enhance networking module

modules/ip

@@ -1,23 +1,56 @@
 #!/bin/bash
 
-#TODO check if at least one device is UP when running "ip addr" in the <> brackets
+# kurzinformation:
+# ist ein Netzwerkadapter vorhanden?
+    # JA
+    # ist eine netzwerkverbindung vorhanden?
+        # JA
+        # ist eine Internetverbindung vorhanden?
+            # JA
+            # *up/down* *interface: Internet IP-ADRESSE, up/down* green
+            # NEIN
+            # *up/down* *interface: Intranet IP-ADRESSE, up/down* orange
+        # NEIN
+        # *off* *interface: off*
+    # NEIN
+    # *n/a* *network interface not available*
+
+# start firefox
+[[ "$BLOCK_BUTTON" == 3 ]] && firefox
+
+# get LONG status
+[[ "$BLOCK_BUTTON" == 1 || "$BLOCK_BUTTON" =~ "long" ]] && LONG=true || LONG=false
+
+# get interface
 if [[ -n "$BLOCK_INSTANCE" ]]; then
-  IF="$BLOCK_INSTANCE"
+    IF="${BLOCK_INSTANCE#long}"
 else
-  IF=$(ip route | awk '/^default/ { print $5 ; exit }')
+    IF=$(ip route | awk '/^default/ { print $5 ; exit }')
 fi
 
+# check if network interface is available
 if [[ "$IF" == "" || ! -d "/sys/class/net/$IF" ]]; then
-   echo "off"
-   echo "X"
-   echo ""
-   exit 33
+    [[ "$LONG" ]] && echo "No network interface found\nn/a\n\n" || echo "n/a\nn/a\n\n"
+    exit 33
 fi
 
-WAN_IP=$(curl -s checkip.dyndns.org | sed -e 's/.*Current IP Address: //' -e 's/<.*$//')
-LAN_IP=$(ip addr show "$IF")
+# get interface information
+LAN=$(ip addr | grep -E "$IF")
 
-#TODO show connection
-echo "$IP"
-echo "$IP"
-echo ""
+# check if interface is up
+if [[ "$LAN" =~ " UP " ]]; then
+
+    # check if interface is connected
+    if [[ "$LAN" =~ \<.*UP.*\> ]]; then
+
+        WAN_IP=$(curl -s checkip.dyndns.org | sed -e 's/.*Current IP Address: //' -e 's/<.*$//')
+        # check if internet connection is established
+        if [[ "$?" -eq 0 && $WAN_IP != "" ]]; then
+            [[ $LONG ]] && echo $WAN_IP || echo up
+        else
+            echo "lan"
+        fi
+    fi
+else
+    [[ "$LONG" ]] && echo "$IF: off\noff\n\n" || echo "off\noff\n\n"
+fi