75 lines
1.6 KiB
Go
75 lines
1.6 KiB
Go
package http
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import (
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"net/http"
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"net/url"
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"strconv"
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"strings"
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"github.com/kcotugno/tacitus"
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)
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type TradeHandler struct {
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TradeService tacitus.TradeService
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}
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type tradesResponse struct {
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Trades []tacitus.Trade `json:"trades,omitempty"`
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Error string `json:"error,omitempty"`
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}
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func (t *TradeHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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paths := strings.Split(r.URL.Path, "/")
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if len(paths) < 3 || !tacitus.ValidProduct(paths[3]) {
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errorResp(w, tacitus.Error("Invalid product"))
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return
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}
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params := r.URL.Query()
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params.Set("product", paths[3])
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switch r.Method {
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case "GET":
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t.getTrades(w, params)
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default:
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errorResp(w, tacitus.Error("Invalid request"))
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}
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}
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func (t *TradeHandler) getTrades(w http.ResponseWriter, params url.Values) {
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var trades []tacitus.Trade
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var err error
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limit := parseLimit(params.Get("limit"))
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prod := params.Get("product")
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after, _ := strconv.ParseInt(params.Get("after"), 10, 0)
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before, _ := strconv.ParseInt(params.Get("before"), 10, 0)
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if params.Get("after") != "" {
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trades, err = t.TradeService.TradesAfter(prod, int(after), limit)
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} else if params.Get("before") != "" {
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trades, err = t.TradeService.TradesBefore(prod, int(before), limit)
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} else {
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trades, err = t.TradeService.LastTrades(prod, limit)
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}
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if err == nil {
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encodeJson(w, &tradesResponse{Trades: trades})
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} else {
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errorResp(w, tacitus.Error("Invalid request"))
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}
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}
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func parseLimit(limit string) int {
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l, err := strconv.ParseInt(limit, 10, 0)
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if err != nil {
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l = 1000
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}
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if l > 1000 {
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l = 1000
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}
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return int(l)
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}
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