// Generic Read handler for reading multiple objects possibly with a query
func ReadWhere(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Access-Control-Allow-Origin", "*")
w.Header().Set("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept")
vars := mux.Vars(r)
var (
val interface{} // Generic container for the read objecs
err error
)
whereClause := "" //We may build up some sort of WHERE clause for the DB request
args := make([]interface{}, 0) //This WHERE clause would then require some arguments
// Build a URI like representation of the datatype
types := []string{vars["datatype"]}
if childtype, ok := vars["childtype"]; ok {
types = append(types, childtype)
}
// Switch based on that URI like representation and instantiate something in the generic container. Also infer the identifier from the vars and perform validation.
switch strings.Join(types, "/") {
case "items":
items := make([]*data.Item, 0)
val = &items
case "items/comments":
comments := make([]*data.ItemComment, 0)
// Selecting comments is reliant on the item ID
whereClause = "WHERE ItemID=?"
var itemID int64
itemID, err = strconv.ParseInt(vars["key"], 10, 64)
args = append(args, itemID)
val = &comments
case "items/geolocations":
geolocations := make([]*data.Geolocation, 0)
// Selecting geolocations is reliant on the item ID
whereClause = "WHERE ItemID=?"
var itemID int64
itemID, err = strconv.ParseInt(vars["key"], 10, 64)
args = append(args, itemID)
val = &geolocations
case "users":
users := make([]*data.User, 0)
val = &users
case "roles":
roles := make([]*data.Role, 0)
val = &roles
case "taxonomy":
terms := make([]*data.Term, 0)
val = &terms
default:
http.NotFound(w, r)
return
}
if err != nil {
log.Println(err)
http.Error(w, "Malformed key in URI", http.StatusBadRequest)
return
}
// Sadly due to the need to load Term.Count value we must have some custom queries here
switch val.(type) {
case *[]*data.Term:
err = storage.SelectQuery(val, "SELECT t.*, count(r.Term) FROM Terms AS t, TermRelationships AS r WHERE t.Term = r.Term GROUP BY t.Term")
default:
err = storage.SelectWhere(val, whereClause, args...)
}
if err == storage.ErrZeroAffected {
http.Error(w, "No matches for query", http.StatusNotFound)
return
}
if err != nil {
log.Println(err)
http.Error(w, "Select2 Database error, likely due to malformed request", http.StatusInternalServerError)
return
}
// Important. Let's never send salt/hash out
switch v := val.(type) {
case *[]*data.User:
for _, user := range *v {
user.Salt = ""
user.Password = ""
}
}
w.Header().Set("Content-Type", "application/json") // Header are important when GZIP is enabled
// Return the selected objects
encoder := json.NewEncoder(w)
err = encoder.Encode(val)
if err != nil {
log.Println(err)
}
}
// Handle a POST request with an image, phone_id, lat, lng and heading. Return a target heading from the web UI
func MultiUploadHandler(rterDir string, uploadPath string, w http.ResponseWriter, r *http.Request) {
imageFile, header, err := r.FormFile("image")
if err != nil {
return
}
user := new(data.User)
user.Username = r.FormValue("phone_id")
err = storage.Select(user)
if err == storage.ErrZeroAffected {
user.Role = "public"
storage.Insert(user)
// log.Println("upload failed, phone_id invalid:", user.Username)
// http.Error(w, "Invalid credentials.", http.StatusUnauthorized)
// return
} else if err != nil {
log.Println(err)
http.Error(w, "Database error, likely due to malformed request.", http.StatusInternalServerError)
return
}
os.Mkdir(filepath.Join(uploadPath, user.Username), os.ModeDir|0775)
matchingItems := make([]*data.Item, 0)
err = storage.SelectWhere(&matchingItems, "WHERE Type=\"streaming-video-v0\" AND Author=?", user.Username)
exists := true
if err == storage.ErrZeroAffected {
exists = false
} else if err != nil {
log.Println(err)
http.Error(w, "Database error, likely due to malformed request.", http.StatusInternalServerError)
return
}
var item *data.Item
if exists {
item = matchingItems[0]
} else {
item = new(data.Item)
}
item.Author = user.Username
item.Type = "streaming-video-v0"
item.Live = true
item.HasGeo = true
item.HasHeading = true
item.Lat, err = strconv.ParseFloat(r.FormValue("lat"), 64)
if err != nil {
item.HasGeo = false
}
item.Lng, err = strconv.ParseFloat(r.FormValue("lng"), 64)
if err != nil {
item.HasGeo = false
}
item.Heading, err = strconv.ParseFloat(r.FormValue("heading"), 64)
if err != nil {
item.HasHeading = false
}
item.StartTime = time.Now()
item.StopTime = item.StartTime
path := uploadPath
if strings.HasSuffix(header.Filename, ".png") {
path = filepath.Join(path, fmt.Sprintf("%v/%v.png", user.Username, item.StopTime.UnixNano()))
} else if strings.HasSuffix(header.Filename, ".jpg") || strings.HasSuffix(header.Filename, "jpeg") {
path = filepath.Join(path, fmt.Sprintf("%v/%v.jpg", user.Username, item.StopTime.UnixNano()))
}
outputFile, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE, 0664)
if err != nil {
log.Println(err)
http.Error(w, "Error, likely due to malformed request.", http.StatusInternalServerError)
}
defer outputFile.Close()
io.Copy(outputFile, imageFile)
path = path[len(rterDir):]
item.ContentURI = path
item.ThumbnailURI = path
if exists {
storage.Update(item)
} else {
storage.Insert(item)
}
userDirection := new(data.UserDirection)
userDirection.Username = user.Username
err = storage.Select(userDirection)
if err != nil {
log.Println(err)
http.Error(w, "Database error, likely due to malformed request.", http.StatusInternalServerError)
return
}
w.Write([]byte(strconv.FormatFloat(userDirection.Heading, 'f', 6, 64)))
}