name : add name_postfix.

.README.md

@@ -557,7 +557,8 @@ Command|Description
 `name_series <SEASON> [FILES]`|Rename files to Jellyfin's show format: `Episode S01E01.mkv`.
 `name_manga <SEASON> [FILES]`|Rename files to Kavita's manga format: `Name Vol.1 Ch.01.cbr`.
 `name_ext <EXTENSION> [FILES]`|Change file extensions.
-`name_prefix [OLD] [NEW] [FILES]`|Change file prefix.
+`name_prefix <OLD> <NEW> [FILES]`|Change file prefix.
+`name_postfix <OLD> <NEW> [FILES]`|Change file postfix.
 
 ## Ncdu.
 

.config/bash/module/name.sh

@@ -331,8 +331,8 @@ name_ext()
   fi
 }
 
-# Change file's prefixes.
+# Change file prefixes.
-# Usage: name_prefix [OLD] [NEW] [FILES]
+# Usage: name_prefix <OLD> <NEW> [FILES]
 name_prefix()
 {
   local IFS=$'\n'
@@ -379,5 +379,53 @@ name_prefix()
   fi
 }
 
+# Change file postfix.
+# Usage: name_postfix <OLD> <NEW> [FILES]
+name_postfix()
+{
+  local IFS=$'\n'
+  local old="${1}"         # Old postfix.
+  local new="${2}"         # New postfix.
+  local targets=("${@:3}") # Target files.
+  local count=0            # Total files processed.
+  local total=$((${#}-2))  # Total files to process.
+  local failed=0
+
+  # All targets by default.
+  if [[ "${targets}" = "" ]]; then
+    targets=([^.]*)
+    total=${#targets[@]}
+  fi
+  
+  # Process.
+  for target in "${targets[@]}"; do
+    # Increment counter.
+    ((count++))
+
+    # Create new name.
+    local new_name="${new}${target%$old}"
+
+    # Prepare status.
+    local status="[${count}/${total}] ${target} -> ${new_name}"
+    echo -e "${status}"
+
+    # Warning on no change.
+    [[ "${target}" = "${new_name}" ]] && continue
+    
+    # Rename.
+    mv -- "${target}" "${new_name}"
+    
+    if [[ ${?} != 0 ]]; then
+      echo -e "${color_bred}${status}: Failed.${color_default}"
+      ((failed++))
+    fi
+  done
+
+  if [[ ${failed} != 0 ]]; then
+    echo -e "${color_bred}Failed: ${failed}.${color_default}"
+    false
+  fi
+}
+
 # export for parallel.
 export -f name name_hash name_hash_check name_ext