#!/bin/bash
# file: gsl__post_manager
# Folder: /var/lib/gsl/scripts
# By echolib
# License: GNU AFFERO GENERAL PUBLIC LICENSE Version 3, 19 November 2007

#=======================================================================
# Check if posts from PWD folder
#=======================================================================
gsl__check_nbr_posts() {
gsl_nbr_posts=`ls -1 *.gsl 2>/dev/null | wc -l`

(( $gsl_nbr_posts == 0 )) \
  && echo "! No Posts found with .gsl extension"
}

#=======================================================================
# Read from Post list
#=======================================================================
gsl__loop_posts() {
for gsl_post in `ls -1 *.gsl 2>/dev/null`
do
  # Post too small
  gsl__post_hash_size
  if (( "$gsl_post_size" <= $gsl_post_min_size ));then
    gsl__logs_print \
      "$gsl_log_e" \
      "Post" \
      "Size" \
      "Too small $gsl_post_size <= $gsl_post_min_size" \
      "${PWD}/$gsl_post"
    continue
  fi

  case "$1" in
    check)
      if ! [[ "$gsl_force_check" ]];then
        gsl__post_compare_hash || continue
      fi
      
      gsl__logs_print \
        "$gsl_log_i" \
        "Reading" \
        "Post" \
        "$gsl_post" \
        "${PWD}"
      gsl__post_all_checkers
      
      # No error: Check/Write to DB (posts.db)
      gsl_process="Checked"
      gsl__db_line_post
      ;;
  
  make)
    gsl_process="Made"
    gsl__db_post_exists "$gsl_file_db_posts"
    if [[ "$gsl_db_post_status" == "Made" ]];then
      gsl__logs_print
        "$gsl_log_w" \
        "Post" \
        "Make" \
        "$gsl_post already Made (Converted)" \
        "$gsl_file_db_posts"
      continue
    fi
    ;;
  esac
done

[[ "$gsl_check_done" ]] \
  && echo "# All posts already checked"
}

#=======================================================================
# Get Post Hash
#=======================================================================
gsl__post_hash_size() {
gsl_post_csum=`cksum "$gsl_post"`
gsl_post_hash=`awk '{print $1}' <<< "$gsl_post_csum"`
gsl_post_size=`awk '{print $2}' <<< "$gsl_post_csum"`
}

#=======================================================================
# Check if Post has same Hash
#=======================================================================
gsl__post_compare_hash() {
gsl__db_post_hash
if [[ "$gsl_db_post_hash" == "$gsl_post_hash" ]];then
  gsl__logs_print \
    "$gsl_log_i" \
    "Post" \
    "Hash" \
    "$gsl_post already Checked from $gsl_post_hash" \
    "$gsl_file_db_posts"
  gsl_check_done=true
  return 1
fi
}

#-----------------------------------------------------------------------
#
# TOOLS. Getting line, markers, fields in headers...
#
#-----------------------------------------------------------------------
#=======================================================================
# Get line nbr from Post... $1: TERM | $2: File
#=======================================================================
gsl__get_line() {
awk -v s="$1" \
    'match($0,s) {print NR}' \
    "$2"
}

#=======================================================================
# Get everything after the marker... $1: marker | $2: File
#=======================================================================
gsl__get_header() {
awk -F"$1" -v marker="$1" \
    '{if ($0 ~ marker) print $2}' \
    "$2" 2>/dev/null
}

#=======================================================================
# Get fields from variable... $1: field | $2: variable
#=======================================================================
gsl__get_header_field() {
awk -F" : " -v f="$1" \
    'NFS=f {print $NFS}' \
    <<< "$2"
}

#=======================================================================
# Get line nbr from CONTENT Post... $1: TERM | $2: File
#=======================================================================
gsl__get_content_line() {
awk -v line="$gsl_post_begin" -v s="$1" \
    'NR >= line && $0 ~ s {print NR}' \
    "$2" || return
}

#=======================================================================
# Get CONTENT with marks | ! find from ONE line content
#=======================================================================
gsl__get_content_finder() {
# Get [OPTs]
while (( "$#" ))
  do
  case "$1" in
    -o) mk_o="$2" ;; # Open marker
    -c) mk_c="$2" ;; # Close Marker
    -b) mk_b="$2" ;; # Between markers
    -f) file="$2" ;; # In whole file
    -v) ivar="$2" ;; # In variable
    -n) line="n"  ;; # Give found line number
  esac
  shift
done

! [[ "$file" ]] && ! [[ "$ivar" ]] && return 1
! [[ "$mk_o" ]] && ! [[ "$mk_c" ]] && return 1
! [[ "$mk_b" ]] && mk_b='.*'

if [[ "$file" ]];then
  grep -oP$line "(?<=$mk_o)$mk_b?(?=$mk_c)" "$file" && return
elif [[ "$ivar" ]];then
  grep -oP$line "(?<=$mk_o)$mk_b?(?=$mk_c)" <<< "$ivar" && return
fi
}

#=======================================================================
# Get Fields and line nbr from header from marker
#=======================================================================
gsl__get_header_fields() {
gsl_post_header_field_1=`
gsl__get_header_field 1 "$gsl_header_content_line"`
gsl_post_header_field_2=`
gsl__get_header_field 2 "$gsl_header_content_line"`
gsl_post_header_field_3=`
gsl__get_header_field 3 "$gsl_header_content_line"`
gsl_post_header_line_nbr=`
gsl__get_line "$1$gsl_post_header_field_1" "$gsl_post"`
}

#=======================================================================
# Get Fields and line nbr from header from marker
#=======================================================================
gsl__check_header_fields() {
if  ! [[ "$gsl_post_header_field_1" ]] || \
    ! [[ "$gsl_post_header_field_2" ]];then

  gsl__logs_print \
    "$gsl_log_e" \
    "$1" \
    "$2" \
    "Line:$gsl_post_header_line_nbr > Content: $3" \
    "${PWD}/$gsl_post"
  gsl_checker_err=true
  return
fi
}