func ExerciseHistoryHandler(mapper *pgmapper.Mapper, extractor idextractor.Extractor) http.Handler {
handlerFunc := func(w http.ResponseWriter, r *http.Request) int {
pr, err := paginator.ParsePages(r.URL)
if err != nil {
return http.StatusInternalServerError
}
id, err := extractor(r)
if err != nil {
return http.StatusInternalServerError
}
limit := pr.Size
skip := pr.Size * pr.Number
if pr.Number == -1 || pr.Size == -1 {
skip = -1
}
var result []byte
if ids, ok := r.URL.Query()["module_id"]; ok {
result, err = mapper.PreparedQueryIntoBytes("SELECT get_exercise_history(%v)", id, limit, skip, ids[0])
} else {
result, err = mapper.PreparedQueryIntoBytes("SELECT get_exercise_history(%v)", id, limit, skip)
}
if err != nil {
return http.StatusNotFound
}
reader := bytes.NewReader(result)
_, err = io.Copy(w, reader)
if err != nil {
log.Println(err)
}
return -1
}
return createHandler(handlerFunc)
}
func HintHistoryHandler(mapper *pgmapper.Mapper, extractor idextractor.Extractor) http.Handler {
handlerFunc := func(w http.ResponseWriter, r *http.Request) int {
pr, err := paginator.ParsePages(r.URL)
if err != nil {
return http.StatusInternalServerError
}
id, err := extractor(r)
if err != nil {
return http.StatusInternalServerError
}
var result []byte
ids, ok := r.URL.Query()["exercise_id"]
if ok {
result, err = mapper.PreparedQueryIntoBytes("SELECT get_hint_purchase_history(%v)", id, pr.Size, pr.Size*pr.Number, ids[0])
} else {
result, err = mapper.PreparedQueryIntoBytes("SELECT get_hint_purchase_history(%v)", id, pr.Size, pr.Size*pr.Number)
}
if err != nil {
log.Println(err)
return http.StatusNotFound
}
reader := bytes.NewReader(result)
_, err = io.Copy(w, reader)
if err != nil {
log.Println(err)
}
return -1
}
return createHandler(handlerFunc)
}
func TopicCollectionHandler(mapper *pgmapper.Mapper) http.Handler {
handlerFunc := func(w http.ResponseWriter, r *http.Request) int {
pageRequest, err := paginator.ParsePages(r.URL)
if err != nil {
return http.StatusInternalServerError
}
result, err := mapper.PreparedQueryIntoBytes(`SELECT * from query_topics($1,$2)`, pageRequest.Number*pageRequest.Size, pageRequest.Size)
if err != nil {
log.Println(err)
return http.StatusInternalServerError
}
reader := bytes.NewReader(result)
_, err = io.Copy(w, reader)
if err != nil {
log.Println(err)
}
return -1
}
return createHandler(handlerFunc)
}
