+<& dumptable:start, qa => $qa, sth => $sth &>
+% {
+% my $got;
+% while ($got= $sth->fetchrow_hashref()) {
+<%perl>
+
+ my $f= $flows[$#flows];
+ if ( !$f ||
+ $qa->{ShowStalls} ||
+ grep { $f->{$_} ne $got->{$_} }
+ qw(org_id org_price dst_id dst_price commodid)
+ ) {
+ # Make a new flow rather than adding to the existing one
+
+ $f= {
+ Ix => scalar(@flows),
+ Var => "f".@flows,
+ %$got
+ };
+ $f->{"org_stallid"}= $f->{"dst_stallid"}= 'all'
+ if !$qa->{ShowStalls};
+ push @flows, $f;
+ }
+ foreach my $od (qw(org dst)) {
+ $f->{"${od}Stalls"}{
+ $got->{"${od}_stallname"}
+ } =
+ $got->{"${od}_qty_stall"}
+ ;
+ }
+
+</%perl>
+<& dumptable:row, qa => $qa, sth => $sth, row => $f &>
+% }
+<& dumptable:end, qa => $qa &>
+% }
+
+<%perl>
+
+if (!@flows) {
+ print 'No profitable trading opportunities were found.';
+ return;
+}
+
+foreach my $f (@flows) {
+
+ $f->{MaxQty}= $f->{'org_qty_agg'} < $f->{'dst_qty_agg'}
+ ? $f->{'org_qty_agg'} : $f->{'dst_qty_agg'};
+ $f->{MaxProfit}= $f->{MaxQty} * $f->{'unitprofit'};
+ $f->{MaxCapital}= $f->{MaxQty} * $f->{'org_price'};
+
+ $f->{MaxMassSortKey}= $f->{MaxQty} * $f->{'unitmass'};
+ $f->{MaxVolumeSortKey}= $f->{MaxQty} * $f->{'unitvolume'};
+ foreach my $v (qw(Mass Volume)) {
+ $f->{"Max$v"}= sprintf "%.1f", $f->{"Max${v}SortKey"} * 1e-6;
+ }
+
+ $f->{MarginSortKey}= sprintf "%d",
+ $f->{'dst_price'} * 10000 / $f->{'org_price'};
+ $f->{Margin}= sprintf "%3.1f%%",
+ $f->{'dst_price'} * 100.0 / $f->{'org_price'} - 100.0;
+
+ $f->{ExpectedUnitProfit}=
+ $f->{'dst_price'} * (1.0 - $loss_per_league) ** $f->{'dist'}
+ - $f->{'org_price'};
+
+ $dists{'org_id'}{'dst_id'}= $f->{'dist'};
+
+ my @uid= $f->{commodid};
+ foreach my $od (qw(org dst)) {
+ push @uid,
+ $f->{"${od}_id"},
+ $f->{"${od}_price"};
+ push @uid,
+ $f->{"${od}_stallid"}
+ if $qa->{ShowStalls};
+ }
+ $f->{UidLong}= join '_', @uid;
+
+ my $base= 31;
+ my $cmpu= '';
+ map {
+ my $uue= $_;
+ my $first= $base;
+ do {
+ my $this= $uue % $base;
+print STDERR "uue=$uue this=$this ";
+ $uue -= $this;
+ $uue /= $base;
+ $this += $first;
+ $first= 0;
+ $cmpu .= chr($this + ($this < 26 ? ord('a') :
+ $this < 52 ? ord('A')-26
+ : ord('0')-52));
+print STDERR " uue=$uue this=$this cmpu=$cmpu\n";
+die "$cmpu $uue ?" if length $cmpu > 20;
+ } while ($uue);
+ $cmpu;
+ } @uid;
+ $f->{UidShort}= $cmpu;
+
+ if ($qa->{'debug'}) {
+ my @outuid;
+ $_= $f->{UidShort};
+ my $mul;
+ while (m/./) {
+ my $v= m/^[a-z]/ ? ord($&)-ord('a') :
+ m/^[A-Z]/ ? ord($&)-ord('A')+26 :
+ m/^[0-9]/ ? ord($&)-ord('0')+52 :
+ die "$_ ?";
+ if ($v >= $base) {
+ push @outuid, 0;
+ $v -= $base;
+ $mul= 1;
+#print STDERR "(next)\n";
+ }
+ die "$f->{UidShort} $_ ?" unless defined $mul;
+ $outuid[$#outuid] += $v * $mul;
+
+#print STDERR "$f->{UidShort} $_ $& v=$v mul=$mul ord()=".ord($&).
