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App-fiatx-0.008
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/ App::fiatx

NAME

App::fiatx - Fiat currency exchange rate tool

VERSION

This document describes version 0.008 of App::fiatx (from Perl distribution App-fiatx), released on 2021-05-26.

SYNOPSIS

See the included script fiatx.

FUNCTIONS

fiatx

Usage:

fiatx(%args) -> [$status_code, $reason, $payload, \%result_meta]

Currency exchange rate tool.

This function is not exported.

Arguments ('*' denotes required arguments):

  • action => str (default: "get_spot_rates")

  • db_name => str

  • db_password => str

  • db_username => str

  • default_quote_currency => fiat_or_cryptocurrency

  • max_age_cache => nonnegint (default: 14400)

    Above this age (in seconds), we retrieve rate from remote source again.

  • query => str

  • sources => array[str]

Returns an enveloped result (an array).

First element ($status_code) is an integer containing HTTP-like status code (200 means OK, 4xx caller error, 5xx function error). Second element ($reason) is a string containing error message, or something like "OK" if status is 200. Third element ($payload) is the actual result, but usually not present when enveloped result is an error response ($status_code is not 2xx). Fourth element (%result_meta) is called result metadata and is optional, a hash that contains extra information, much like how HTTP response headers provide additional metadata.

Return value: (any)

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/App-fiatx.

SOURCE

Source repository is at https://github.com/perlancar/perl-App-fiatx.

BUGS

Please report any bugs or feature requests on the bugtracker website https://github.com/perlancar/perl-App-fiatx/issues

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

SEE ALSO

Finance::Currency::FiatX

          my @rows;
  my $resmeta = {};

  if ($args{per_type}) {
      for (@$rows0) {
          delete $_->{source} unless $source eq ':all';
          push @rows, $_;
      }
      $resmeta->{'table.fields'}        = ['source', 'pair', 'type' , 'rate' , 'note'];
      $resmeta->{'table.field_formats'} = [undef   , undef , undef  , $fnum8 , undef ];
      $resmeta->{'table.field_aligns'}  = ['left'  , 'left', 'right', 'right', 'left'];
      unless ($source eq ':all') {
          shift @{ $resmeta->{'table.fields'} };
          shift @{ $resmeta->{'table.field_formats'} };
          shift @{ $resmeta->{'table.field_aligns'} };
      }
  } else {
      my %sources;
      for my $r (@$rows0) {
          my $src = $r->{source} // '';
          $sources{ $src }++;
      }

      for my $src (sort keys %sources) {
          my %per_pair_rates;
          for my $r (@$rows0) {
              next unless ($r->{source} // '') eq $src;
              $per_pair_rates{ $r->{pair} } //= {
                  pair => $r->{pair},
                  mtime => 0,
              };
              $per_pair_rates{ $r->{pair} }{source} = $src
                  unless $source eq $src;
              next unless $r->{type} =~ /^(buy|sell)/;
              $per_pair_rates{ $r->{pair} }{ $r->{type} } = $r->{rate};
              $per_pair_rates{ $r->{pair} }{mtime} = $r->{mtime}
                  if $per_pair_rates{ $r->{pair} }{mtime} < $r->{mtime};
          }
          for my $pair (sort keys %per_pair_rates) {
              push @rows, $per_pair_rates{$pair};
          }
      }
      $resmeta->{'table.fields'}        = ['source', 'pair', 'buy'  , 'sell' , 'mtime'           ];
      $resmeta->{'table.field_formats'} = [undef   , undef , $fnum8 , $fnum8 , 'iso8601_datetime'];
      $resmeta->{'table.field_aligns'}  = ['left'  , 'left', 'right', 'right', 'left'];
      if ($source =~ /\A\w+\z/) {
          shift @{ $resmeta->{'table.fields'} };
          shift @{ $resmeta->{'table.field_formats'} };
          shift @{ $resmeta->{'table.field_aligns'} };
      }
      $resmeta->{'table.field_align_code'}  = sub { $_[0] =~ /^(buy|sell)/ ? 'right' : undef },
      $resmeta->{'table.field_format_code'} = sub { $_[0] =~ /^(buy|sell)/ ? $fnum8  : undef },
  }

FILTER_ROWS:
  {
      my @rows_f;
      for (@rows) {
          next if $pair && $_->{pair} ne $pair;
          push @rows_f, $_;
      }
      @rows = @rows_f;
  }

  [200, "OK", \@rows, $resmeta];

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2021, 2018 by perlancar@cpan.org.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.