moved server to own folder

server/engine.py

@@ -0,0 +1,40 @@
+from datetime import datetime
+
+
+class Log:
+    def __init__(self, settings=None):
+        if settings is None:
+            settings = {"save_error": True, "print_error": True, "save_warning": True, "print_warning": True,
+                        "save_message": False, "print_message": True, "enable_debug": False}
+        self.save_error = settings["save_error"]
+        self.save_warning = settings["save_warning"]
+        self.save_messages = settings["save_message"]
+        self.print_error = settings["print_error"]
+        self.print_warning = settings["print_warning"]
+        self.print_messages = settings["print_message"]
+        self.debug_e = settings["enable_debug"]
+
+    def error(self, error):
+        if self.print_error:
+            print(f"{datetime.now()} -> ERROR: {error}")
+        if self.save_error:
+            with open("log.txt", "a") as file:
+                file.write(f"\n{datetime.now()} -> ERROR: {error}")
+
+    def warning(self, warning):
+        if self.print_warning:
+            print(f"{datetime.now()} -> Warning: {warning}")
+        if self.save_warning:
+            with open("log.txt", "a") as file:
+                file.write(f"\n{datetime.now()} -> Warning: {warning}")
+
+    def message(self, message):
+        if self.print_messages:
+            print(f"{datetime.now()} -> message: {message}")
+        if self.save_messages:
+            with open("log.txt", "a") as file:
+                file.write(f"\n{datetime.now()} -> message: {message}")
+
+    def debug(self, debug):
+        if self.debug_e:
+            print(f"{datetime.now()} -> DEBUG: {debug}")

server/files/test.txt

@@ -0,0 +1 @@
+toto je test číslo 1 zo serveru s ID 2

server/files/test2.txt

@@ -0,0 +1 @@
+toto je test n. 2 zo serveru ID2

server/filesystem.json

@@ -0,0 +1,22 @@
+{
+  "ID": 0,
+    "location": "izba",
+    "descrpition": {
+      "title": "legionrpi",
+      "description_s": "krátky popis, ktorý bude zobrazený iba v náhladovom okne",
+      "description_l": "dlhší popis zariadenia, ktorý bude zobrazený po otvorení",
+      "photo_s": "mala_fotka.png",
+      "photo_b": "velka fotka.png"
+    },
+    "files": [
+      {
+        "name": "test",
+        "format": ".jpg",
+        "description": "toto je jpg test file"
+      }, {
+        "name": "test2",
+        "format": ".txt",
+        "description": "toto je txt test file"
+      }
+    ]
+}

server/log.txt

@@ -0,0 +1,3 @@
+
+2021-03-15 10:13:26.660898 -> Warning: 192.168.1.232 disconnected/is not available
+2021-03-15 11:23:33.589998 -> Warning: 192.168.1.231 disconnected/is not available

