Code reorg according to Go guidelines

lib/google.go

@@ -0,0 +1,83 @@
+// Copyright (c) 2013 by Michael Dvorkin. All Rights Reserved.
+//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
+package mop
+
+import (
+	// "fmt"
+	"bytes"
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+	// "strings"
+)
+
+const real_time_url = "http://finance.google.com/finance/info?client=ig&q="
+
+//     body := `
+// // [
+// {
+// "id": "22144"
+// ,"t" : "AAPL"
+// ,"e" : "NASDAQ"
+// ,"l" : "416.84"
+// ,"l_cur" : "416.84"
+// ,"s": "2"
+// ,"ltt":"4:00PM EDT"
+// ,"lt" : "Jun 20, 4:00PM EDT"
+// ,"c" : "-6.16"
+// ,"cp" : "-1.46"
+// ,"ccol" : "chr"
+// ,"el": "416.74"
+// ,"el_cur": "416.74"
+// ,"elt" : "Jun 20, 7:16PM EDT"
+// ,"ec" : "-0.10"
+// ,"ecp" : "-0.02"
+// ,"eccol" : "chr"
+// ,"div" : "3.05"
+// ,"yld" : "2.93"
+// }
+// ]`
+
+type Message struct {
+	Ticker    string `json:"t"`
+	LastTrade string `json:"l"`
+	Change    string `json:"c"`
+}
+
+func Quote(ticker string) []Message {
+	// Send the request.
+	response, err := http.Get(real_time_url + ticker)
+	if err != nil {
+		panic(err)
+	}
+
+	// Fetch response and get its body.
+	defer response.Body.Close()
+	body, err := ioutil.ReadAll(response.Body)
+
+	// Parse JSON.
+	var message []Message
+	err = json.Unmarshal(sanitize(body), &message)
+	if err != nil {
+		panic(err)
+	}
+	return message
+}
+
+func sanitize(ascii []byte) []byte {
+	return bytes.Replace(ascii, []byte{'/'}, []byte{}, -1)
+}
+
+// func sanitize(str string) string {
+//     r := strings.NewReplacer("//", "", "[", "", "]", "")
+//     fmt.Printf("%s\n", []byte(r.Replace(str)))
+//     return r.Replace(str)
+// }
+//
+// func main() {
+//
+//     message := Quote("coh,atvi,hpq,ibm,xxx")
+//     for _,m := range message {
+//         fmt.Printf("%s, %s, %s\n", m.Ticker, m.LastTrade, m.Change)
+//     }
+// }

mop.go

@@ -0,0 +1,139 @@
+// Copyright (c) 2013 by Michael Dvorkin. All Rights Reserved.
+//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/michaeldv/just"
+	"github.com/michaeldv/mop/lib"
+	"github.com/nsf/termbox-go"
+	"regexp"
+	"strings"
+	"text/template"
+)
+
+// Can combine attributes and a single color using bitwise OR.
+//
+// AttrBold Attribute = 1 << (iota + 4)
+// AttrUnderline
+// AttrReverse
+//
+var colors = map[string]termbox.Attribute{
+	"black":   termbox.ColorBlack,
+	"red":     termbox.ColorRed,
+	"green":   termbox.ColorGreen,
+	"yellow":  termbox.ColorYellow,
+	"blue":    termbox.ColorBlue,
+	"magenta": termbox.ColorMagenta,
+	"cyan":    termbox.ColorCyan,
+	"white":   termbox.ColorWhite,
+}
+
+//
+// Return regular expression that matches all possible color tags, i.e.
+// </?black>|</?red>| ... |</?white>
+//
+func color_tags() *regexp.Regexp {
+	tags := []string{}
+
+	for color, _ := range colors {
+		tags = append(tags, "</?"+color+">")
+	}
+
+	return regexp.MustCompile(strings.Join(tags, "|"))
+}
+
+//
+// Return true if a string looks like a tag.
+//
+func is_tag(str string) (is bool, open bool) {
+	is = (str[0:1] == "<" && str[len(str)-1:] == ">")
+	open = (is && str[1:2] != "/")
+	return
+}
+
+//
+// Extract tag name from the given tag, i.e. "<hello>" => "hello"
+//
+func tag_name(str string) string {
+	if str[1:2] != "/" {
+		return str[1 : len(str)-1]
+	} else {
+		return str[2 : len(str)-1]
+	}
+}
+
+func draw_color_line(x int, y int, str string) {
+	column := 0
+	foreground, background := termbox.ColorDefault, termbox.ColorDefault
+
+	for _, token := range just.Split(color_tags(), str) {
+		if tag, open := is_tag(token); tag {
+			if color, ok := colors[tag_name(token)]; ok {
+				token = ""
+				if open {
+					foreground = color
+				} else {
+					foreground = termbox.ColorDefault
+				}
+			}
+		}
+
+		for _, char := range token {
+			termbox.SetCell(x+column, y, char, foreground, background)
+			column += 1
+		}
+	}
+}
+
+func draw_screen(str string) {
+	termbox.Clear(termbox.ColorDefault, termbox.ColorDefault)
+	for row, line := range strings.Split(str, "\n") {
+		draw_color_line(0, row, line)
+	}
+	termbox.Flush()
+}
+
+func main() {
+	message := mop.Quote("coh,atvi,hpq,ibm,xxx")
+	for _, m := range message {
+		fmt.Printf("%s, %s, %s\n", m.Ticker, m.LastTrade, m.Change)
+	}
+
+	err := termbox.Init()
+	if err != nil {
+		panic(err)
+	}
+	defer termbox.Close()
+
+	markup := `<green>line 1</green>: <white>Hello</white> world
+<green>line 2</green>: <white>Hello</white> again
+<green>line 3</green>: <white>Hello</white> one more time :-)`
+
+	template, err := template.New("screen").Parse(markup)
+	if err != nil {
+		panic(err)
+	}
+
+	buffer := new(bytes.Buffer)
+	err = template.Execute(buffer, nil)
+	if err != nil {
+		panic(err)
+	}
+	draw_screen(buffer.String())
+
+loop:
+	for {
+		switch ev := termbox.PollEvent(); ev.Type {
+		case termbox.EventKey:
+			if ev.Key == termbox.KeyEsc {
+				break loop
+			}
+		case termbox.EventResize:
+			//x, y := termbox.Size()
+			str := fmt.Sprintf("(%d:%d)", ev.Width, ev.Height)
+			draw_screen(str + ": <red>Hello world</red>, how <white>are</white> <blue>you?</blue>")
+		}
+	}
+}