Finish menu exercise

Can you tell I'm enthusiastic about having to use bash for anything
other than shell automation?

class/scripts2/script2.sh

@@ -1,13 +1,26 @@
 #!/bin/bash
 FILE="./BANCO.txt"
+RE='^[0-9]+$'
 
 pause() {
   read -p "Pulse enter para continuar: "
 }
 
 list() {
+  FILE_CONTENTS="$(cat $FILE | sort -t ';' -k3)"
+  if ! checkExists $FILE_CONTENTS; then
+    formatear "Tu cuenta no tiene ningún movimiento!"
+    return
+  fi
+
+  formatear "$FILE_CONTENTS"
+}
+
+formatear() {
+  TEXTO="$1"
+
   echo -e "\n----------------------------------"
-  cat $FILE | sort -t ';' -k3
+  echo "$TEXTO"
   echo -e "----------------------------------\n"
 }
 
@@ -19,48 +32,84 @@ fileCheck() {
 
 addMove() {
   read -p "Nombre: " NOMBRE
-  #read -p "Fecha: " FECHA
   FECHA=$(date -u +%Y-%m-%d_%H-%M-%S)
-  read -p "Importe: " IMPORTE
+  IMPORTE=
+
+  while [[ ! $IMPORTE =~ $RE ]]; do
+    read -p "Importe: " IMPORTE
+  done
+
   read -p "Descripción: " DESCRIPCION
+
   NUM_MOV=$(findFreeID)
   echo "$NUM_MOV;$NOMBRE;$FECHA;$IMPORTE;$DESCRIPCION" >> $FILE
+  formatear "Movimiento exitosamente añadido!"
+}
+
+checkExists() {
+  CHECK_TARGET="$1"
+  TARGET_CONTENTS=$(grep "^$1;*" $FILE)
+
+  if [[ -z $TARGET_CONTENTS ]]; then
+    return 1
+  fi
+}
+
+deleteMove() {
+  DELETE_TARGET="$1"
+
+  if ! checkExists $DELETE_TARGET; then
+    formatear "Este movimiento no existe!"
+    return
+  fi
+
+  formatear "$TARGET_CONTENTS"
+  read -p "Desea borrar este movimiento? [y/N] " ELEC
+  if [[ $ELEC != "y" ]]; then
+    return
+  fi
+
+  sed -i "/^$DELETE_TARGET;/d" $FILE
+  formatear "Movimiento exitosamente borrado!"
 }
 
 findFreeID() {
   COUNT=0
   while true; do
     LINE=$(grep "^$COUNT;*" $FILE)
-    if [ -z $LINE ]; then
+    if [ -z "$LINE" ]; then
       echo $COUNT
       break
-    fi                    
+    fi
     let COUNT++
   done
 }
 
 searchMove() {
-  ID=$1
-  echo -e "\n----------------------------------"
-  grep "^$ID;*" $FILE
-  echo -e "----------------------------------\n"
+  SEARCH_TARGET=$1
+
+  if ! checkExists $SEARCH_TARGET; then
+    formatear "Este movimiento no existe!"
+    return
+  fi
+
+  formatear "$(grep "^$SEARCH_TARGET;*" $FILE)"
 }
 
 search() {
   read -p "ID de movimiento a buscar: " MOV
-  searchMove $MOV
-}
-
-listMoves() {
-  command ...
+  echo $MOV
 }
 
 calcTotal() {
-  command ...
-}
+  TOTAL=0
+  CALC_COL=$(cut -d ";" -f 4 $FILE)
 
-deleteMove() {
-  command ...
+  while read -r v; do
+    TOTAL=$(($TOTAL + $v))
+  done<<<$CALC_COL
+
+  formatear "Tienes un total de $TOTAL€ en movimientos!"
 }
 
 status() {
@@ -87,20 +136,25 @@ main() {
     case "$OPT" in
       "a")
         addMove
+        pause
         ;;
       "b")
-        search
+        MOV=$(search)
+        searchMove "$MOV"
         pause
         ;;
       "l")
         list
         pause
         ;;
-      "a")
-        command ...
+      "t")
+        calcTotal
+        pause
         ;;
-      "a")
-        command ...
+      "d")
+        MOV=$(search)
+        deleteMove "$MOV"
+        pause
         ;;
       "s")
         exit