From 63893587cb41a1980318b60bf05fafbf433a24ab Mon Sep 17 00:00:00 2001
From: Grant Ammons <gammons@gmail.com>
Date: Sun, 24 Apr 2016 10:22:33 -0400
Subject: Organize things a bit better

---
 todolist/parser.go | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 todolist/parser.go

(limited to 'todolist/parser.go')

diff --git a/todolist/parser.go b/todolist/parser.go
new file mode 100644
index 0000000..d3b5968
--- /dev/null
+++ b/todolist/parser.go
@@ -0,0 +1,87 @@
+package todolist
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+	"time"
+
+	"github.com/jinzhu/now"
+)
+
+type Parser struct{}
+
+func (p *Parser) Parse(input string) *Todo {
+	todo := NewTodo()
+	todo.Subject = p.Subject(input)
+	todo.Projects = p.Projects(input)
+	todo.Contexts = p.Contexts(input)
+	if p.hasDue(input) {
+		todo.FormattedDue = p.Due(input)
+	}
+	return todo
+}
+
+func (p *Parser) Subject(input string) string {
+	if strings.Contains(input, " due") {
+		index := strings.LastIndex(input, " due")
+		return input[0:index]
+	} else {
+		return input
+	}
+}
+
+func (p *Parser) Projects(input string) []string {
+	r, _ := regexp.Compile(`\+\w+`)
+	return p.matchWords(input, r)
+}
+
+func (p *Parser) Contexts(input string) []string {
+	r, err := regexp.Compile(`\@\w+`)
+	if err != nil {
+		fmt.Println("regex error", err)
+	}
+	return p.matchWords(input, r)
+}
+
+func (p *Parser) hasDue(input string) bool {
+	r, _ := regexp.Compile(`due \w+$`)
+	return r.MatchString(input)
+}
+
+func (p *Parser) Due(input string) time.Time {
+	r, _ := regexp.Compile(`due .*$`)
+
+	res := r.FindString(input)
+	res = res[4:len(res)]
+	switch {
+	case res == "today":
+		return now.BeginningOfDay()
+	case res == "tomorrow" || res == "tom":
+		return now.BeginningOfDay().AddDate(0, 0, 1)
+	case res == "monday" || res == "mon":
+		n := now.BeginningOfDay()
+		return now.New(n).Monday().AddDate(0, 0, 7)
+	case res == "tuesday" || res == "tue":
+		n := now.BeginningOfDay()
+		return now.New(n).Monday().AddDate(0, 0, 1)
+	case res == "wednesday" || res == "wed":
+		n := now.BeginningOfDay()
+		return now.New(n).Monday().AddDate(0, 0, 2)
+	case res == "next week":
+		n := now.BeginningOfDay()
+		return now.New(n).Monday().AddDate(0, 0, 7)
+	}
+	//return now.Parse(input)
+	return time.Now()
+}
+
+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:len(val)])
+	}
+	return ret
+}
-- 
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