+# "[vs.".ord('a').",".ord('A').",".ord('0')."]".
+# " outuid=@outuid\n";
+
+ $mul *= $base;
+ s/^.//;
+ }
+ my $recons_long= join '_', @outuid;
+ $f->{UidLong} eq $recons_long or
+ die "$f->{UidLong} = $f->{UidShort} = $recons_long ?";
+ }
+
+ if (defined $qa->{"R$f->{UidShort}"} &&
+ !defined $qa->{"T$f->{UidShort}"}) {
+ $f->{Suppress}= 1;
+ }
+
+}
+</%perl>
+
+% my $optimise= $specific && !$confusing && @islandids>1;
+% if (!$optimise) {
+
+<p>
+% if (@islandids<=1) {
+Route contains only one location.
+% }
+% if (!$specific) {
+Route contains archipelago(es), not just specific islands.
+% }
+% if ($confusing) {
+Route is complex - it visits the same island several times
+and isn't a simple loop.
+% }
+Therefore, optimal voyage trade plan not calculated.
+
+% } else { # ========== OPTMISATION ==========
+<%perl>
+
+my $cplex= "
+Maximize
+
+ totalprofit:
+ ".(join "
+ ", map {
+ sprintf "%+.20f %s", $_->{ExpectedUnitProfit}, $_->{Var}
+ } @flows)."
+
+Subject To
+";
+
+my %avail_csts;
+foreach my $flow (@flows) {
+ if ($flow->{Suppress}) {
+ $cplex .= "
+ $flow->{Var} = 0
+";
+ next;
+ }
+ foreach my $od (qw(org dst)) {
+ my $cstname= join '_', (
+ 'avail',
+ $flow->{'commodid'},
+ $od,
+ $flow->{"${od}_id"},
+ $flow->{"${od}_price"},
+ $flow->{"${od}_stallid"},
+ );
+
+ push @{ $avail_csts{$cstname}{Flows} }, $flow->{Var};
+ $avail_csts{$cstname}{Qty}= $flow->{"${od}_qty_agg"};
+ }
+}
+foreach my $cstname (sort keys %avail_csts) {
+ my $c= $avail_csts{$cstname};
+ $cplex .= "
+ ". sprintf("%-30s","$cstname:")." ".
+ join("+", @{ $c->{Flows} }).
+ " <= ".$c->{Qty}."\n";
+}
+
+foreach my $ci (0..($#islandids-1)) {
+ my @rel_flows;
+ foreach my $f (@flows) {
+ next if $f->{Suppress};
+ next if $f->{'org_id'} == $f->{'dst_id'};
+ next unless grep { $f->{'org_id'} == $_ }
+ @islandids[0..$ci];
+ next unless grep { $f->{'dst_id'} == $_ }
+ @islandids[$ci+1..@islandids-1];
+ push @rel_flows, $f;
+#print " RELEVANT $ci $f->{Ix} ";
+ }
+#print " RELEVANT $ci COUNT ".scalar(@rel_flows)." ";
+ next unless @rel_flows;
+ foreach my $mv (qw(mass volume)) {
+ my $max_vn= "max_$mv";
+ my $max= $mv eq 'mass' ? $max_mass : $max_volume;
+ next unless defined $max;
+#print " DEFINED MAX $mv $max ";
+ $cplex .= "
+ ". sprintf("%-10s","${mv}_$ci:")." ".
+ join(" + ", map { ($_->{"unit$mv"}*1e-3).' f'.$_->{Ix} } @rel_flows).
+ " <= $max";
+ }
+ $cplex.= "\n";
+}
+
+$cplex.= "
+Bounds
+ ".(join "
+ ", map { "$_->{Var} >= 0" } @flows)."
+
+";
+
+$cplex.= "
+Integer
+ ".(join "
+ ", map { "f$_" } (0..$#flows))."