server/main.py

@@ -0,0 +1,183 @@
+from fastapi import FastAPI, Request
+from fastapi.responses import FileResponse
+from pydantic import BaseModel
+import engine
+import requests
+import time
+import json
+import os
+import threading
+import hashlib
+
+with open("settings.json", "r") as f:  # loading settings
+    settings = json.load(f)
+
+IP = settings["IP"]
+ID = settings["ID"]
+location = settings["location"]
+
+app = FastAPI()  # init of FastAPI
+log = engine.Log(settings["log"])  # init of LOG
+offline = []
+
+time_to_heartbeat = settings["time_to_heartbeat"]  # Raspberry will be requesting heartbeat every __ seconds
+time_to_heartbeat_offline = settings[
+    "time_to_heartbeat_offline"]  # Raspberry will be requesting heartbeat every __ seconds from offline rpi
+
+# json variables
+filesystem = {  # Here will be files saved on this raspberry
+    "otvaracie_hod": ["t", {"pon": "10-25"}, {"uto": "10-25"}],
+    "prehliadka": ["pdf", "/files/prehliadka.pdf"],
+    "fotky_hrad": ["png_z", ["/files/hrad1.png", "/files/hrad2.png"]]
+}
+heartbeat_table = settings["heartbeat_table"]
+sensors = {  # List of "live" data like tempeature, etc.
+    "teplota": 24,
+    "vlhkosť": 25,
+    "počet ľudí": 10,
+    "doba čakania": 2
+}
+
+heartbeat_table["ID"].append(ID)
+heartbeat_table["IP"].append(IP)
+heartbeat_table["location"].append(location)
+heartbeat_table["file_system"].append(filesystem)
+heartbeat_table["last_heartbeat"].append(time_to_heartbeat)
+
+
+# Todo better "host" ID handeling
+
+class ServerTable(BaseModel):  # table of content for heartbeat request
+    ID: list
+    IP: list
+    location: list
+    file_system: list
+    last_heartbeat: list
+
+
+@app.post("/heartbeat")
+def heartbeat(s_table: ServerTable, request: Request):
+    log.message(f"server requested heartbeat {request.client.host}:{request.client.port}")
+    log.debug(f"Recieved server table: {s_table}")
+
+    try:
+        for position, server_id in enumerate(s_table.ID):
+            if server_id in heartbeat_table["ID"]:
+                if heartbeat_table["last_heartbeat"][heartbeat_table["ID"].index(server_id)] < \
+                        s_table.last_heartbeat[position]:
+                    heartbeat_table["last_heartbeat"][heartbeat_table["ID"].index(server_id)] = s_table.last_heartbeat[
+                        position]
+                    log.debug(f"updated {server_id}`s heartbeat to {s_table.last_heartbeat[position]}")
+                    heartbeat_table["file_system"][heartbeat_table["ID"].index(server_id)] = s_table.file_system[
+                        position]
+            elif server_id == ID:
+                log.debug(f"Updated my heartbeat from {s_table.last_heartbeat[position]} to {time_to_heartbeat}")
+                heartbeat_table["last_heartbeat"][heartbeat_table["ID"].index(ID)] = time_to_heartbeat
+            else:
+                heartbeat_table["ID"].append(s_table.ID[position])
+                heartbeat_table["IP"].append(s_table.IP[position])
+                heartbeat_table["location"].append(s_table.location[position])
+                heartbeat_table["file_system"].append(s_table.file_system[position])
+                heartbeat_table["last_heartbeat"].append(s_table.last_heartbeat[position])
+    except Exception as error:
+        log.error(f"heartbeat > {error}")
+
+    if heartbeat_table["ID"][heartbeat_table["IP"].index(request.client.host)] in offline:
+        offline.remove(heartbeat_table["ID"][heartbeat_table["IP"].index(request.client.host)])
+        log.message(f"{request.client.host} gone online")
+
+    return heartbeat_table, {"ID": ID, "file_system": filesystem, "location": location}
+
+
+@app.get("/sensors")
+def get_sensors(request: Request):
+    log.message(f"sensor data sent to {request.client.host}:{request.client.port}")
+    log.debug(f"sensor data: {sensors}")
+    return sensors
+
+
+@app.get("/files/{IDx}/{file}")
+def get_file(IDx: int, file: str):
+    server_ip = heartbeat_table["IP"][heartbeat_table["ID"].index(IDx)]
+    if IDx == ID:
+        return FileResponse(f"files/{file}")
+    elif IDx in heartbeat_table["ID"]:
+        if os.path.isdir(f"cache/{IDx}"):
+            if os.path.isfile(f"cache/{IDx}/{file}"):
+                with open(f"cache/{IDx}/{file}", "rb") as compared_file:
+                    m = hashlib.md5()
+                    for line in compared_file:
+                        m.update(line)
+                rr = requests.get(f"""http://{server_ip}:8000/compare/{file}""")
+                if rr.text.strip('"') != str(m.hexdigest()):
+                    log.message(f"{file} on server {server_ip} is changed.")
+                else:
+                    log.debug(f"returning cached file cache/{IDx}{file}")
+                    return FileResponse(f"cache/{IDx}/{file}")
+        else:
+            os.mkdir(f"cache/{IDx}")
+        log.message(f"downloading {file} from {server_ip}")
+        r = requests.get(f"http://{server_ip}:8000/files/{IDx}/{file}")
+        with open(f"cache/{IDx}/{file}", "wb") as save:
+            save.write(bytes(r.content))
+        return FileResponse(f"cache/{IDx}/{file}")
+
+
+@app.post("/update")
+def update_sensors():
+    pass
+    # Todo Make option to upload "live data" manually to rpi
+
+
+@app.get("/compare/{file}")
+def comparision(file: str):
+    with open(f"files/{file}", "rb") as compared_file:
+        m = hashlib.md5()
+        for line in compared_file:
+            m.update(line)
+    return m.hexdigest()
+
+
+@app.get("/devices_list")
+def get_devices_list():
+    return heartbeat_table
+
+
+def send_heartbeat(ip, id):
+    global heartbeat_table
+    log.message(f"""sending heartbeat to {ip}({"offline" if id in offline else "online"})""")
+    cache_request = requests.post(f"http://{ip}:8000/heartbeat", data=json.dumps(heartbeat_table))
+    heartbeat_table = dict(cache_request.json()[0])
+    log.debug(json.dumps(cache_request.json(), indent=4))
+
+
+def mainloop():
+    while True:
+        for device_number, device_ID in enumerate(heartbeat_table["ID"]):
+            if device_ID != ID:
+                if heartbeat_table["last_heartbeat"][device_number] < 0:
+                    try:
+                        send_heartbeat(heartbeat_table["IP"][device_number], heartbeat_table["ID"][device_number])
+                    except requests.exceptions.ConnectionError:
+                        if heartbeat_table["ID"][device_number] not in offline:
+                            log.warning(f"""{heartbeat_table["IP"][device_number]} disconnected/is not available""")
+                            offline.append(heartbeat_table["ID"][device_number])
+                        heartbeat_table["last_heartbeat"][int(device_number)] = int(time_to_heartbeat_offline)
+                    else:
+                        if heartbeat_table["ID"][device_number] in offline:
+                            offline.remove(heartbeat_table["ID"][device_number])
+                            log.message(f"""{heartbeat_table["IP"][device_number]} gone online""")
+                        heartbeat_table["last_heartbeat"][int(device_number)] = int(time_to_heartbeat) + 5
+                log.debug(f"""{device_ID} : time to heartbeat : {heartbeat_table["last_heartbeat"][device_number]}""")
+                heartbeat_table["last_heartbeat"][device_number] -= 1
+        time.sleep(1)
+
+
+thread_1 = threading.Thread(target=mainloop, daemon=True)
+thread_1.start()
+
+# Todo in next release: disconnect offline client after set time
+# Todo send to mobile
+# Todo new filesystem handeling
+# Todo implement update system
+# Todo settings for easy adding/editing files/id/text

