Merge pull request #89 from adambhayes/fix-filters

Fix filters

filter.go

@@ -4,7 +4,10 @@
 
 package mop
 
-import "strings"
+import (
+	"strings"
+	"strconv"
+)
 
 // Filter gets called to sort stock quotes by one of the columns. The
 // setup is rather lengthy; there should probably be more concise way
@@ -20,32 +23,47 @@ func NewFilter(profile *Profile) *Filter {
 	}
 }
 
+// Changes money and % notation to a plain float for math, comparisons.
+func stringToNumber (numberString string) float64 {
+	// If the string "$3.6B" is passed in, the returned float will be 3.6E+09.
+	// If 0.03% is passed in, the returned float will be 0.03 (NOT 0.0003!).
+	newString := strings.TrimSpace(numberString) // Take off whitespace.
+	newString = strings.Replace(newString,"$","",1)      // Remove the $ symbol.
+	newString = strings.Replace(newString,"%","",1)      // Remove the $ symbol.
+	newString = strings.Replace(newString,"K","E+3",1)   // Thousand (kilo)
+	newString = strings.Replace(newString,"M","E+6",1)   // Million
+	newString = strings.Replace(newString,"B","E+9",1)   // Billion
+	newString = strings.Replace(newString,"T","E+12",1)  // Trillion
+	finalValue, _ := strconv.ParseFloat(newString, 64)
+	return finalValue
+}
+
 // Apply builds a list of sort interface based on current sort
 // order, then calls sort.Sort to do the actual job.
 func (filter *Filter) Apply(stocks []Stock) []Stock {
 	var filteredStocks []Stock
 
 	for _, stock := range stocks {
-		var values = map[string]interface{}{
+		var values = make(map[string]interface{})
-			"ticker":        strings.TrimSpace(stock.Ticker),
+		// Make conversions from the strings to floats where necessary.
-			"last":          m(stock.LastTrade),
+		values["ticker"]        = strings.TrimSpace(stock.Ticker) // Remains string
-			"change":        c(stock.Change),
+		values["last"]          = stringToNumber(stock.LastTrade)
-			"changePercent": c(stock.ChangePct),
+		values["change"]        = stringToNumber(stock.Change)
-			"open":          m(stock.Open),
+		values["changePercent"] = stringToNumber(stock.ChangePct)
-			"low":           m(stock.Low),
+		values["open"]          = stringToNumber(stock.Open)
-			"high":          m(stock.High),
+		values["low"]           = stringToNumber(stock.Low)
-			"low52":         m(stock.Low52),
+		values["high"]          = stringToNumber(stock.High)
-			"high52":        m(stock.High52),
+		values["low52"]         = stringToNumber(stock.Low52)
-			"volume":        m(stock.Volume),
+		values["high52"]        = stringToNumber(stock.High52)
-			"avgVolume":     m(stock.AvgVolume),
+		values["dividend"]      = stringToNumber(stock.Dividend)
-			"pe":            m(stock.PeRatio),
+		values["yield"]         = stringToNumber(stock.Yield)
-			"peX":           m(stock.PeRatioX),
+		values["mktCap"]        = stringToNumber(stock.MarketCap)
-			"dividend":      m(stock.Dividend),
+		values["mktCapX"]       = stringToNumber(stock.MarketCapX)
-			"yield":         m(stock.Yield),
+		values["volume"]        = stringToNumber(stock.Volume)
-			"mktCap":        m(stock.MarketCap),
+		values["avgVolume"]     = stringToNumber(stock.AvgVolume)
-			"mktCapX":       m(stock.MarketCapX),
+		values["pe"]            = stringToNumber(stock.PeRatio)
-			"advancing":     stock.Advancing,
+		values["peX"]           = stringToNumber(stock.PeRatioX)
-		}
+		values["advancing"]     = stock.Advancing                 // Remains bool.
 
 		result, err := filter.profile.filterExpression.Evaluate(values)