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#!/bin/bash
#
# Common functions.
#

# Setup main configuration and load preferences
function keyringer_config_load {
  if [ -f "$HOME/.$NAME" ]; then
    echo "Converting legacy configuration scheme..."
    mv $HOME/.$NAME $HOME/.$NAME.tmp
    mkdir $HOME/.$NAME
    mv $HOME/.$NAME.tmp $CONFIG
  fi

  if [ ! -e "$CONFIG" ]; then
    echo "Creating $CONFIG..."
    mkdir `dirname $CONFIG`
    touch $CONFIG
    chmod 600 $CONFIG
    echo "# Keyringer config file." > $CONFIG
    echo "" >> $CONFIG
  fi

  keyringer_config_load_preferences
}

function keyringer_config_load_preferences {
  # Load custom keyring preferences
  if [ ! -z "$PREFERENCES" ] && [ -f "$PREFERENCES" ]; then
    source $PREFERENCES
  fi
}

# Load a parameter from config
function keyringer_config {
  if [ -z "$CONFIG" ]; then
    echo "Your have to set CONFIG variable in the code"
    exit 1
  elif [ -e "$CONFIG" ]; then
    grep -e "^$1=" $CONFIG | tail -n 1 | cut -d = -f 2 | sed -e 's/"//g' -e "s/'//g" | sed -e 's/ *#.*$//'
  else
    echo "Config file not found: $CONFIG"
    exit 1
  fi
}

# Return the list of recipients
function keyringer_recipients {
  grep -v '^#' $1 | grep -v '^$' | awk '{ print "-r " $2 }' | xargs
}

# Check if keyringer has a given action
function keyringer_has_action {
 if [ -z "$ACTIONS" ]; then
   echo "Your have to set ACTIONS variable in the code"
   exit 1
 fi

 if [ -e "$ACTIONS/$1" ]; then
   true
 else
   false
 fi
}

# Execute an action
function keyringer_exec {
  # Setup
  action="$1"
  basedir="$2"
  shift 2
  
  # Dispatch
  if keyringer_has_action $action; then
    $ACTIONS/$action $basedir $*
  fi
}

# Return a filename with correct extension
function keyringer_filename {
  if [ -z "$1" ]; then
    return
  else
    echo `dirname $1`/`basename $1 .asc`.asc
  fi
}

# Check if a folder is inside a git repository
function keyringer_is_git {
  if [ -z "$1" ]; then
    false
  elif [ ! -d "$1" ]; then
    false
  elif [ -d "$1/.git" ]; then
    true
  else
    cwd="`pwd`"
    cd $1 && git="`git status &> /dev/null`" && cd $cwd

    if [ "$git" != "128" ]; then
      true
    else
      false
    fi
  fi
}

# Setup a temporary file
function keyringer_set_tmpfile {
  if [ -z "$BASEDIR" ]; then
    echo "Please set BASEDIR before creating a tmp file"
    exit 1
  fi

  if [ -z "$1" ]; then
    template="$BASEDIR/tmp/keyringer.XXXXXXXXXX"
  else
    template="$BASEDIR/tmp/$1.XXXXXXXXXX"
  fi

  mkdir -p $BASEDIR/tmp
  keyringer_git_ignore 'tmp/*'

  tmpfile="`mktemp $template`"
  
  if [ "$?" != "0" ]; then
    echo "Error: can't set tmpfile $tmpfile"
    exit 1
  fi

  echo $tmpfile
}

# Remove a temporary file
function keyringer_unset_tmpfile {
  if [ -z "$1" ]; then
    echo "No tmp file set"
  fi

  rm -f $1

  if [ "$?" != "0" ]; then
    echo "Warning: could not delete file $1. Please delete it manually as it might have sensitive information."
    exit 1
  fi
}

# Add a pattern into gitignore
function keyringer_git_ignore {
  if [ ! -z "$BASEDIR/.gitignore" ]; then
    echo $1 > $BASEDIR/.gitignore
    keyringer_exec git $BASEDIR add .gitignore
  else
    if ! grep -q -e "^$1$" $BASEDIR/.gitignore; then
      echo $1 >> $BASEDIR/.gitignore
    fi
  fi
}