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package todolist
import (
"fmt"
"os"
"regexp"
"strconv"
"strings"
"time"
)
type Parser struct{}
func (p *Parser) ParseNewTodo(input string) *Todo {
r, _ := regexp.Compile(`^(add|a)(\\ |) `)
input = r.ReplaceAllString(input, "")
if input == "" {
return nil
}
todo := NewTodo()
todo.Subject = p.Subject(input)
todo.Projects = p.Projects(input)
todo.Contexts = p.Contexts(input)
if p.hasDue(input) {
todo.Due = p.Due(input, time.Now())
}
return todo
}
func (p *Parser) ParseEditTodo(todo *Todo, input string) bool {
r := regexp.MustCompile(`(\w+)\s+(\d+)(\s+(.*))?`)
matches := r.FindStringSubmatch(input)
if len(matches) < 3 {
fmt.Println("Could not match command or id")
return false
}
subjectOnly := matches[3]
if p.Subject(subjectOnly) != "" {
todo.Subject = p.Subject(subjectOnly)
todo.Projects = p.Projects(subjectOnly)
todo.Contexts = p.Contexts(subjectOnly)
}
if p.hasDue(subjectOnly) {
todo.Due = p.Due(subjectOnly, time.Now())
}
return true
}
func (p *Parser) Subject(input string) string {
if strings.Contains(input, " due") {
index := strings.LastIndex(input, " due")
return strings.TrimSpace(input[0:index])
} else {
return strings.TrimSpace(input)
}
}
func (p *Parser) ExpandProject(input string) string {
r, _ := regexp.Compile(`(ex|expand) +\d+ +\+[\p{L}\d_-]+:`)
pattern := r.FindString(input)
if len(pattern) == 0 {
return ""
}
newProject := pattern[0 : len(pattern)-1]
project := strings.Split(newProject, " ")
return project[len(project)-1]
}
func (p *Parser) Projects(input string) []string {
r, _ := regexp.Compile(`\+[\p{L}\d_-]+`)
return p.matchWords(input, r)
}
func (p *Parser) Contexts(input string) []string {
r, err := regexp.Compile(`\@[\p{L}\d_]+`)
if err != nil {
fmt.Println("regex error", err)
}
return p.matchWords(input, r)
}
func (p *Parser) hasDue(input string) bool {
r1, _ := regexp.Compile(`due \w+$`)
r2, _ := regexp.Compile(`due \w+ \d+$`)
return (r1.MatchString(input) || r2.MatchString(input))
}
func (p *Parser) Due(input string, day time.Time) string {
r, _ := regexp.Compile(`due .*$`)
res := r.FindString(input)
res = res[4:]
switch res {
case "none":
return ""
case "today", "tod":
return bod(time.Now()).Format("2006-01-02")
case "tomorrow", "tom":
return bod(time.Now()).AddDate(0, 0, 1).Format("2006-01-02")
case "monday", "mon":
return p.monday(day)
case "tuesday", "tue":
return p.tuesday(day)
case "wednesday", "wed":
return p.wednesday(day)
case "thursday", "thu":
return p.thursday(day)
case "friday", "fri":
return p.friday(day)
case "saturday", "sat":
return p.saturday(day)
case "sunday", "sun":
return p.sunday(day)
case "last week":
n := bod(time.Now())
return getNearestMonday(n).AddDate(0, 0, -7).Format("2006-01-02")
case "next week":
n := bod(time.Now())
return getNearestMonday(n).AddDate(0, 0, 7).Format("2006-01-02")
}
return p.parseArbitraryDate(res, time.Now())
}
func (p *Parser) parseArbitraryDate(_date string, pivot time.Time) string {
d1 := p.parseArbitraryDateWithYear(_date, pivot.Year())
var diff1 time.Duration
if d1.After(time.Now()) {
diff1 = d1.Sub(pivot)
} else {
diff1 = pivot.Sub(d1)
}
d2 := p.parseArbitraryDateWithYear(_date, pivot.Year()+1)
if d2.Sub(pivot) > diff1 {
return d1.Format("2006-01-02")
} else {
return d2.Format("2006-01-02")
}
}
func (p *Parser) parseArbitraryDateWithYear(_date string, year int) time.Time {
res := strings.Join([]string{_date, strconv.Itoa(year)}, " ")
if date, err := time.Parse("Jan 2 2006", res); err == nil {
return date
}
if date, err := time.Parse("2 Jan 2006", res); err == nil {
return date
}
fmt.Printf("Could not parse the date you gave me: %s\n", _date)
fmt.Println("I'm expecting a date like \"Dec 22\" or \"22 Dec\".")
fmt.Println("See http://todolist.site/#adding for more info.")
os.Exit(-1)
return time.Now()
}
func (p *Parser) monday(day time.Time) string {
mon := getNearestMonday(day)
return p.thisOrNextWeek(mon, day)
}
func (p *Parser) tuesday(day time.Time) string {
tue := getNearestMonday(day).AddDate(0, 0, 1)
return p.thisOrNextWeek(tue, day)
}
func (p *Parser) wednesday(day time.Time) string {
tue := getNearestMonday(day).AddDate(0, 0, 2)
return p.thisOrNextWeek(tue, day)
}
func (p *Parser) thursday(day time.Time) string {
tue := getNearestMonday(day).AddDate(0, 0, 3)
return p.thisOrNextWeek(tue, day)
}
func (p *Parser) friday(day time.Time) string {
tue := getNearestMonday(day).AddDate(0, 0, 4)
return p.thisOrNextWeek(tue, day)
}
func (p *Parser) saturday(day time.Time) string {
tue := getNearestMonday(day).AddDate(0, 0, 5)
return p.thisOrNextWeek(tue, day)
}
func (p *Parser) sunday(day time.Time) string {
tue := getNearestMonday(day).AddDate(0, 0, 6)
return p.thisOrNextWeek(tue, day)
}
func (p *Parser) thisOrNextWeek(day time.Time, pivotDay time.Time) string {
if day.Before(pivotDay) {
return day.AddDate(0, 0, 7).Format("2006-01-02")
} else {
return day.Format("2006-01-02")
}
}
func (p *Parser) matchWords(input string, r *regexp.Regexp) []string {
results := r.FindAllString(input, -1)
ret := []string{}
for _, val := range results {
ret = append(ret, val[1:])
}
return ret
}
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