Refactor script to generate MP3 files

In this commit, I made several improvements to the 'generate_mp3.sh' script:

1. Removed old complete files before processing to ensure a clean slate.
2. Modified the 'create_mp3_files' function to use '>>' instead of '>' when appending text to the complete files.
3. Updated the comments in the script for better clarity.

These changes help maintain a more organized and reliable MP3 generation process. The script now properly appends text to the 'de_complete.txt' and 'es_complete.txt' files, and it removes old complete files before starting the processing.

File Changes:
- Modified 'generate_mp3.sh' (see diff for details)

Note: Please review and test the changes to ensure they meet your requirements.

generate_mp3.sh

@@ -20,9 +20,11 @@ category_order=("date" "time")
 txt_dir="/data/scripts/.text"
 mp3_dir="/data/scripts/.mp3"
 
+# remove old files
+rm -f "$txt_dir"/*complete.txt
+
 # Function to create MP3 files
 create_mp3_files() {
-  rm -f "$txt_dir"/*complete.txt
 
   for file in "$txt_dir"/*.txt; do
     text=$(cat "$file") # Read the content of the file
@@ -31,12 +33,12 @@ create_mp3_files() {
     if [[ $file == *de.txt ]]; then
       # If it's a German file, create a German MP3
       /data/data/com.termux/files/usr/bin/gtts-cli -l de "$text" --output "$mp3_dir/$base_filename.mp3"
-      echo "$text" > "$txt_dir/de_complete.txt"
+      echo "$text" >> "$txt_dir/de_complete.txt"
       echo "German MP3 file created: $base_filename.mp3"
     elif [[ $file != *de.txt ]]; then
       # If it's a Spanish file, create a Spanish MP3 in slow mode
       /data/data/com.termux/files/usr/bin/gtts-cli -l es -s "$text" --output "$mp3_dir/$base_filename.mp3"
-      echo "$text" > "$txt_dir/es_complete.txt"
+      echo "$text" >> "$txt_dir/es_complete.txt"
       echo "Spanish MP3 file created: $base_filename.mp3"
     else
       echo "File $file was not processed"