From 27d57c30050d02cd31f377fd86a72a105cd83ee8 Mon Sep 17 00:00:00 2001
From: Benjamin VAUDOUR <b.vaudour@luence.fr>
Date: Mon, 13 Dec 2021 16:48:17 +0000
Subject: [PATCH] =?UTF-8?q?Impl=C3=A9mentation=20de=20epdf=20info?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 aliases/qpdf.elv | 152 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 150 insertions(+), 2 deletions(-)

diff --git a/aliases/qpdf.elv b/aliases/qpdf.elv
index a5572ef..fdf2c48 100644
--- a/aliases/qpdf.elv
+++ b/aliases/qpdf.elv
@@ -1,3 +1,5 @@
+use math
+use path
 use re
 use str
 
@@ -240,7 +242,36 @@ fn zip {|@args|
 }
 
 fn unzip {|@args|
-  echo '<en construction…>'
+  var l = (- (count $args) 1)
+  if (< $l 2) {
+    fail 'unzip doit contenir au moins 3 paramètres'
+  }
+  var mod = $args[0]
+  var out = $args[$l]
+  -must-not-exist $out
+
+  var sel tmp = [] []
+  try {
+    set sel tmp = (-parse-all $args[1..$l])
+    var t       = (-make-tmp)
+    -merge $sel $t
+    set @tmp    = $@tmp $t
+    var @sels   = (range $mod | put [])
+    var end     = ($cmd --show-npages $t)
+    range $end | each {|i|
+      var m = (% $i $mod)
+      set sel[$m] = (+ $i 1)
+    }
+    mkdir $out
+    range $mod | each {|i|
+      var @pr = (str:join ',' $@sels[$i])
+      $cmd --empty --pages $t $@pr -- $out'/'(+ $i 1)'.pdf'
+    }
+  } finally {
+    if (> (count $tmp) 0) {
+      rm -f $@tmp
+    }
+  }
 }
 
 fn decrypt {|@args|
@@ -272,8 +303,125 @@ fn help {|@args|
   cat $E:HOME/.config/elvish/aliases/qpdf.help
 }
 
+fn -date {|raw|
+  var y m d = $raw[2..6] $raw[6..8] $raw[8..10]
+  var h n s = $raw[10..12] $raw[12..14] $raw[14..16]
+  var tz @_ = (str:split "'" $raw[16..])
+  var date = (printf ^
+    '%s-%s-%sT%s:%s:%s%s' ^
+    $y $m $d ^
+    $h $n $s ^
+    $tz)
+  date --date $date
+}
+
+fn -pts2cm {|v|
+  / (math:round (* $v 3.52778)) 100
+}
+
+fn -size {|size|
+  var u = 0
+  var m = [
+    &10=Kio
+    &20=Mio
+    &30=Gio
+  ]
+  while (< $u 30) {
+    var p = (math:pow 2 (+ $u 10))
+    if (< $size $p) {
+      break
+    }
+    set u = (to-string (+ $u 10))
+  }
+  if (== $u 0) {
+    put $size
+  } else {
+    var p = (math:pow 2 (+ $u 10))
+    var e = (/ $size $p)
+    printf '%.1f%s' $e $m[$u]
+  }
+}
+
+fn -b2str {|b|
+  if $b {
+    put 'Oui'
+  } else {
+    put 'Non'
+  }
+}
+
+fn -props {|input json|
+  var objects   = $json[objects]
+  var trailer   = $objects[trailer]
+  var iid       = $trailer[/Info]
+  var rid       = $trailer[/Root]
+  var info      = $objects[$iid]
+  var root      = $objects[$rid]
+  var pages     = $objects[$root[/Pages]]
+  var p1        = $objects[$pages[/Kids][0]][/MediaBox]
+
+  var w         = (-pts2cm $p1[2])
+  var h         = (-pts2cm $p1[3])
+  var layout    = 'Portrait'
+  if (> $w $h) {
+    set layout = 'Paysage'
+  }
+
+  var props = [
+    &path=(path:abs $input)
+    &fsize=(-size (stat -c '%s' $input))
+    &version=''
+    &psize=(printf '%sx%s cm (%s)' $w $h $layout)
+    &pages=$pages[/Count]
+    &title=''
+    &subject=''
+    &author=''
+    &producer=$info[/Producer]
+    &creator=$info[/Creator]
+    &cdate=(-date $info[/CreationDate])
+    &mdate=''
+    &acroform=(-b2str $json[acroform][hasacroform])
+    &encrypted=(-b2str $json[encrypt][encrypted])
+  ]
+  
+  #@TODO: version pdf
+  if (has-key $info '/Title') {
+    set props[title] = $info[/Title]
+  }
+  if (has-key $info '/Subject') {
+    set props[subject] = $info[/Subject]
+  }
+  if (has-key $info '/Author') {
+    set props[author] = $info[/Author]
+  }
+  if (has-key $info '/ModDate') {
+    set props[mdate] = (-date $info[/ModDate])
+  }
+
+  put $props
+}
+
 fn info {|@args|
-  echo '<en construction…>'
+  var input = $args[0]
+  var json  = ($cmd --json $input | from-json)
+  var props = (-props $input $json)
+
+  echo '               Chemin: '$props[path]
+  echo '               Taille: '$props[fsize]
+  echo '          Version PDF: '$props[version]
+  echo '     Taille des pages: '$props[psize]
+  echo '      Nombre de pages: '$props[pages]
+  echo '............................................'
+  echo '                Titre: '$props[title]
+  echo '                Sujet: '$props[subject]
+  echo '               Auteur: '$props[author]
+  echo '             Créateur: '$props[creator]
+  echo '           Producteur: '$props[producer]
+  echo '     Date de création: '$props[cdate]
+  echo ' Date de modification: '$props[mdate]
+  echo '............................................'
+  echo '              Chiffré: '$props[encrypted]
+  echo '             Acroform: '$props[acroform]
 }
 
 edit:add-var epdf~ {|action @args|