#!/bin/bash
# Name: Statique Littérateur
# Type: Sidebar manager
# file: manage__sidebar
# Folder: /var/lib/stl/scripts/
# By echolib (XMPP: im@echolib.re)
# License: GNU AFFERO GENERAL PUBLIC LICENSE Version 3, 19 November 2007

#------------
# funny stats
#------------
# lines: 319
# functions: 5
#-----------------------------------------------------------------------

#**********************************************************************

#======================================================================
# Sidebar: Manage arguments
# Check Article, WIP and Position
#======================================================================
sidebar__OPTIONS() {
[[ $sdb_load ]] || domain__get

case "$2" in
  create)
    domain__get
    sidebar__create_HTML
    return
    ;;

  load)
    sidebar__load
    return
    ;;

  add)
    # Argument article
    ! [[ "$4" ]] \
      && noarg "$4" "Use: sidebar add (POS) (ARTICLE)" \
      && exit

    # Position. Must be numeric: 1 to max_items
    [[ "$3" == *[!0-9]* ]] \
      && noarg "$3" "Use numeric position: 1 to $domain_siddebar_items" \
      && exit

    # Position mismatches values
    (( "$3" == 0 || "$3" > $domain_sidebar_items )) \
      && noarg "$3" "Use position 1 to $domain_siddebar_items" \
      && exit

    # Article
    article__hash "$4"
    if__article_db "$article_db"

    # Article not yet checked
    if ! [[ $db_exists ]];then
      log__add -e -S -A \
               "'$article_title' is not yet checked"

      # sidebar load
      [[ $sdb_load ]] && item=$(( item - 1 ))
      return
    fi

    # article is checked and newer than WIP one
    if [[ $old_wip ]];then
      log__add -e -S -A \
               "$sync_mess"
      
      # sidebar load
      [[ $sdb_load ]] && item=$(( item - 1 ))
      return
    fi

    # WIP check
    if ! [[ $article_wip_hash ]];then
      log__add -e -S -A \
               "'$article_title' is not yet converted in HTML"
      
      # sidebar load
      [[ $sdb_load ]] && item=$(( item - 1 ))
      return
    fi

    # Already in sidebar at same position
    if [[ "$3" == $sidebar_position ]];then
      log__add -w -S -A \
               "'$article_title' is already at position: $3"
      
      return
    fi

    # Already in sidebar, different position
    if [[ $sidebar_position ]];then
      sed -i "s^sidebar_position=.*^sidebar_position=^" "$db_file"
      if [[ -f "$domain_dir_sidebar/.$sidebar_position.sidebar" ]];then
        rm -f "$domain_dir_sidebar/.$sidebar_position.sidebar"
        log__add -w -S -rm \
                 "$article_title at position: $sidebar_position"
      fi
    fi

    # Create HTML idem file
    mkdir -p "$domain_dir_sidebar" # ensure articles/sidebar is creeated
    position="$3"
    sidebar_HTML_item="$domain_dir_sidebar/.$3.sidebar"
    sidebar_add=true
    ;;

  latest|oldest)
    domain__get
    ;;

  *)
    noarg "$2" "Use: load, add, latest, oldest, create"
    ;;
esac

# Start process
sidebar__manage "$2" "$position" "$sidebar_HTML_item"
}


#======================================================================
# Sidebar: create /templates/sidebar.html
# $1: Process (add, replace...)
# $2: Position
# $3: file (.POS.sidebar) in wip template
#======================================================================
sidebar__manage() {
case "$1" in
  latest|-l) sort_arg='-k2'  ;;
  oldest|-o) sort_arg='-k2r' ;;
esac

case "$1" in
  latest|oldest)  
    sidebar_pos=0
    while IFS=: read -r 'file' 'timestamp'
    do

      ((position++))
      (( $position > $domain_sidebar_items )) \
        && break

      file=`basename "$file"`
      db_file="$domain_db_articles/$file"
      source "$db_file"

      ! [[ $article_wip_hash -gt 0 ]] \
        && continue

      sidebar_HTML_item="$domain_dir_sidebar/.$position.sidebar"
      sidebar__create_HTML_item "$sidebar_HTML_item"

    done < <(grep -H "article_timestamp" "$domain_db_articles/"*.db \
                | sort -t= $sort_arg )
    ;;

  add)
    sidebar__create_HTML_item "$3"
    ;;
esac

# sidebar load: do not create the complete  sidebar now
[[ $sdb_load ]] && return

sidebar__create_HTML
}


#======================================================================
# Called from sidebar__create in gsl__post_makers
# file: /var/lib/gsl/domains/DOMAIN/X-tra/sidebar/[POSITION].html
# You can edit this HTML code for your needs
# It can get all Values from Database post
# $1: file ($sidebar_HTML_item)
#======================================================================
sidebar__create_HTML_item() {
create__HTML_sidebar_item "$1"

