Update update_discord.sh

The logic is like this now:
- try to get a new version
- if it's available - unpack and launch it
- if it's not - launch the old one
- if the old one complains about needing an update - patch the `skipped_versions.txt` with the `needed version + 1` value and relaunch the script

The skipped versions file needed as Discord tends to upload broken versions and later rolling them back and forth several times. So instead we block the next version and only update if Discord complains about it. 

Probably the whole download first logic is not needed at this point, we can just react to stdout. IDC, TBH. Maybe'll fix later.

update_discord.sh

@@ -3,39 +3,100 @@ discord_version=`cat version.txt`
 mapfile -t skipped_versions < skipped_versions.txt
 
 new_discord_version=$((discord_version + 1))
-echo "Trying to get a new version of Discord: v${new_discord_version}"
+echo "[4dis] Trying to get a new version of Discord: v${new_discord_version}"
 
 for skipped_version in "${skipped_versions[@]}"
 do   
    if [ $skipped_version == $new_discord_version ]; then
-      echo "Skipping version ${skipped_version}"
+      echo "[4dis] Skipping version ${skipped_version}"
       new_discord_version=$((new_discord_version + 1))      
    fi;    
 done
 
-echo "Version needed (after skips): v${new_discord_version}"
+echo "[4dis] Version needed (after skips): v${new_discord_version}"
 
 wget "https://stable.dl2.discordapp.net/apps/linux/0.0.$new_discord_version/discord-0.0.$new_discord_version.tar.gz"
 if [ -f "discord-0.0.$new_discord_version.tar.gz" ]; then
-    echo "Removing the old version from update dir"
+    echo "[4dis] Removing the old version from update dir"
     rm -rf "Discord"
-    echo "Removing the old version from the install dir"
-    rm -rf "$HOME/Рабочий стол/Apps/Discord"
-    echo "Unpacking the update"
+    echo "[4dis] Removing the old version from the install dir"
+    rm -rf "$HOME/РабочийCтол/Apps/Discord"
+    echo "[4dis] Unpacking the update"
     tar -xvf "discord-0.0.$new_discord_version.tar.gz"     
-    echo "Copying everything to the install dir"
-    cp -r -T "Discord" "$HOME/Рабочий стол/Apps/Discord"
-    echo "Updating version.txt with the nes version: v${new_discord_version}"
+    echo "[4dis] Copying everything to the install dir"
+    cp -r -T "Discord" "$HOME/РабочийCтол/Apps/Discord"
+    echo "[4dis] Updating version.txt with the nes version: v${new_discord_version}"
     echo $new_discord_version > version.txt    
 else
-    echo "No version upgrade happened"
-    if [ ! -d "$HOME/Рабочий стол/Apps/Discord" ]; then
-      echo "Copying the old version to the install dir (dunno why it was missing)"
-      mkdir -p "$HOME/Рабочий стол/Apps/Discord/"
-      cp -r -T "Discord" "$HOME/Рабочий стол/Apps/Discord/"
+    echo "[4dis] No version upgrade happened"
+    if [ ! -d "$HOME/РабочийCтол/Apps/Discord" ]; then
+      echo "[4dis] Copying the old version to the install dir (dunno why it was missing)"
+      mkdir -p "$HOME/РабочийCтол/Apps/Discord/"
+      cp -r -T "Discord" "$HOME/РабочийCтол/Apps/Discord/"
     fi
 fi
 
 
-"$HOME/РабочийCтол/Apps/Discord/Discord"
+TEMP_FILE=$(mktemp)
+echo "[4dis] Created a temp file to monitor the output: ${TEMP_FILE}"
+
+
+echo "[4dis] Launching Discord..."
+"$HOME/РабочийCтол/Apps/Discord/Discord" > "$TEMP_FILE" 2>&1 &
+
+# Get the process ID of the app
+APP_PID=$!
+
+echo "[4dis] App ID is ${APP_PID}"
+
+# Function to check if the string "update-manually" is in the output
+check_output() {
+    # Use tail to follow the output of the temporary file and grep to filter the specific string
+    tail -f "$TEMP_FILE" | grep "update-manually" | while read -r line; do
+        # Extract the version number using awk and sed
+        version_number=$(echo "$line" | awk '{print $NF}')
+        echo "[4dis] Version number extracted: $version_number"
+        # Store the version number in a variable
+        VERSION_NUMBER=$version_number
+        new_discord_version2=$((VERSION_NUMBER + 1))
+        echo $VERSION_NUMBER > "skipped_versions.txt"
+        # Kill the app
+        kill $APP_PID
+        bash -c '/home/chaiman/dev/discord_updater/update_discord.sh'
+        break
+    done
+}
+
+check_output2() {
+    # Use tail to follow the output of the temporary file and grep to filter the specific string
+    tail -f "$TEMP_FILE" | while read -r line; do
+        if [[ "$line" == *"update-manually"* ]]; then
+            # Extract the version number using awk
+            version_number=$(echo "$line" | awk '{print $NF}' | cut -d '.' -f 3)
+            echo "[4dis] Discord signals about an update being available. Version number extracted: $version_number"
+            # Store the version number in a variable
+            VERSION_NUMBER=$version_number
+            new_discord_version2=$((VERSION_NUMBER + 1))
+            echo "[4dis] Patching the skipped versions list with: ${new_discord_version2}"
+            echo $new_discord_version2 > "skipped_versions.txt"
+            # Kill the app
+            echo "[4dis] Killing the app"
+            kill $APP_PID
+            echo "[4dis] Removing the temp file"
+            rm "$TEMP_FILE"
+            echo "[4dis] Relaunching Discord updater script. It should update now on its own"
+            bash -c '/home/chaiman/dev/discord_updater/update_discord.sh'
+            break
+        fi
+    done
+}
+
+# Loop to continuously check the output
+while true; do
+    if check_output2; then
+        echo "[4dis] String 'update-manually' found. Killing the app."
+        break
+    fi
+    sleep 1  # Sleep for a short period to avoid high CPU usage
+done