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ParseDate: encourage DateTime::Format::Flexible to understand more kinds of natural input

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Pragmatic Software 2019-06-08 17:24:50 -07:00
parent 7523fbcede
commit 7824a5e6db
1 changed files with 29 additions and 24 deletions
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53
PBot/Utils/ParseDate.pm
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@ -30,7 +30,7 @@ sub initialize {
sub unconcise {
my ($input) = @_;
my %word = (y => 'years', w => 'weeks', d => 'days', h => 'hours', m => 'minutes', s => 'seconds');
$input =~ s/(\d+)([ywdhms])/"$1 " . $word{lc $2} . ' and '/ige;
$input =~ s/(\d+)([ywdhms])(?![a-z])/"$1 " . $word{lc $2} . ' and '/ige;
$input =~ s/ and $//;
return $input;
}
@ -40,6 +40,10 @@ sub unconcise {
sub parsedate {
my ($self, $input) = @_;
my $override ="";
TRY_AGAIN:
$input = "$override$input" if length $override;
# expand stuff like 7d3h
$input = unconcise($input);
@ -54,10 +58,11 @@ sub parsedate {
$input =~ s/\b(\d+)\s+(am?|pm?)\b/$1$2/; # remove leading spaces from am/pm
$input =~ s/ (\d+)(am?|pm?)\b/ $1:00:00$2/; # convert 3pm to 3:00:00pm
$input =~ s/ (\d+:\d+)(am?|pm?)\b/ $1:00$2/; # convert 4:20pm to 4:20:00pm
$input =~ s/next (jan(?:uary)?|feb(?:ruary)?|mar(?:ch)?|apr(?:il)?|may|june?|july?|aug(?:ust)?|sept(?:ember)?|oct(?:ober)?|nov(?:ember)|dec(?:ember)?) (\d+)(?:st|nd|rd|th)?(.*)/"next $1 and " . ($2 - 1) . " days" . (length $3 ? " and $3" : "")/ie;
# split input on "and" or comma, then we'll add up the results
# this allows us to parse things like "1 hour and 30 minutes"
my @inputs = split /(?:,?\s+and\s+|\s*,\s*)/, $input;
my @inputs = split /(?:,?\s+and\s+|\s*,\s*|\s+at\s+)/, $input;
# adjust timezone to user-override if user provides a timezone
# we won't know if a timezone was provided until it is parsed
@ -69,7 +74,7 @@ sub parsedate {
my $now = DateTime->now(time_zone => $timezone);
my $seconds = 0;
my $from_now_added = 0;
my ($to, $base);
foreach my $input (@inputs) {
return -1 if $input =~ m/forever/i;
@ -82,48 +87,48 @@ sub parsedate {
next;
}
# adjust base
if (defined $to) {
$base = $to->clone;
$base->set_time_zone($timezone);
} else {
$base = $now;
}
# First, attempt to parse as-is...
my $to = eval { return DateTime::Format::Flexible->parse_datetime($input, lang => ['en'], base => $now); };
$to = eval { return DateTime::Format::Flexible->parse_datetime($input, lang => ['en'], base => $base); };
# If there was an error, then append "from now" and attempt to parse as a relative time...
if ($@) {
$from_now_added = 1;
$input .= ' from now';
$to = eval { return DateTime::Format::Flexible->parse_datetime($input, lang => ['en'], base => $now); };
$to = eval { return DateTime::Format::Flexible->parse_datetime($input, lang => ['en'], base => $base); };
# If there's still an error, it's bad input
if ($@) {
$@ =~ s/ from now at PBot.*$//;
$@ =~ s/ ${override}from now at PBot.*$//;
return (0, $@);
}
}
# there was a timezone parsed, set the override and try again
# there was a timezone parsed, set the tz override and try again
if ($to->time_zone_short_name ne 'floating' and $to->time_zone_short_name ne 'UTC' and $tz_override eq 'UTC') {
$tz_override = $to->time_zone_long_name;
goto ADJUST_TIMEZONE;
}
$to->set_time_zone('UTC');
my $duration = $to->subtract_datetime_absolute($now);
$base->set_time_zone('UTC');
my $duration = $to->subtract_datetime_absolute($base);
# If the time is in the past, prepend "tomorrow" and reparse
# If the time is in the past, prepend "tomorrow" or "next" and reparse
if ($duration->is_negative) {
$input = "tomorrow $input";
$to = eval { return DateTime::Format::Flexible->parse_datetime($input, lang => ['en'], base => $now); };
if ($@) {
$@ =~ s/format: tomorrow /format: /;
if ($from_now_added) {
$@ =~ s/ from now at PBot.*//;
} else {
$@ =~ s/ at PBot.*//;
}
return (0, $@);
if ($input =~ m/^\d/) {
$override = "tomorrow ";
} else {
$override = "next ";
}
$to->set_time_zone('UTC');
$duration = $to->subtract_datetime_absolute($now);
$to = undef;
goto TRY_AGAIN;
}
# add the seconds from this input chunk