# Log added
log__add -i -S -A "$article_title added to position: $position"

# Unset sidebar position in DB if an article is at position
db_file_sidebar=`
grep -H "sidebar_position=$position" \
        "$domain_db_articles/"*.db  \
   | awk -F: '{print $1}'`

# Add value to DB
sed -i "s^sidebar_position=.*^sidebar_position=$position^" "$db_file"

# If position is used by another article
if [[ $db_file_sidebar ]];then
  source "$db_file_sidebar"
  sed -i "s^sidebar_position=.*^sidebar_position=^" "$db_file_sidebar"
  
  # Create log for this other article
  uri_src=${article_uri_src:1}
  article__hash "$uri_src"
  log__add -w -S -rm "$article_title at position: $position"
fi
}



#======================================================================
# Create sidebar.html from files .(1-MAX).sidebar
#======================================================================
sidebar__create_HTML() {
if [[ -f "$domain_dir_wip_tpl/sidebar.html" ]];then
  rm -f "$domain_dir_wip_tpl/sidebar.html"
  this_article="$domain_dir_wip_tpl/sidebar.html"
  log__add -w -S -rm \
           "Create new"
fi

for i in `seq 1 $domain_sidebar_items`
do
  [[ -f "$domain_dir_sidebar/.$i.sidebar" ]] \
    && cat "$domain_dir_sidebar/.$i.sidebar" \
        >> "$domain_dir_wip_tpl/sidebar.html"
done

this_article="$domain_dir_wip_tpl/sidebar.html"
log__add -i -M -rs "Created items from 1 to $domain_sidebar_items"
}


#======================================================================
# Specific. Loading static stl.sidebar and create sidebar
#======================================================================
sidebar__load() {
sdb_load=true
domain__get

mkdir -p "$domain_dir_sidebar" # ensure articles/sidebar is creeated

# Not yet configured (for older versions)
! [[ "$domain_file_sidebar_load" ]] \
  && echo "! Unused configuration for sidebar. Type: stl update" \
  && exit

# Create, stl.sidebar file (if not exists)
if ! [[ -f "$domain_file_sidebar_load" ]];then
  create__file_sidebar_load # manage__domain
  echo "# Static sidebar file created: $domain_file_sidebar_load"
  
  # Get sidebar hash, create default id file
  sidebar_hash=`cksum "$domain_file_sidebar_load" | awk '{print $1}'`
  touch "$domain_dir_sidebar/.id.sidebar"
  echo "user_sidebar=$sidebar_hash" \
     > "$domain_dir_sidebar/.id.sidebar"
  exit
fi

# Get sidebar hash
sidebar_hash=`cksum "$domain_file_sidebar_load" | awk '{print $1}'`

# Check .id.sidebar file
if ! [[ -f "$domain_dir_sidebar/.id.sidebar" ]];then
  touch "$domain_dir_sidebar/.id.sidebar"
  echo "user_sidebar=$sidebar_hash" \
     > "$domain_dir_sidebar/.id.sidebar"

fi

source "$domain_dir_sidebar/.id.sidebar"
case "$sidebar_hash" in
  # Default file
  "4269375654"|"2074433654")
    echo "! Sidebar not yet configured: $domain_file_sidebar_load"
    exit
    ;;

  "$user_sidebar")
    echo "! No changes in $domain_file_sidebar_load"
    exit
    ;;

  *)
    echo "user_sidebar=$sidebar_hash" \
       > "$domain_dir_sidebar/.id.sidebar"
    ;;
esac

# loop stl.sidebar lines
item=0
while read -r "line"
do 
  # Ignore comments, empty lines
  [[ "$line" =~ ^'#' ]] || [[ -z "$line" ]] && continue
  
  # Remove first / if found
  [[ ${line::1} == '/' ]] && line=${line:1}

  # Get from DB if exists
  db_file=`
  grep -H "article_uri_src='/$line'" $domain_db_articles/*.db \
     | head -n 1 \
     | awk -F: '{print $1}'`

  # Article not yet checked
  [[ "$db_file" ]] || continue

  ((item++))
  sidebar__OPTIONS " " add "$item" "$line"
  
  # Count to max definded items
  (( $item > $domain_sidebar_items )) && break

done <"$domain_dir_sidebar/stl.sidebar"

# Create HTML sidebar if an article is added
[[ $sidebar_add ]] && sidebar__create_HTML
}