nmcli wifi parser

wifi.py

@@ -0,0 +1,114 @@
+#!/usr/bin/env python
+# allowed fields: NAME,SSID,SSID-HEX,BSSID,MODE,CHAN,FREQ,RATE,BANDWIDTH,SIGNAL,BARS,SECURITY,WPA-FLAGS,RSN-FLAGS,DEVICE,ACTIVE,IN-USE,DBUS-PATH
+# TODO: can't connect to AP with empty ssid
+import subprocess as sp
+import sys
+
+
+CFG = {
+    "nmcli": {
+        #"device": "",
+        "fields": ["ssid", "signal", "security", "chan", "rate", "mode", "bssid"],
+    },
+    "rfkill": {
+        "device": "wlan"
+    }
+}
+
+if not CFG["nmcli"]["fields"][0].lower() == "ssid":
+    raise NotImplementedError("ssid must be the first element in fields, will hopefully be fixed in the future")
+
+
+def _split_blocks(text: str) -> list:
+    lines_list = text.splitlines()
+    field_len = len(CFG["nmcli"]["fields"])
+    if len(lines_list) % field_len:
+        raise ValueError("The amount of field elements doesn't devide evenly by the number of fields")
+
+    return [ lines_list[i:i+field_len] for i in range(0, len(lines_list), field_len) ]
+
+
+def _parse_blocks(block_list: list) -> list:
+    new_block_list = []
+    for block in block_list:
+        block_dict = {}
+        for element in block:
+            elm_split = element.split(":", 1)
+            block_dict[elm_split[0]] = elm_split[1]
+        new_block_list.append(block_dict)
+    return new_block_list
+
+
+def _gather_wifi() -> str:
+    sp.run(["nmcli", "dev", "wifi", "rescan"])
+    wifi_text = sp.run(
+        [
+            "nmcli",
+            "--terse",
+            "--colors", "no",
+            "--escape", "yes",
+            "--mode", "multiline",
+            "--fields", ",".join(CFG["nmcli"]["fields"]),
+            "dev", "wifi"
+        ],
+        capture_output=True,
+        text=True
+    )
+    return wifi_text.stdout
+
+
+def query_ssid(ssid: str) -> list:
+    gathered_connections = []
+    for element in get_wifi():
+        if element["SSID"] == ssid:
+            gathered_connections.append(element)
+
+    return gathered_connections
+
+
+def get_wifi() -> list:
+    return _parse_blocks(_split_blocks(_gather_wifi()))
+
+
+def connect(ssid: str) -> bool:
+    gathered_connections = query_ssid(ssid)
+
+    if len(gathered_connections) == 0:
+        print("Found no matching wifi ssid")
+        return False # think about the return type later
+
+    #connect_cmd = ["nmcli", "connection", "up", "id", ssid, "iface", "wifi"]
+    connection_id = ssid
+    if len(gathered_connections) > 1:
+        print("Found multiple access points with the exact same name (ssid)")
+        print("bssid:")
+        for element in gathered_connections:
+            print(" " * 4 + element["BSSID"], element["SIGNAL"] + "%")
+        answer = input("Do you want to choose a specific BSSID? [y/N]: ").lower()
+        if answer == "y":
+            connection_id = input("Which bssid: ")
+
+    sp.run(["rfkill", "unblock", CFG["rfkill"]["device"]])
+    sp.run(["nmcli", "networking", "on"])
+
+    connect_cmd = ["nmcli", "--ask", "device", "wifi", "connect", connection_id]
+    sp.run(connect_cmd)
+
+    return True
+
+
+def main():
+    try:
+        my_dict = get_wifi()
+        for element in my_dict:
+            print(element)
+        my_input = input("wifi_name: ")
+        connect(my_input)
+    except KeyboardInterrupt:
+        print("")
+        print(">>> Interrupted by user")
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()