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|
package en
import (
"regexp"
"strings"
"time"
"github.com/olebedev/when/rules"
)
func Weekday(s rules.Strategy) rules.Rule {
overwrite := s == rules.Override
return &rules.F{
RegExp: regexp.MustCompile("(?i)" +
"(?:\\W|^)" +
"(?:on\\s*?)?" +
"(?:(this|last|past|next)\\s*)?" +
"(" + WEEKDAY_OFFSET_PATTERN[3:] + // skip '(?:'
"(?:\\s*(this|last|past|next)\\s*week)?" +
"(?:\\W|$)",
),
Applier: func(m *rules.Match, c *rules.Context, o *rules.Options, ref time.Time) (bool, error) {
_ = overwrite
day := strings.ToLower(strings.TrimSpace(m.Captures[1]))
norm := strings.ToLower(strings.TrimSpace(m.Captures[0] + m.Captures[2]))
if norm == "" {
norm = "next"
}
dayInt, ok := WEEKDAY_OFFSET[day]
if !ok {
return false, nil
}
if c.Duration != 0 && !overwrite {
return false, nil
}
// Switch:
switch {
case strings.Contains(norm, "past") || strings.Contains(norm, "last"):
diff := int(ref.Weekday()) - dayInt
if diff > 0 {
c.Duration = -time.Duration(diff*24) * time.Hour
} else if diff < 0 {
c.Duration = -time.Duration(7+diff) * 24 * time.Hour
} else {
c.Duration = -(7 * 24 * time.Hour)
}
case strings.Contains(norm, "next"):
diff := dayInt - int(ref.Weekday())
if diff > 0 {
c.Duration = time.Duration(diff*24) * time.Hour
} else if diff < 0 {
c.Duration = time.Duration(7+diff) * 24 * time.Hour
} else {
c.Duration = 7 * 24 * time.Hour
}
case strings.Contains(norm, "this"):
if int(ref.Weekday()) < dayInt {
diff := dayInt - int(ref.Weekday())
if diff > 0 {
c.Duration = time.Duration(diff*24) * time.Hour
} else if diff < 0 {
c.Duration = time.Duration(7+diff) * 24 * time.Hour
} else {
c.Duration = 7 * 24 * time.Hour
}
} else if int(ref.Weekday()) > dayInt {
diff := int(ref.Weekday()) - dayInt
if diff > 0 {
c.Duration = -time.Duration(diff*24) * time.Hour
} else if diff < 0 {
c.Duration = -time.Duration(7+diff) * 24 * time.Hour
} else {
c.Duration = -(7 * 24 * time.Hour)
}
}
}
return true, nil
},
}
}
|
