feat: add lightweight API and web console

app/pigway_pi_control.py

@@ -1,13 +1,14 @@
 #!/usr/bin/env python3
-import time,socket,subprocess,configparser,signal,re,errno,threading,argparse
+import time,socket,subprocess,configparser,signal,re,errno,threading,argparse,json
 from pathlib import Path
-APP_VERSION="3.5.0"
+APP_VERSION="3.6.0"
 from smbus2 import SMBus
 from PIL import Image
 from shutil import disk_usage
 
 OLED=0x3C; MCU=0x0D; W,H=128,32
 CFG="/etc/pigway-pi-control.conf"
+STATUS_PATH="/run/pigway-pi-control/status.json"
 running=True
 
 def stop(*_):
@@ -616,6 +617,17 @@ class DisplayController:
     def owner_snapshot(self):
         with self.lock: return dict(self.requests[self.current_owner_id])
 
+    def status_snapshot(self):
+        with self.lock:
+            alerts=self._ordered_alerts_locked()
+            return {
+                "owner":self.current_owner_id,
+                "oled_page":self.current_oled_page_id,
+                "rgb_mode":self.current_rgb_mode,
+                "alerts":[{k:a[k] for k in ("id","priority","severity","title","l2","l3","l4","first_seen","last_changed")}
+                          for a in alerts],
+            }
+
     def _rgb_worker(self):
         previous_error=None; applied_mode="OFF"; applied_flash=False; animation_started=time.monotonic()
         while not self.stop_event.is_set():
@@ -660,6 +672,29 @@ def cleanup():
     for name,action in (("fan",lambda:mcu(0x08,0x00)),("bus_close",bus.close)):
         try: action()
         except Exception as e: log("ERROR","SHUTDOWN_CLEANUP",step=name,error=repr(e))
+    try: Path(STATUS_PATH).unlink(missing_ok=True)
+    except Exception as e: log("ERROR","SHUTDOWN_CLEANUP",step="status_file",error=repr(e))
+
+def write_status(cpu,temp,mem,disk):
+    display_state=display.status_snapshot()
+    state={
+        "version":APP_VERSION,"timestamp":int(time.time()),"uptime_seconds":uptime_seconds(),
+        "system":{"load_average":load_average(),"cpu_percent":round(cpu,1),
+                  "cpu_freq_mhz":round(cpu_freq_mhz()),"temperature_c":round(temp,1),
+                  "memory_percent":round(mem,1),"disk_percent":round(disk,1),
+                  "root_readonly":bool(fs_readonly),"fan_level":fan_level,"fan_name":FAN_NAME[fan_level]},
+        "power":health,
+        "network":{"interface":net_iface,"kind":net_kind,"metric":net_metric,
+                   "ip_label":ip_label,"ip":ip,"link":bool(link_ok),"internet":bool(net_ok)},
+        "watches":[{"type":w[0],"name":w[1],"target":w[2],"up":bool(ok)}
+                   for w,ok in zip(watches,watch_state)],
+        "display":display_state,
+        "agent":{"loop_errors":agent["loop_errors"],"i2c_errors":agent["i2c_errors"]},
+    }
+    path=Path(STATUS_PATH); path.parent.mkdir(mode=0o755,parents=True,exist_ok=True)
+    temporary=path.with_suffix(".tmp")
+    temporary.write_text(json.dumps(state,ensure_ascii=False,separators=(",",":")))
+    temporary.chmod(0o644); temporary.replace(path)
 
 # Dispatch only after all shared checks and configuration have been initialized.
 parser=argparse.ArgumentParser()
@@ -668,7 +703,7 @@ args=parser.parse_args()
 if args.diagnose: raise SystemExit(diagnose())
 
 watch_state=[]
-last_sensor=last_render=0.0
+last_sensor=last_render=last_status=0.0
 last_net=last_watch=last_health=0.0
 health={}; fs_readonly=False
 agent={"last_sensor_ok":0.0,"last_network_ok":0.0,"last_watch_ok":0.0,"last_health_ok":0.0,"loop_errors":0,"i2c_errors":0}
@@ -731,6 +766,8 @@ try:
             if now-last_render >= OLED_REFRESH:
                 display.refresh()
                 last_render=now
+            if now-last_status >= 1.0:
+                write_status(c,t,m,d); last_status=now
 
             time.sleep(0.20)
         except Exception as e: