func JsonEncoder(next func(map[string]string) interface{}) func(http.ResponseWriter, *http.Request) {
return func(writer http.ResponseWriter, request *http.Request) {
writer.Header().Set("Content-Type", "application/json")
result := next(Variables(request))
bytes, error := json.Marshal(result)
if error != nil {
log.Warn("encountered error marshelling object for json: %v", error)
}
fmt.Fprint(writer, string(bytes))
}
}
func RegisterObjectClick(variables map[string]string) interface{} {
objectId := variables["object_id"]
userId := variables["X-Clikr-User"]
sceneObject, ok := SceneObjects[objectId]
if !ok {
log.Warn("attempt to register object click with invalid object id: '%v'", objectId)
return []*SceneObject{}
}
log.Debug("user '%v' register click on object '%v:%v'", userId, sceneObject.Name, objectId)
// mark the object as liked for this user, will strength bond between other
// liked objects.
LikeObject(userId, sceneObject)
bonds, ok := Bonds[sceneObject]
if !ok {
log.Debug("no bonds available for object: '%v'", objectId)
return []*SceneObject{}
}
maxSize := 3 // maximum number of recommendations to return
size := int(math.Min(float64(len(bonds)), float64(maxSize)))
out := make([]*SceneObject, size, size)
for i, b := range bonds {
log.Debug("recommending '%v' with bond strength '%v'", b.With.Name, b.Strength)
out[i] = b.With
if i == (maxSize - 1) {
break
}
}
return out
}