clear", methods=["POST"])
def api_scan_clear():
    """Wipe all switch & link data then run a full scan."""
    if scanner.scan_state["running"]:
        return jsonify({"error": "Scan already running"}), 409
    conn = db.get_conn()
    conn.execute("DELETE FROM switches")
    conn.execute("DELETE FROM links")
    conn.commit()
    conn.close()
    workers, login_delay = _scan_params()
    _trigger_scan_background(dept=None, workers=workers, login_delay=login_delay)
    return jsonify({"status": "started", "cleared": True})


@app.route("/api/scan/elec", methods=["POST"])
def api_scan_elec():
    """Scan only ELEC department switches."""
    if scanner.scan_state["running"]:
        return jsonify({"error": "Scan already running"}), 409
    workers, login_delay = _scan_params()
    _trigger_scan_background(dept="ELEC", workers=workers, login_delay=login_delay)
    return jsonify({"status": "started", "dept": "ELEC"})


@app.route("/api/scan/gw", methods=["POST"])
def api_scan_gw():
    """Scan only GW department switches."""
    if scanner.scan_state["running"]:
        return jsonify({"error": "Scan already running"}), 409
    workers, login_delay = _scan_params()
    _trigger_scan_background(dept="GW", workers=workers, login_delay=login_delay)
    return jsonify({"status": "started", "dept": "GW"})


@app.route("/api/status")
def api_status():
    state = dict(scanner.scan_state)
    last = db.get_last_scan()
    state["last_scan_log"] = dict(last) if last else None
    state["autoscan_enabled"] = db.get_setting("autoscan_enabled") == "true"
    state["autoscan_interval"] = int(db.get_setting("autoscan_interval") or 60)
    return jsonify(state)


@app.route("/api/switches")
def api_switches():
    return jsonify(db.get_all_switches())


@app.route("/api/links")
def api_links():
    return jsonify(db.get_all_links())


@app.route("/api/topology")
def api_topology():
    switches = {s["chassis_id"]: s for s in db.get_all_switches()}
    links = db.get_all_links()

    nodes = []
    for chassis_id, sw in switches.items():
        nodes.append({
            "data": {
                "id": chassis_id,
                "label": sw.get("hostname") or chassis_id,
                "hostname": sw.get("hostname", ""),
                "mgmt_ip": sw.get("mgmt_ip", ""),
                "description": sw.get("description", ""),
                "firmware": sw.get("firmware", ""),
                "vendor": sw.get("vendor", ""),
                "chassis_id": chassis_id,
                "last_seen": sw.get("last_seen", ""),
            }
        })

    edges = []
    for link in links:
        edge_id = f"{link['chassis_a']}:{link['port_a']}__{link['chassis_b']}:{link['port_b']}"
        hostname_a = switches.get(link['chassis_a'], {}).get('hostname', link['chassis_a'])
        hostname_b = switches.get(link['chassis_b'], {}).get('hostname', link['chassis_b'])
        edges.append({
            "data": {
                "id": edge_id,
                "source": link["chassis_a"],
                "target": link["chassis_b"],
                "port_a": link["port_a"],
                "port_b": link["port_b"],
                "hostname_a": hostname_a,
                "hostname_b": hostname_b,
            }
        })

    return jsonify({"nodes": nodes, "edges": edges})


@app.route("/api/settings", methods=["POST"])
def api_settings():
    data = request.json
    enabled = data.get("autoscan_enabled", False)
    interval = int(data.get("autoscan_interval", 60))

    db.set_setting("autoscan_enabled", "true" if enabled else "false")
    db.set_setting("autoscan_interval", str(interval))

    if enabled:
        _reschedule(interval)
    else:
        if apscheduler.get_job(_scheduler_job_id):
            apscheduler.remove_job(_scheduler_job_id)
        logger.info("Auto-scan disabled")

    return jsonify({"autoscan_enabled": enabled, "autoscan_interval": interval})


@app.route("/api/layout", methods=["POST"])
def api_save_layout():
    data = request.json
    positions = data.get("positions", [])
    if not positions:
        return jsonify({"error": "No positions provided"}), 400
    # Normalize 'id' -> 'chassis_id' so JS can send either key
    normalized = [{"chassis_id": p.get("chassis_id") or p.get("id"), "x": p["x"], "y": p["y"]} for p in positions]
    save_node_positions(normalized)
    return jsonify({"saved": len(positions)})


@app.route("/api/layout", methods=["DELETE"])
def api_clear_layout():
    clear_node_positions()
    return jsonify({"status": "cleared"})


@app.route("/api/layout", methods=["GET"])
def api_get_layout():
    positions = get_node_positions()
    return jsonify({"has_custom_layout": len(positions) > 0, "count": len(positions)})

@app.route("/api/layout/positions", methods=["GET"])
def api_get_layout_positions():
    """Return saved positions as list of {id, x, y} for Cytoscape."""
    positions = get_node_positions()
    return jsonify([{"id": cid, "x": xy[0], "y": xy[1]} for cid, xy in positions.items()])


@app.route("/api/switches/clear-stale", methods=["POST"])
def api_clear_stale_switches():
    """Remove switches not seen in the last scan."""
    last = db.get_last_scan()
    if not last:
        return jsonify({"error": "No scan has been run yet"}), 400
    since = last["started_at"]
    deleted = db.clear_stale_switches(since)
    return jsonify({"deleted": deleted})

@app.route("/api/export/csv")
def api_export_csv():
    path = os.path.join(EXPORTS_DIR, "topology.csv")
    if not os.path.exists(path):
        return jsonify({"error": "No export found, run a scan first"}), 404
    return send_file(path, as_attachment=True, download_name="topology.csv")


@app.route("/api/export/mermaid")
def api_export_mermaid():
    path = os.path.join(EXPORTS_DIR, "topology.md")
    if not os.path.exists(path):
        return jsonify({"error": "No export found, run a scan first"}), 404
    return send_file(path, as_attachment=True, download_name="topology.md")


@app.route("/api/export/png")
def api_export_png():
    path = os.path.join(EXPORTS_DIR, "topology.png")
    if not os.path.exists(path):
        return jsonify({"error": "No PNG found, run a scan first"}), 404
    return send_file(path, as_attachment=True, download_name="topology.png")


if __name__ == "__main__":
    app.run(host="0.0.0.0", port=5000, debug=False)