122 lines
2.4 KiB
Perl
Executable file
122 lines
2.4 KiB
Perl
Executable file
package Travelynx::Model::JourneyStatsCache;
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# Copyright (C) 2020-2023 Daniel Friesel
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#
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# SPDX-License-Identifier: AGPL-3.0-or-later
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use strict;
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use warnings;
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use 5.020;
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use utf8;
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import JSON;
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sub new {
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my ( $class, %opt ) = @_;
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return bless( \%opt, $class );
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}
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sub add {
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my ( $self, %opt ) = @_;
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my $db = $opt{db} // $self->{pg}->db;
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eval {
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$db->insert(
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'journey_stats',
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{
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user_id => $opt{uid},
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year => $opt{year},
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month => $opt{month},
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data => JSON->new->encode( $opt{stats} ),
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}
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);
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};
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if ( my $err = $@ ) {
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if ( $err =~ m{duplicate key value violates unique constraint} ) {
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# If a user opens the same history page several times in
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# short succession, there is a race condition where several
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# Mojolicious workers execute this helper, notice that there is
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# no up-to-date history, compute it, and insert it using the
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# statement above. This will lead to a uniqueness violation
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# in each successive insert. However, this is harmless, and
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# thus ignored.
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}
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else {
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# Otherwise we probably have a problem.
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die($@);
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}
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}
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}
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sub get {
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my ( $self, %opt ) = @_;
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my $db = $opt{db} // $self->{pg}->db;
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my $stats = $db->select(
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'journey_stats',
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['data'],
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{
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user_id => $opt{uid},
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year => $opt{year},
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month => $opt{month}
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}
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)->expand->hash;
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return $stats->{data};
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}
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# Statistics are partitioned by real_departure, which must be provided
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# when calling this function e.g. after journey deletion or editing.
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# If a joureny's real_departure has been edited, this function must be
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# called twice: once with the old and once with the new value.
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sub invalidate {
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my ( $self, %opt ) = @_;
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my $ts = $opt{ts};
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my $db = $opt{db} // $self->{pg}->db;
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my $uid = $opt{uid};
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$db->delete(
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'journey_stats',
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{
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user_id => $uid,
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year => $ts->year,
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month => $ts->month,
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}
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);
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$db->delete(
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'journey_stats',
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{
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user_id => $uid,
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year => $ts->year,
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month => 0,
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}
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);
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}
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sub get_yyyymm_having_stats {
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my ( $self, %opt ) = @_;
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my $uid = $opt{uid};
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my $db = $opt{db} // $self->{pg}->db;
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my $res = $db->select(
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'journey_stats',
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[ 'year', 'month' ],
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{ user_id => $uid },
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{ order_by => { -asc => [ 'year', 'month' ] } }
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);
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my @ret;
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for my $row ( $res->hashes->each ) {
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if ( $row->{month} != 0 ) {
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push( @ret, [ $row->{year}, $row->{month} ] );
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}
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}
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return @ret;
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}
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1;
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