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

#-----------------------------------------------------------------------
# -----------------------------------------------------------
# MAIN LOOP. Read from Post list. Do according to Post Status
# -----------------------------------------------------------
#-----------------------------------------------------------------------
gsl__loop_posts() {
gsl__logs_print \
  "$gsl_log_i" \
  "Found" \
  "Posts" \
  "$gsl_nbr_posts" \
  "${PWD}"

for gsl_post in `ls -1 *.gsl 2>/dev/null`
do
  # Check specific asked Post
  if [[ "$gsl_this_post" ]];then
    ! [[ "$gsl_post" == "$gsl_this_post" ]] && continue
  fi
  
  # 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

  # From COMMAND [OPT]
  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_process="Checked"
      gsl__all_checkers
      ;;
  
  make)
    gsl_process="Made"
    gsl__db_exists "$gsl_file_db_posts"
    case "$gsl_db_post_status" in
      Checked)
        gsl__post_compare_hash || continue
        gsl__all_makers
        ;;
      
      Made)
        gsl__logs_print
          "$gsl_log_w" \
          "Post" \
          "Make" \
          "$gsl_post already Converted" \
          "$gsl_file_db_posts"
        continue
        ;;
    esac
    ;;
  esac
done

[[ "$gsl_checker_war" ]] \
  && gsl log -s -w

[[ "$gsl_checker_err" ]] \
  && gsl log -s -e
  
[[ "$gsl_check_done" ]] \
  && echo "# Check already done"
}

#-----------------------------------------------------------------------
# --------------------
# Doing some checkings
# --------------------
#-----------------------------------------------------------------------

#=======================================================================
# Check NAME post from [OPT] ; should be from autocompletion
#=======================================================================
gsl__check_opt_post() {
[[ `ls -1 *.gsl | grep "$1"` ]] \
  && gsl_this_post="$1"
}

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

! (( $gsl_nbr_posts >= 1 )) \
  && echo "! No Posts found with .gsl extension" \
  && exit 1
}

#=======================================================================
# Check if Post has same Hash
#=======================================================================
gsl__post_compare_hash() {
gsl__db_post_hash

case "$gsl_process" in
  Checked)
    if [[ "$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
    ;;
  
  Made)
    if ! [[ "$gsl_db_post_hash" == "$gsl_post_hash" ]];then
      gsl__logs_print \
        "$gsl_log_e" \
        "Post" \
        "Hash" \
        "$gsl_post has changed. Check it again" \
        "$gsl_file_db_posts"
      unset gsl_check_done
      gsl_checker_err=true
      return 1
    fi
    
    # Compare external content hash
    while read "gsl_content_filename"
    do
      #unset gsl_db_file_hash gsl_file_hash
      ! [[ "$gsl_content_filename" ]] && continue
      gsl_db_file_hash=`
      grep "$gsl_content_filename" "$gsl_file_db_files" \
          | awk -F: '{print $2}'`
      gsl_file_hash=`
      cksum "$gsl_dir_domain_files/$gsl_content_filename" \
          | awk '{print $1}'`

      if ! [[ "$gsl_db_file_hash" == "$gsl_file_hash" ]];then
        gsl__logs_print \
          "$gsl_log_w" \
          "File" \
          "Hash" \
          "$gsl_content_filename has changed. $gsl_db_file_hash $gsl_file_hash" \
          "$gsl_file_db_files"
        gsl_checker_war=true
        return 1
      fi
    done < <(grep "$gsl_post" "$gsl_file_db_posts" \
                | awk -F"|" \
                      '{for(i=7;i<=NF;i++){print $i}}')
    ;;
esac
}

#=======================================================================
# Check NEEDED Fields from HEADER
#=======================================================================
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
}

#=======================================================================
# Check OPTIONAL Field 3 from HEADER
#=======================================================================
gsl__check_header_field3() {
if ! [[ "$gsl_post_header_field_3" ]];then
  case "$2" in
  Image)
    gsl__logs_print \
      "$gsl_log_e" \
      "$1" \
      "$2" \
      "Line:$gsl_post_header_line_nbr > No ALT TEXT ?" \
      "${PWD}/$gsl_post"
    gsl_checker_err=true
    ;;
  *)
    gsl__logs_print \
      "$gsl_log_w" \
      "$1" \
      "$2" \
      "Line:$gsl_post_header_line_nbr > No ALT TEXT ?" \
      "${PWD}/$gsl_post"
    gsl_checker_war=true
    ;;
  esac
fi
}

#-----------------------------------------------------------------------
# --------------
# Tools for Post
# --------------
#-----------------------------------------------------------------------

#=======================================================================
# 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"`
}

#=======================================================================
# 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="$1" -v l="$gsl_post_begin" \
    'NR < l && $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 Post with markers... $1: Open Marker | $2: Close Marker
#=======================================================================
gsl__get_content_with_markers() {
gsl__get_content_finder \
    -o "$1" \
    -b "$gsl_post_header_field_1" \
    -c "$2" \
    -f "$gsl_post" \
  | tail -1 \
  || 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 NEEDED HEADERS | $1 VAR CONTENT $2 LOG Proc $3 LOG Act
#=======================================================================
gsl__check_needed_headers() {
! [[ "$1" ]] \
  && gsl__logs_print \
       "$gsl_log_e" \
       "Post" \
       "Header $2" \
       "Missing: POST TITLE" \
       "${PWD}/$gsl_post" \
  && gsl_checker_err=true
}


#=======================================================================
# 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"`
}