#!/bin/sh

# Script to validate I_say_so certificates.
# This script should be invoked from cert.
# It expects "$PROGRAMATICA" and "$certsDir" to be set.
# It also expects the name of a certificate on the command line.

type=I_say_so

[ -n "$PROGRAMATICA" ] || { echo >&2 'Bug: $PROGRAMATICA is not set'; exit 1;}
. "$PROGRAMATICA/validation.sh" # Sets assertion, attr, conc, deps, module


### Auxiliary functions ########################################################

validate() {
  echo "Sequent: $hyp |- $conc"
  echo "Do you want to mark the $type certificate $cert valid [no]?"
  if user_confirmation ; then
    markvalid
  else
    #echo "Since you didn't answer yes, the certificate remains invalid."
    markinvalid
  fi
}

validatenew() {
  echo "The certificate $cert for assertion $conc has not previously"
  echo "been validated. Here the are names of the entities it might depend on:"
  echo ""
  pfe needed "$assertion"
  echo ""
  validate
}

revalidate() {
  if [ -s "$tmpdiff" ] ; then
    echo "The following changes might affect the validity of"
    echo "the $type certificate $cert:"
    echo ""
    cat "$tmpdiff"
    echo ""
    validate
  else
    echo "There has been no changes affecting the validity of"
    echo "the $type certificate $cert. Marking it as still valid."
    datestamp valid $certpath $module
  fi
}

### Here we go... ##############################################################

tmpdiff="$certsDir/diff$$"

if [ -r "$deps" ] && pfe tadiff "$deps" "$assertion" >"$tmpdiff" ; then
  revalidate
else
  validatenew
fi
status=$?
rm -f "$tmpdiff"
exit $status