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// Package switchcounter is a simple interface to the https://www.switchcounter.science/ API.
package switchcounter
import (
"bytes"
"encoding/json"
"net/http"
"time"
"within.website/x/web"
)
type arg struct {
Command string `json:"command"` // always "switch"
MemberName string `json:"member_name,omitempty"`
}
// Status is the API response.
type Status struct {
Front string `json:"member_name"`
StartedAt time.Time `json:"started_at"`
}
// Validate ensures a HTTP response contains the expected fields.
func Validate(resp *http.Response) error {
if resp.StatusCode == http.StatusOK {
return nil
}
return web.NewError(http.StatusOK, resp)
}
// API is a builder for HTTP requests to interface with Switch Counter.
type API struct {
url string // webhook url
}
func (a API) makeRequestWith(body interface{}) (*http.Request, error) {
env := struct {
Webhook interface{} `json:"webhook"`
}{
Webhook: body,
}
data, err := json.Marshal(env)
if err != nil {
return nil, err
}
req, err := http.NewRequest(http.MethodPost, a.url, bytes.NewBuffer(data))
if err != nil {
return nil, err
}
req.Header.Add("Content-Type", "application/json")
req.Header.Add("Accept", "application/json")
return req, nil
}
// Status returns a request for which systemmate is currently in front.
func (a API) Status() *http.Request {
result, err := a.makeRequestWith(arg{Command: "switch"})
if err != nil {
panic(err)
}
return result
}
// Switch changes the recorded front to the given systemmate.
func (a API) Switch(front string) *http.Request {
result, err := a.makeRequestWith(arg{Command: "switch", MemberName: front})
if err != nil {
panic(err)
}
return result
}
// NewHTTPClient creates a new instance of API over HTTP.
func NewHTTPClient(webhookURL string) API {
return API{
url: webhookURL,
}
}
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