+
+End
+";
+
+if ($qa->{'debug'}) {
+</%perl>
+<pre>
+<% $cplex |h %>
+</pre>
+<%perl>
+}
+
+{
+ my $input= pipethrough_prep();
+ print $input $cplex or die $!;
+ my $output= pipethrough_run_along($input, undef, 'glpsol',
+ qw(glpsol --cpxlp /dev/stdin -o /dev/stdout));
+ print "<pre>\n" if $qa->{'debug'};
+ my $found_section= 0;
+ my $glpsol_out= '';
+ while (<$output>) {
+ $glpsol_out.= $_;
+ print encode_entities($_) if $qa->{'debug'};
+ if (m/^\s*No\.\s+Column name\s+(?:St\s+)?Activity\s/) {
+ die if $found_section>0;
+ $found_section= 1;
+ next;
+ }
+ next unless $found_section==1;
+ next if m/^[- ]+$/;
+ if (!/\S/) {
+ $found_section= 2;
+ next;
+ }
+ my ($ix, $qty) =
+ m/^\s*\d+\s+f(\d+)\s+\S+\s+(\d+)\s/ or die "$_ ?";
+ my $flow= $flows[$ix] or die;
+ $flow->{OptQty}= $qty;
+ $flow->{OptProfit}= $flow->{'unitprofit'} * $qty;
+ $flow->{OptCapital}= $flow->{OptQty} * $flow->{'org_price'};
+ }
+ print "</pre>\n" if $qa->{'debug'};
+ my $prerr= "\n=====\n$cplex\n=====\n$glpsol_out\n=====\n ";
+ pipethrough_run_finish($output,$prerr);
+ die $prerr unless $found_section;
+};
+
+$addcols->({ DoReverse => 1, Special => sub {
+ my ($flow,$col,$v,$spec) = @_;
+ if ($flow->{ExpectedUnitProfit} < 0) {
+ $spec->{Span}= 3;
+ $spec->{String}= '(Small margin)';
+ $spec->{Align}= 'align=center';
+ }
+} }, qw(
+ OptQty
+ ));
+$addcols->({ Total => 0, DoReverse => 1 }, qw(
+ OptCapital OptProfit
+ ));
+
+</%perl>
+
+% } # ========== OPTIMISATION ==========
+
+% my %ts_sortkeys;
+% {
+% my $cdspan= $qa->{ShowStalls} ? ' colspan=2' : '';
+% my $cdstall= $qa->{ShowStalls} ? '<th>Stall</th>' : '';
+<table id="trades" rules=groups>
+<colgroup span=1>
+<colgroup span=2>
+<% $qa->{ShowStalls} ? '<colgroup span=2>' : '' %>
+<colgroup span=1>
+<colgroup span=2>
+<colgroup span=2>
+<colgroup span=2>
+<colgroup span=3>
+<colgroup span=3>
+% if ($optimise) {
+<colgroup span=3>
+% }
+<tr class="spong">
+<th>
+<th<% $cdspan %>>Collect
+<th<% $cdspan %>>Deliver
+<th>
+<th colspan=2>Collect
+<th colspan=2>Deliver
+<th colspan=2>Profit
+<th colspan=3>Max
+<th colspan=1>
+<th colspan=2>Max
+% if ($optimise) {
+<th colspan=3>Planned
+% }
+
+<tr>
+<th>
+<th>Island <% $cdstall %>
+<th>Island <% $cdstall %>
+<th>Commodity
+<th>Price
+<th>Qty
+<th>Price
+<th>Qty
+<th>Margin
+<th>Unit
+<th>Qty
+<th>Capital
+<th>Profit
+<th>Dist
+<th>Mass
+<th>Vol
+% if ($optimise) {
+<th>Qty
+<th>Capital
+<th>Profit
+% }
+% }
+
+<tr id="trades_sort">
+% foreach my $col (@cols) {
+<th>
+% }
+
+% foreach my $flowix (0..$#flows) {
+% my $flow= $flows[$flowix];
+% my $rowid= "id_row_$flow->{UidShort}";
+<tr id="<% $rowid %>" class="datarow<% $flowix & 1 %>">
+<td><input type=hidden name=R<% $flow->{UidShort} %> value="">
+ <input type=checkbox name=T<% $flow->{UidShort} %> value=""
+ <% $flow->{Suppress} ? '' : 'checked' %> >
+% my $ci= 1;
+% while ($ci < @cols) {
+% my $col= $cols[$ci];
+% my $spec= {
+% Span => 1,
+% Align => ($col->{Text} ? '' : 'align=right')
+% };
+% my $v= $flow->{$col->{Name}};
+% if ($col->{Special}) { $col->{Special}($flow,$col,$v,$spec); }
+% $col->{Total} += $v
+% if defined $col->{Total} and not $flow->{Suppress};
+% $v='' if !$col->{Text} && !$v;
+% my $sortkey= $col->{SortColKey} ?
+% $flow->{$col->{SortColKey}} : $v;
+% $ts_sortkeys{$ci}{$rowid}= $sortkey;
+<td <% $spec->{Span} ? "colspan=$spec->{Span}" : ''
+ %> <% $spec->{Align}
+ %>><% exists $spec->{String} ? $spec->{String} : $v |h %>
+% $ci += $spec->{Span};
+% }