/**
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
}
/**
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
}
/**
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
}