// renderTemplate is a wrapper around template.ExecuteTemplate. It writes into
// a bytes.Buffer before writing to the http.ResponseWriter to catch any errors
// resulting from populating the template.
func renderTemplate(ctx context.Context, w http.ResponseWriter, name string, data map[string]interface{}) error {
// Ensure the template exists in the map.
tmpl, ok := templatesMap[name]
if !ok {
log.FromContext(ctx).WithField("name", name).Error("template does not exist")
return fmt.Errorf("The template %s does not exist", name)
}
// Create a buffer to temporarily write to and check if any errors were encounted.
buf := bufpool.Get()
defer bufpool.Put(buf)
err := tmpl.ExecuteTemplate(buf, "base", data)
if err != nil {
log.FromContext(ctx).WithField("err", err).Error("could not render template")
return err
}
// Set the header and write the buffer to the http.ResponseWriter
w.Header().Set("Content-Type", "text/html; charset=utf-8")
buf.WriteTo(w)
return nil
}
// ListPeople accepts a request to retrieve a list of people.
//
// GET /api/people
//
func ListPeople(c web.C, w http.ResponseWriter, r *http.Request) {
var (
ctx = context.FromC(c)
limit = handler.ToLimit(r)
offset = handler.ToOffset(r)
)
people, err := datastore.ListPeople(ctx, limit, offset)
if err != nil {
log.FromContext(ctx).WithField("err", err).Error("Error listing people")
w.WriteHeader(http.StatusNotFound)
return
}
json.NewEncoder(w).Encode(people)
}
// ListPeople shows a list of all people
//
// GET /people
//
func ListPeople(c web.C, w http.ResponseWriter, r *http.Request) {
var (
ctx = context.FromC(c)
limit = handler.ToLimit(r)
offset = handler.ToOffset(r)
)
people, err := datastore.ListPeople(ctx, limit, offset)
if err != nil {
log.FromContext(ctx).WithField("err", err).Error("Error listing people")
w.WriteHeader(http.StatusNotFound)
return
}
renderTemplate(ctx, w, "person_list.tmpl", M{
"People": people,
})
}
// DeletePerson accepts a request to delete a person.
//
// DELETE /api/people/:person
//
func DeletePerson(c web.C, w http.ResponseWriter, r *http.Request) {
var (
ctx = context.FromC(c)
idStr = c.URLParams["person"]
)
id, err := strconv.ParseInt(idStr, 10, 64)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
return
}
err = datastore.DeletePerson(ctx, id)
if err != nil {
log.FromContext(ctx).WithField("err", err).Error("Error deleting person")
w.WriteHeader(http.StatusNotFound)
return
}
w.WriteHeader(http.StatusNoContent)
}
// GetPerson accepts a request to retrieve information about a particular person.
//
// GET /api/people/:person
//
func GetPerson(c web.C, w http.ResponseWriter, r *http.Request) {
var (
ctx = context.FromC(c)
idStr = c.URLParams["person"]
)
id, err := strconv.ParseInt(idStr, 10, 64)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
return
}
person, err := datastore.GetPerson(ctx, id)
if err != nil {
log.FromContext(ctx).WithField("err", err).Error("Error getting person")
w.WriteHeader(http.StatusNotFound)
return
}
json.NewEncoder(w).Encode(person)
}