The existing code mixes parsing of email header with regular
expression and actual code. Extract the parsing code into a new
subroutine "parse_header_line()". This improves the code readability
and make parse_header_line reusable in other place.

"parsed_header_line()" and "filter_body()" could be used for refactoring
the part of code which parses the header a last time to prepare the
email and send it.

Signed-off-by: Nathan Payre <nathan.pa...@etu.univ-lyon1.fr>
Signed-off-by: Matthieu Moy <matthieu....@univ-lyon1.fr>
Signed-off-by: Timothee Albertin <timothee.alber...@etu.univ-lyon1.fr>
Signed-off-by: Daniel Bensoussan <daniel.bensoussan--b...@etu.univ-lyon1.fr>
Signed-off-by: Junio C Hamano <gits...@pobox.com>
Thanks-to: Ævar Arnfjörð Bjarmason <ava...@gmail.com>
---

This patch fixes the indentation problem and reduce lines over 80 characters.

 git-send-email.perl | 102 ++++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 75 insertions(+), 27 deletions(-)

diff --git a/git-send-email.perl b/git-send-email.perl
index 2208dcc21..b64f8872d 100755
--- a/git-send-email.perl
+++ b/git-send-email.perl
@@ -715,41 +715,60 @@ EOT3
        if (!defined $compose_encoding) {
                $compose_encoding = "UTF-8";
        }
-       while(<$c>) {
-               next if m/^GIT:/;
-               if ($in_body) {
-                       $summary_empty = 0 unless (/^\n$/);
-               } elsif (/^\n$/) {
-                       $in_body = 1;
-                       if ($need_8bit_cte) {
+
+
+       my %parsed_email;
+       $parsed_email{'body'} = '';
+       while (my $line = <$c>) {
+               next if $line =~ m/^GIT:/;
+               parse_header_line($line, \%parsed_email);
+               if ($line =~ /^\n$/i) {
+                       $parsed_email{'body'} = filter_body($c);
+               }
+       }
+
+       if ($parsed_email{'from'}) {
+               $sender = $parsed_email{'from'};
+       }
+       if ($parsed_email{'in-reply-to'}) {
+               $initial_reply_to = $parsed_email{'in-reply-to'};
+       }
+       if ($parsed_email{'subject'}) {
+               $initial_subject = $parsed_email{'subject'};
+               print $c2 "Subject: " .
+                       quote_subject($parsed_email{'subject'}, 
$compose_encoding) .
+                       "\n";
+       }
+       if ($parsed_email{'mime-version'}) {
+               $need_8bit_cte = 0;
+               print $c2 "MIME-Version: $parsed_email{'mime-version'}\n",
+                               "Content-Type: 
$parsed_email{'content-type'};\n",
+                               "Content-Transfer-Encoding: 
$parsed_email{'content-transfer-encoding'}\n";
+       }
+       if ($need_8bit_cte) {
+               if ($parsed_email{'content-type'}) {
+                               print $c2 "MIME-Version: 1.0\n",
+                                        "Content-Type: 
$parsed_email{'content-type'};",
+                                        "Content-Transfer-Encoding: 8bit\n";
+                       } else {
                                print $c2 "MIME-Version: 1.0\n",
                                         "Content-Type: text/plain; ",
-                                          "charset=$compose_encoding\n",
+                                        "charset=$compose_encoding\n",
                                         "Content-Transfer-Encoding: 8bit\n";
                        }
-               } elsif (/^MIME-Version:/i) {
-                       $need_8bit_cte = 0;
-               } elsif (/^Subject:\s*(.+)\s*$/i) {
-                       $initial_subject = $1;
-                       my $subject = $initial_subject;
-                       $_ = "Subject: " .
-                               quote_subject($subject, $compose_encoding) .
-                               "\n";
-               } elsif (/^In-Reply-To:\s*(.+)\s*$/i) {
-                       $initial_reply_to = $1;
-                       next;
-               } elsif (/^From:\s*(.+)\s*$/i) {
-                       $sender = $1;
-                       next;
-               } elsif (/^(?:To|Cc|Bcc):/i) {
-                       print __("To/Cc/Bcc fields are not interpreted yet, 
they have been ignored\n");
-                       next;
-               }
-               print $c2 $_;
        }
+       if ($parsed_email{'body'}) {
+               $summary_empty = 0;
+               print $c2 "\n$parsed_email{'body'}\n";
+       }
+
        close $c;
        close $c2;
 
+       open $c2, "<", $compose_filename . ".final"
+               or die sprintf(__("Failed to open %s.final: %s"), 
$compose_filename, $!);
+       close $c2;
+
        if ($summary_empty) {
                print __("Summary email is empty, skipping it\n");
                $compose = -1;
@@ -792,6 +811,35 @@ sub ask {
        return;
 }
 
+sub parse_header_line {
+       my $lines = shift;
+       my $parsed_line = shift;
+       my $pattern1 = join "|", qw(To Cc Bcc);
+       my $pattern2 = join "|",
+               qw(From Subject Date In-Reply-To Message-ID MIME-Version 
+                       Content-Type Content-Transfer-Encoding References);
+       
+       foreach (split(/\n/, $lines)) {
+               if (/^($pattern1):\s*(.+)$/i) {
+                       $parsed_line->{lc $1} = [ parse_address_line($2) ];
+               } elsif (/^($pattern2):\s*(.+)\s*$/i) {
+                       $parsed_line->{lc $1} = $2;
+               }
+       }
+}
+
+sub filter_body {
+       my $c = shift;
+       my $body = "";
+       while (my $body_line = <$c>) {
+               if ($body_line !~ m/^GIT:/) {
+                       $body = $body . $body_line;
+               }
+       }
+       return $body;
+}
+
+
 my %broken_encoding;
 
 sub file_declares_8bit_cte {
-- 
2.15.1

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