}
};
+my %islandpair;
+# $islandpair{$a,$b}= [ $start_island_ix, $end_island_ix ]
+
+my $specific= !grep { !defined $_ } @islandids;
+my $confusing= 0;
+
foreach my $src_i (0..$#islandids) {
+ my $src_isle= $islandids[$src_i];
my $src_cond= $sd_condition->('sell',$src_i);
my @dst_conds;
foreach my $dst_i ($src_i..$#islandids) {
+ my $dst_isle= $islandids[$dst_i];
my $dst_cond= $sd_condition->('buy',$dst_i);
- if ($dst_i==$src_i and !defined $islandids[$src_i]) {
+ if ($dst_i==$src_i and !defined $src_isle) {
# we always want arbitrage, but mentioning an arch
# once shouldn't produce intra-arch trades
$dst_cond=
"($dst_cond AND sell.islandid = buy.islandid)";
}
push @dst_conds, $dst_cond;
+
+ if ($specific && !$confusing &&
+ # With a circular route, do not carry goods round the loop
+ !($src_i==0 && $dst_i==$#islandids &&
+ $src_isle == $islandids[$dst_i])) {
+ if ($islandpair{$src_isle,$dst_isle}) {
+ $confusing= 1;
+ } else {
+ $islandpair{$src_isle,$dst_isle}=
+ [ $src_i, $dst_i ];
+ }
+ }
}
push @flow_conds, "$src_cond AND (
".join("
}
my $stmt= "
- SELECT commods.commodname commodname,
- commods.commodid commodid,
- commods.unitmass mass,
- commods.unitvolume volume,
- sell_islands.islandid org_id,
- sell_islands.islandname org_name,
- sell.price org_price,
- sum(sell.qty) org_qty,
- buy_islands.islandid dst_id,
- buy_islands.islandname dst_name,
- buy.price dst_price,
- sum(buy.qty) dst_qty
+ SELECT sell_islands.islandname org_name,
+ sell_islands.islandid org_id,
+ sell.price org_price,
+ sum(sell.qty) org_qty,
+ buy_islands.islandname dst_name,
+ buy_islands.islandid dst_id,
+ buy.price dst_price,
+ sum(buy.qty) dst_qty,
+ commods.commodname commodname,
+ commods.commodid commodid,
+ commods.unitmass unitmass,
+ commods.unitvolume unitvolume,
+ buy.price - sell.price unitprofit,
+ min(sell.qty,buy.qty) max_qty,
+ min(sell.qty,buy.qty) * (buy.price-sell.price) max_profit
FROM commods
JOIN buy on commods.commodid = buy.commodid
JOIN sell on commods.commodid = sell.commodid
OR ", @flow_conds)."
)
AND buy.price > sell.price
- GROUP BY commodname, commods.commodid,
- org_id, org_price, dst_id, dst_price
+ GROUP BY commods.commodid, org_id, org_price, dst_id, dst_price
+ ORDER BY org_name, dst_name, max_profit DESC, commodname,
+ org_price, dst_price DESC
";
my $sth= $dbh->prepare($stmt);
$sth->execute(@query_params);
+my @flows;
+
+my @columns= qw(org_name dst_name commodname
+ org_price org_qty dst_price dst_qty
+ max_qty max_profit);
</%perl>
+
% if ($qa->{'debug'}) {
<pre>
<% $stmt |h %>
</pre>
% }
-<& dumpqueryresults, sth =>$sth &>
+% {
+<& dumpqueryresults:start, sth => $sth &>
+% my $flow;
+% while ($flow= $sth->fetchrow_hashref()) {
+% $flow->{Ix}= @flows;
+% $flow->{Var}= "f$flow->{Ix}";
+% push @flows, $flow;
+<& dumpqueryresults:row, sth => $sth, row => $flow &>
+% }
+<& dumpqueryresults:end &>
+% }
+
+% if (!$specific || $confusing || @islandids<=1) {
+
+<p>
+% if (@islandids<=1) {
+Route is trivial.
+% }
+% if (!$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 trade pattern not calculated.
+
+% } else { # ========== OPTMISATION ==========
+<%perl>
+
+my $cplex= "
+Maximize
+
+ totalprofit:
+ ".(join " +
+ ", map { "$_->{unit_profit} $_->{Var}" } @flows)."
+
+Subject To
+";
+
+my %avail_csts;
+foreach my $flow (@flows) {
+ foreach my $od (qw(org dst)) {
+ my $cstname= join '_',
+ 'avail',
+ $flow->{'commodid'},
+ $od,
+ $flow->{"${od}_id"},
+ $flow->{"${od}_price"};
+ push @{ $avail_csts{$cstname}{Flows} }, $flow->{Var};
+ $avail_csts{$cstname}{Qty}= $flow->{"${od}_qty"};
+ }
+}
+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 $found_section= 0;
+ while (<$output>) {
+ 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->{Opt_qty}= $qty;
+ $flow->{Opt_profit}= $flow->{'unitprofit'} * $qty;
+ }
+ print "</pre>\n" if $qa->{'debug'};
+ pipethrough_run_finish($output, 'glpsol');
+ die unless $found_section;
+};
+
+print join ' ', map { $_->{Optimal} } @flows;
+
+push @columns, qw(Opt_qty Opt_profit);
+
+</%perl>
+<% join ' ', @columns %>
+
+% } # ========== OPTIMISATION ==========
<%init>
use CommodsWeb;
+use Commods;
</%init>
~yarrgweb / ypp-sc-tools.web-live.git / blobdiff