Refactored templates and parsing of the market data

lib/layout.go

@@ -47,41 +47,18 @@ func (self *Layout) Initialize() *Layout {
 
 //-----------------------------------------------------------------------------
 func (self *Layout) Market(m *Market) string {
-	markup := `{{.Dow.name}}: `
-	if m.Dow[`change`][0:1] != `-` {
-		markup += `<green>{{.Dow.change}} ({{.Dow.percent}})</> at {{.Dow.latest}}, `
-	} else {
-		markup += `{{.Dow.change}} ({{.Dow.percent}}) at {{.Dow.latest}}, `
-	}
-	markup += `{{.Sp500.name}}: `
-	if m.Sp500[`change`][0:1] != `-` {
-		markup += `<green>{{.Sp500.change}} ({{.Sp500.percent}})</> at {{.Sp500.latest}}, `
-	} else {
-		markup += `{{.Sp500.change}} ({{.Sp500.percent}}) at {{.Sp500.latest}}, `
-	}
-	markup += `{{.Nasdaq.name}}: `
-	if m.Nasdaq[`change`][0:1] != `-` {
-		markup += `<green>{{.Nasdaq.change}} ({{.Nasdaq.percent}})</> at {{.Nasdaq.latest}}`
-	} else {
-		markup += `{{.Nasdaq.change}} ({{.Nasdaq.percent}}) at {{.Nasdaq.latest}}`
-	}
-	markup += "\n"
-	markup += `{{.Advances.name}}: {{.Advances.nyse}} ({{.Advances.nysep}}) on NYSE and {{.Advances.nasdaq}} ({{.Advances.nasdaqp}}) on Nasdaq. `
-	markup += `{{.Declines.name}}: {{.Declines.nyse}} ({{.Declines.nysep}}) on NYSE and {{.Declines.nasdaq}} ({{.Declines.nasdaqp}}) on Nasdaq`
-	if m.IsClosed {
-		markup += `<right>U.S. markets closed</right>`
-	}
-	markup += "\n"
-	markup += `New highs: {{.Highs.nyse}} on NYSE and {{.Highs.nasdaq}} on Nasdaq. `
-	markup += `New lows: {{.Lows.nyse}} on NYSE and {{.Lows.nasdaq}} on Nasdaq.`
+	markup := `{{.Dow.name}}: {{.Dow.change}} ({{.Dow.percent}}) at {{.Dow.latest}}, {{.Sp500.name}}: {{.Sp500.change}} ({{.Sp500.percent}}) at {{.Sp500.latest}}, {{.Nasdaq.name}}: {{.Nasdaq.change}} ({{.Nasdaq.percent}}) at {{.Nasdaq.latest}}
+{{.Advances.name}}: {{.Advances.nyse}} ({{.Advances.nysep}}) on NYSE and {{.Advances.nasdaq}} ({{.Advances.nasdaqp}}) on Nasdaq. {{.Declines.name}}: {{.Declines.nyse}} ({{.Declines.nysep}}) on NYSE and {{.Declines.nasdaq}} ({{.Declines.nasdaqp}}) on Nasdaq {{if .IsClosed}}<right>U.S. markets closed</right>{{end}}
+New highs: {{.Highs.nyse}} on NYSE and {{.Highs.nasdaq}} on Nasdaq. New lows: {{.Lows.nyse}} on NYSE and {{.Lows.nasdaq}} on Nasdaq.`
+
 	template, err := template.New(`market`).Parse(markup)
 	if err != nil {
 		panic(err)
 	}
 
 	buffer := new(bytes.Buffer)
-	err = template.Execute(buffer, m)
-	if err != nil {
+	highlight(m.Dow, m.Sp500, m.Nasdaq)
+	if err = template.Execute(buffer, m); err != nil {
 		panic(err)
 	}
 
@@ -173,6 +150,15 @@ func (self *Layout) prettify(quotes *Quotes) []Stock {
 	return pretty
 }
 
+//-----------------------------------------------------------------------------
+func highlight(collections ...map[string]string) {
+	for _, collection := range collections {
+		if collection[`change`][0:1] != `-` {
+			collection[`change`] = `<green>` + collection[`change`] + `</>`
+		}
+	}
+}
+
 //-----------------------------------------------------------------------------
 func group(stocks []Stock) []Stock {
 	grouped := make([]Stock, len(stocks))

lib/yahoo_market.go

@@ -11,6 +11,7 @@ import (
 )
 
 type Market struct {
+	regex      *regexp.Regexp
 	IsClosed   bool
 	Dow        map[string]string
 	Nasdaq     map[string]string
@@ -34,6 +35,26 @@ func (self *Market) Initialize() *Market {
 	self.Highs      = make(map[string]string)
 	self.Lows       = make(map[string]string)
 
+	const any = `\s*<.+?>`
+	const some = `<.+?`
+	const space = `\s*`
+	const color = `#([08c]{6});">\s*`
+	const price = `([\d\.,]+)`
+	const percent = `\(([\d\.,%]+)\)`
+
+	rules := []string{
+		`(Dow)`, any, price, some, color, price, some, percent, any,
+		`(Nasdaq)`, any, price, some, color, price, some, percent, any,
+		`(S&P 500)`, any, price, some, color, price, some, percent, any,
+		`(Advances)`, any, price, space, percent, any, price, space, percent, any,
+		`(Declines)`, any, price, space, percent, any, price, space, percent, any,
+		`(Unchanged)`, any, price, space, percent, any, price, space, percent, any,
+		`(New Hi's)`, any, price, any, price, any,
+		`(New Lo's)`, any, price, any, price, any,
+	}
+
+	self.regex = regexp.MustCompile(strings.Join(rules, ``))
+
 	return self
 }
 
@@ -83,26 +104,7 @@ func (self *Market) trim(body []byte) []byte {
 
 //-----------------------------------------------------------------------------
 func (self *Market) extract(snippet []byte) *Market {
-	const any = `\s*<.+?>`
-	const some = `<.+?`
-	const space = `\s*`
-	const color = `#([08c]{6});">\s*`
-	const price = `([\d\.,]+)`
-	const percent = `\(([\d\.,%]+)\)`
-
-	regex := []string{
-		`(Dow)`, any, price, some, color, price, some, percent, any,
-		`(Nasdaq)`, any, price, some, color, price, some, percent, any,
-		`(S&P 500)`, any, price, some, color, price, some, percent, any,
-		`(Advances)`, any, price, space, percent, any, price, space, percent, any,
-		`(Declines)`, any, price, space, percent, any, price, space, percent, any,
-		`(Unchanged)`, any, price, space, percent, any, price, space, percent, any,
-		`(New Hi's)`, any, price, any, price, any,
-		`(New Lo's)`, any, price, any, price, any,
-	}
-
-	re := regexp.MustCompile(strings.Join(regex, ``))
-	matches := re.FindAllStringSubmatch(string(snippet), -1)
+	matches := self.regex.FindAllStringSubmatch(string(snippet), -1)
 
 	// if len(matches) > 0 {
 	//         fmt.Printf("%d matches\n", len(matches[0]))
@@ -113,7 +115,6 @@ func (self *Market) extract(snippet []byte) *Market {
 	//         println(`No matches`)
 	// }
 
-
 	self.Dow[`name`] = matches[0][1]
 	self.Dow[`latest`] = matches[0][2]
 	self.Dow[`change`] = matches[0][4]