server/settings.json

@@ -0,0 +1,16 @@
+{
+  "ID": 0,
+  "IP": "192.168.1.99",
+  "location": "izba",
+  "time_to_heartbeat": 20,
+  "time_to_heartbeat_offline": 25,
+  "log": {
+    "save_error": true,
+    "print_error": true,
+    "save_warning": true,
+    "print_warning": true,
+    "save_message": false,
+    "print_message": true,
+    "enable_debug": false
+  }
+}

server/setup.py

@@ -0,0 +1,12 @@
+import tkinter
+import json
+height = 750
+width = 1200
+with open("settings.json", "r") as file:
+    settings = json.load(file)
+with open("settings.json", "r") as file:
+    filesystem = json.load(file)
+canvas = tkinter.Canvas(height=height, width=width)
+canvas.pack()
+
+canvas.mainloop()

server/test.json

@@ -0,0 +1,47 @@
+{
+  "connected_id": 1,
+  "1": {
+    "ID": 1,
+    "location": "GPS",
+    "descrpition": {
+      "title": "nazov rpi ako nazov",
+      "description_s": "krátky popis, ktorý bude zobrazený iba v náhladovom okne",
+      "description_l": "dlhší popis zariadenia, ktorý bude zobrazený po otvorení",
+      "photo_s": "mala_fotka.png",
+      "photo_b": "velka_fotka.png"
+    },
+    "files": [
+      {
+        "name": "prehliadky",
+        "format": ".pdf",
+        "description": "tento súbor obsahuje prehliadky"
+      }, {
+        "name": "prehliadky",
+        "format": ".pdf",
+        "description": "tento súbor obsahuje prehliadky"
+      }
+    ]
+  },
+  "2": {
+    "ID": 2,
+    "location": "GPS",
+    "descrpition": {
+      "title": "nazov rpi ako nazov",
+      "description_s": "krátky popis, ktorý bude zobrazený iba v náhladovom okne",
+      "description_l": "dlhší popis zariadenia, ktorý bude zobrazený po otvorení",
+      "photo_s": "mala_fotka.png",
+      "photo_b": "velka fotka.png"
+    },
+    "files": [
+      {
+        "name": "prehliadky",
+        "format": ".pdf",
+        "description": "tento súbor obsahuje prehliadky"
+      }, {
+        "name": "prehliadky",
+        "format": ".pdf",
+        "description": "tento súbor obsahuje prehliadky"
+      }
+    ]
+  }
+}

server/test.py

@@ -0,0 +1,60 @@
+import curses
+
+menu = ['Home', 'Play', 'Scoreboard', 'Exit']
+
+
+def print_menu(stdscr, selected_row_idx):
+    stdscr.clear()
+    h, w = stdscr.getmaxyx()
+    for idx, row in enumerate(menu):
+        x = w//2 - len(row)//2
+        y = h//2 - len(menu)//2 + idx
+        if idx == selected_row_idx:
+            stdscr.attron(curses.color_pair(1))
+            stdscr.addstr(y, x, row)
+            stdscr.attroff(curses.color_pair(1))
+        else:
+            stdscr.addstr(y, x, row)
+    stdscr.refresh()
+
+
+def print_center(stdscr, text):
+    stdscr.clear()
+    h, w = stdscr.getmaxyx()
+    x = w//2 - len(text)//2
+    y = h//2
+    stdscr.addstr(y, x, text)
+    stdscr.refresh()
+
+
+def main(stdscr):
+    # turn off cursor blinking
+    curses.curs_set(0)
+
+    # color scheme for selected row
+    curses.init_pair(1, curses.COLOR_BLACK, curses.COLOR_WHITE)
+
+    # specify the current selected row
+    current_row = 0
+
+    # print the menu
+    print_menu(stdscr, current_row)
+
+    while 1:
+        key = stdscr.getch()
+
+        if key == curses.KEY_UP and current_row > 0:
+            current_row -= 1
+        elif key == curses.KEY_DOWN and current_row < len(menu)-1:
+            current_row += 1
+        elif key == curses.KEY_ENTER or key in [10, 13]:
+            print_center(stdscr, "You selected '{}'".format(menu[current_row]))
+            stdscr.getch()
+            # if user selected last row, exit the program
+            if current_row == len(menu)-1:
+                break
+
+        print_menu(stdscr, current_row)
+
+
+curses.wrapper(main)

server/version.json

@@ -0,0 +1,4 @@
+{
+  "version": "0.1",
+  "type": "Alpha"
+}