+<& 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->{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 (!$optimise) {
+
+<p>
+% if (@islandids<=1) {
+Route is trivial.
+% }
+% if (!$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";
+}
+
+$cplex.= "
+Bounds
+ ".(join "
+ ", map { "$_->{Var} >= 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 }, 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>
+<% $qa->{ShowStalls} ? '<colgroup span=2>' : '' %>
+<colgroup span=1>
+<colgroup span=2>
+<colgroup span=2>
+<colgroup span=2>
+<colgroup span=1>
+<colgroup span=3>
+% if ($optimise) {
+<colgroup span=3>
+% }
+<tr class="spong">
+<th>
+<th<% $cdspan %>>Collect
+<th<% $cdspan %>>Deliver
+<th>
+<th colspan=2>Collect
+<th colspan=2>Deliver
+<th colspan=2>Profit
+<th colspan=1>
+<th colspan=3>Max
+% if ($optimise) {
+<th colspan=3>Planned
+% }
+
+<tr>
+<th>
+<th>Island <% $cdstall %>
+<th>Island <% $cdstall %>
+<th>Commodity
+<th>Price
+<th>Qty
+<th>Price
+<th>Qty
+<th>Margin
+<th>Unit
+<th>Dist
+<th>Qty
+<th>Capital
+<th>Profit
+% if ($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' %> >
+% foreach my $ci (1..$#cols) {
+% my $col= $cols[$ci];
+% my $v= $flow->{$col->{Name}};
+% $col->{Total} += $v if defined $col->{Total};
+% $v='' if !$col->{Text} && !$v;
+% my $sortkey= $col->{SortColKey} ?
+% $flow->{$col->{SortColKey}} : $v;
+% $ts_sortkeys{$ci}{$rowid}= $sortkey;
+<td <% $col->{Text} ? '' : 'align=right' %>><% $v |h %>
+% }
+% }
+<tr id="trades_total">
+<th>
+<th colspan=2>Total
+% foreach my $ci (3..$#cols) {
+% my $col= $cols[$ci];
+<td align=right>
+% if (defined $col->{Total}) {
+<% $col->{Total} |h %>
+% }
+% }
+</table>
+
+<&| tabsort, cols => \@cols, table => 'trades', rowclass => 'datarow',
+ throw => 'trades_sort', tbrow => 'trades_total' &>
+ ts_sortkeys= <% to_json_protecttags(\%ts_sortkeys) %>;
+</&tabsort>
+
+<input type=submit name=update value="Update">
+
+% if ($optimise) { # ========== TRADING PLAN ==========
+%
+% my $iquery= $dbh->prepare('SELECT islandname FROM islands
+% WHERE islandid = ?');
+% my %da_ages;
+% my $total_total= 0;
+% my $total_dist= 0;
+%
+<h1>Voyage trading plan</h1>
+<table rules=groups>
+% foreach my $i (0..$#islandids) {
+<tbody>
+<tr><td colspan=3>
+% $iquery->execute($islandids[$i]);
+% my ($islandname) = $iquery->fetchrow_array();
+% my $this_dist= $distance->($islandids[$i-1],$islandids[$i]);
+% $total_dist += $this_dist;
+% if (!$i) {
+<strong>Start at <% $islandname |h %></strong>
+% } else {
+<strong>Sail to <% $islandname |h %></strong>
+- <% $this_dist |h %> leagues </td>
+% }
+<%perl>
+ my $age_reported= 0;
+ my %flowlists;
+ foreach my $od (qw(org dst)) {
+ foreach my $f (@flows) {
+ next if $f->{Suppress};
+ next unless $f->{"${od}_id"} == $islandids[$i];
+ next unless $f->{OptQty};
+ my $arbitrage= $f->{'org_id'} == $f->{'dst_id'};
+ my $loop= $islandids[0] == $islandids[-1] &&
+ ($i==0 || $i==$#islandids);
+ next if $loop and ($arbitrage ? $i :
+ !!$i == !!($od eq 'org'));
+ my $price= $f->{"${od}_price"};
+ my $stallname= $f->{"${od}_stallname"};
+ my $todo= \$flowlists{$od}{
+ $f->{'commodname'},
+ (sprintf "%07d", ($od eq 'dst' ?
