Move all files from directory tree to single directory if match a pattern

googlefonts.sh

#!/bin/bash
#

# Accepts two arguments
src=$(echo $1)
dest=$(echo $2)

if [ -z $1 ]
then
  if [ -z $(ls | grep googlefontsdirectory) ]
  then
    echo 'Source directory not found.'
    echo 'Please explicitly declare source directory.'
    echo 'Usage googlefonts.sh $src $dest'
    exit 1
  else
    src=$(echo 'googlefontsdirectory')
    if [ -z $(find ./ -type d -name googlefonts -maxdepth 1) ]
    then
      mkdir googlefonts
      dest=$(echo 'googlefonts')
    else
      echo "Destination directory already exists: $(find ./ -type d -name googlefonts -maxdepth 1)"
      echo 'Please explicity declare destination directory.'
      echo 'Usage googlefonts.sh $src $dest'
      exit 1
    fi
  fi
elif [ -z $2 ]
then
  if [ -z $(find ./ -type d -name googlefonts -maxdepth 1) ]
  then
    mkdir googlefonts
    dest=$(echo 'googlefonts')
  else
    echo "Destination directory already exists: $(find ./ -type d -name googlefonts -maxdepth 1)"
    echo 'Please explicity declare destination directory.'
    echo 'Usage googlefonts.sh $src $dest'
    exit 1
  fi

fi

for i in $(find $src -type f -name "*.ttf")
do
  cp -v $i $dest/
done

for i in $(find $src -type f -name "*.otf")
do
  cp -v $i $dest/
done

exit

I wanted to move all of the fonts from their various subdirectories into a single directory so that I could easily copy these into my Font Book. Feel free to revise for your own purposes.