Esempio n. 1
0
/**
  Fetch the latest stock quote for a given stock symbol.
*/
func GetQuote(y *yql.YQL, symbol string) (Quote, error) {
	query := yql.BuildQuery([]string{"*"}, []string{quoteTable}, []string{"symbol = \"" + symbol + "\""}, []bool{true})
	r, err := y.Query(query)

	if err != nil {
		return Quote{}, err
	}

	q := Quote{}
	q.Populate((r.Results["quote"]).(map[string]interface{}))

	return q, nil
}
Esempio n. 2
0
/**
  Fetch the latest stock quote for a group of given stock symbols.
*/
func GetQuotes(y *yql.YQL, names []string) ([]Quote, error) {
	symbols := make([]string, len(names))
	for i, s := range names {
		symbols[i] = "symbol = \"" + s + "\""
	}

	query := yql.BuildQuery([]string{"*"}, []string{quoteTable}, symbols, []bool{false})
	r, err := y.Query(query)

	if err != nil {
		return nil, err
	}

	quotes := r.Results["quote"].([]interface{})
	ret := make([]Quote, len(names))
	for i, q := range quotes {
		z := Quote{}
		z.Populate(q.(map[string]interface{}))
		ret[i] = z
	}

	return ret, nil
}
Esempio n. 3
0
/**
  Fetch historical data for a given stock symbol.
*/
func GetHistoricalData(y *yql.YQL, symbol, start, end string) (*StockHistory, error) {
	query := yql.BuildQuery([]string{"*"}, []string{historyTable}, []string{"symbol = \"" + symbol + "\"", "startDate = \"" + start + "\"", "endDate = \"" + end + "\""}, []bool{true})
	r, err := y.Query(query)

	if err != nil {
		return nil, err
	}

	s := new(StockHistory)
	s.Symbol = symbol
	s.StartDate = start
	s.EndDate = end
	h := make([]HistoricalQuote, len(r.Results["quote"].([]interface{})))
	for i, q := range r.Results["quote"].([]interface{}) {
		dayQuote := HistoricalQuote{}
		dayQuote.Populate(q.(map[string]interface{}))

		s.totalClose += dayQuote.Close
		h[i] = dayQuote
	}

	s.History = h
	return s, nil
}