+ 9999999-$price : $price)),
+ $stallname
+ };
+ $$todo= {
+ Qty => 0,
+ orgArbitrage => 0,
+ dstArbitrage => 0,
+ } unless $$todo;
+ $$todo->{'commodname'}= $f->{'commodname'};
+ $$todo->{'stallname'}= $stallname;
+ $$todo->{Price}= $price;
+ $$todo->{Timestamp}= $f->{"${od}_timestamp"};
+ $$todo->{Qty} += $f->{OptQty};
+ $$todo->{Total}= $$todo->{Price} * $$todo->{Qty};
+ $$todo->{Stalls}= $f->{"${od}Stalls"};
+ $$todo->{"${od}Arbitrage"}= 1 if $arbitrage;
+ }
+ }
+
+ my $total;
+ my $dline= 0;
+ my $show_flows= sub {
+ my ($od,$arbitrage,$collectdeliver) = @_;
+</%perl>
+%
+% my $todo= $flowlists{$od};
+% return unless $todo;
+% foreach my $tkey (sort keys %$todo) {
+% my $t= $todo->{$tkey};
+% next if $t->{"${od}Arbitrage"} != $arbitrage;
+% if (!$age_reported++) {
+% my $age= $now - $t->{Timestamp};
+% my $cellid= "da_${i}";
+% $da_ages{$cellid}= $age;
+<td colspan=3>\
+(Data age: <span id="<% $cellid %>"><% prettyprint_age($age) %></span>)
+% } elsif (!defined $total) {
+% $total= 0;
+<tbody>
+% }
+% $total += $t->{Total};
+% my $span= 0 + keys %{ $t->{Stalls} };
+% my $td= "td rowspan=$span";
+<tr class="datarow<% $dline %>">
+<<% $td %>><% $collectdeliver %>
+<<% $td %>><% $t->{'commodname'} |h %>
+%
+% my @stalls= sort keys %{ $t->{Stalls} };
+% my $pstall= sub {
+% my $name= $stalls[$_[0]];
+<td><% $name |h %>
+% };
+%
+% $pstall->(0);
+<<% $td %> align=right><% $t->{Price} |h %> poe ea.
+<<% $td %> align=right><% $t->{Qty} |h %> unit(s)
+<<% $td %> align=right><% $t->{Total} |h %> total
+%
+% foreach my $stallix (1..$#stalls) {
+<tr class="datarow<% $dline %>">
+% $pstall->($stallix);
+% }
+%
+% $dline ^= 1;
+% }
+% };
+% my $show_total= sub {
+% my ($totaldesc, $sign)= @_;
+% if (defined $total) {
+<tr>
+<td colspan=3>
+<td colspan=2 align=right><% $totaldesc %>
+<td align=right><% $total |h %> total
+% $total_total += $sign * $total;
+% }
+% $total= undef;
+% $dline= 0;
+<%perl>
+ };
+
+ $show_flows->('dst',0,'Deliver'); $show_total->('Proceeds',1);
+ $show_flows->('org',1,'Collect'); $show_total->('(Arbitrage) outlay',-1);
+ $show_flows->('dst',1,'Deliver'); $show_total->('(Arbitrage) proceeds',1);
+ $show_flows->('org',0,'Collect'); $show_total->('Outlay',-1);
+
+}
+</%perl>
+<tbody><tr>
+<td colspan=2>Total distance: <% $total_dist %> leagues.
+<td colspan=3 align=right>Overall net cash flow
+<td align=right><strong><%
+ $total_total < 0 ? -$total_total." loss" : $total_total." gain"
+ %></strong>
+</table>
+<& query_age:dataages, id2age => \%da_ages &>
+%
+% } # ========== TRADING PLAN ==========