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app_mp_handler.go
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app_mp_handler.go
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// ThingsConstruction, a code generator for WoT-based models
// Copyright (C) 2017,2018 @aschmidt75
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// This program is dual-licensed. For commercial licensing options, please
// contact the author(s).
//
//
package main
//
// mp = manage properties
//
import (
"encoding/json"
"fmt"
"github.com/gorilla/mux"
"net/http"
"net/url"
"strconv"
"strings"
)
type appManagePropertiesData struct {
AppPageData
Msg string
}
func appManagePropertiesNewPageData(id string) *appManagePropertiesData {
// read data from id
data := &appManagePropertiesData{
AppPageData: AppPageData{
PageData: PageData{
Title: "Manage Properties",
InApp: true,
},
ThingId: id,
},
}
data.SetFeaturesFromConfig()
if !data.IsIdValid() {
return nil
}
if err := data.Deserialize(); err != nil {
Error.Println(err)
return nil
}
data.SetTocInfo()
return data
}
func AppManagePropertiesHandleGet(w http.ResponseWriter, req *http.Request) {
if ServerConfig.Features.App == false {
http.Redirect(w, req, "/", 302)
return
}
// check if id is valid
vars := mux.Vars(req)
id := vars["id"]
data := appManagePropertiesNewPageData(id)
if data == nil {
AppErrorServePage(w, "An error occurred while reading session data. Please try again.", id)
return
}
data.UpdateFeaturesFromContext(req.Context())
appManagePropertiesServePage(w, data)
}
func AppManagePropertiesDataHandleGet(w http.ResponseWriter, req *http.Request) {
if ServerConfig.Features.App == false {
http.Redirect(w, req, "/", 302)
return
}
// check if id is valid
vars := mux.Vars(req)
id := vars["id"]
data := appManagePropertiesNewPageData(id)
if data == nil {
w.WriteHeader(500)
fmt.Fprint(w, "Thing Id is not valid or Error deserializing session data.")
return
}
data.UpdateFeaturesFromContext(req.Context())
b, err := json.Marshal(data.wtd.Properties)
if err != nil {
Error.Println(err)
w.WriteHeader(500)
fmt.Fprint(w, "Error marshaling data")
return
}
w.WriteHeader(200)
w.Header().Set("Content-Type", "application/json; charset=UTF-8")
w.Write(b)
}
func AppManagePropertiesHandlePost(w http.ResponseWriter, req *http.Request) {
if ServerConfig.Features.App == false {
w.WriteHeader(http.StatusNotImplemented)
return
}
err := req.ParseForm()
if err != nil {
w.WriteHeader(http.StatusBadRequest)
fmt.Fprint(w, "There was an error processing your data. Please try again.")
Debug.Printf("Error parsing create thing form: %s\n", err)
}
mpf := req.PostForm
// check if id is valid
vars := mux.Vars(req)
id := vars["id"]
mpfid := mpf.Get("mpfid")
Debug.Printf("got id=%s, mpfid=%s\n", id, mpfid)
if id != mpfid {
w.WriteHeader(http.StatusBadRequest)
fmt.Fprint(w, "An error occurred while processing form data. Please try again.")
return
}
data := appManagePropertiesNewPageData(id)
if data == nil {
w.WriteHeader(http.StatusInternalServerError)
fmt.Fprint(w, "An error occurred while location/reading session data. Please try again.")
return
}
data.UpdateFeaturesFromContext(req.Context())
parsePropertiesFormData(data.wtd, mpf)
// save..
if data.Serialize() != nil {
Error.Println(err)
w.WriteHeader(http.StatusInternalServerError)
fmt.Fprint(w, "An error occurred while writing session data. Please try again.")
return
}
w.WriteHeader(http.StatusOK)
}
// given the form data (mpf), this function parses all properties
// from form and appends these to wtd
func parsePropertiesFormData(wtd *WebThingDescription, mpf url.Values) {
// parse properties
wtd.NewProperties()
for idx := 1; idx < 100; idx++ {
keyStr := fmt.Sprintf("mp_listitem_%d_val", idx)
key := mpf.Get(keyStr)
if key == "" {
break
}
keyArr := strings.Split(key, ";")
Debug.Printf("idx=%d, key=%#v\n", idx, keyArr)
if len(keyArr) < 2 {
// error, we need at least name and type.
Verbose.Printf("Invalid wtd property spec: %s\n", key)
continue
}
keyStr = fmt.Sprintf("mp_listitem_%d_desc", idx)
desc := mpf.Get(keyStr)
switch keyArr[1] {
case "b":
{
wtd.AppendProperty(WebThingProperty{Name: keyArr[0], Type: "Boolean", Description: &desc})
}
case "s":
{
var maxLength *int = nil
if len(keyArr) >= 3 {
if x, err := strconv.Atoi(keyArr[2]); err == nil {
maxLength = new(int)
*maxLength = x
}
}
wtd.AppendProperty(WebThingProperty{Name: keyArr[0], Type: "String", MaxLength: maxLength, Description: &desc})
}
case "i":
{
var minVal *float64 = nil
var maxVal *float64 = nil
if len(keyArr) >= 3 {
if x, err := strconv.Atoi(keyArr[2]); err == nil {
minVal = new(float64)
*minVal = float64(x)
}
}
if len(keyArr) >= 4 {
if x, err := strconv.Atoi(keyArr[3]); err == nil {
maxVal = new(float64)
*maxVal = float64(x)
}
}
wtd.AppendProperty(WebThingProperty{Name: keyArr[0], Type: "Integer", Min: minVal, Max: maxVal, Description: &desc})
}
case "f":
{
var minVal *float64 = nil
var maxVal *float64 = nil
if len(keyArr) >= 3 {
if x, err := strconv.ParseFloat(keyArr[2], 64); err == nil {
minVal = new(float64)
*minVal = x
}
}
if len(keyArr) >= 4 {
if x, err := strconv.ParseFloat(keyArr[3], 64); err == nil {
maxVal = new(float64)
*maxVal = x
}
}
wtd.AppendProperty(WebThingProperty{Name: keyArr[0], Type: "Float", Min: minVal, Max: maxVal, Description: &desc})
}
}
}
}
func appManagePropertiesServePage(w http.ResponseWriter, data *appManagePropertiesData) {
templates, err := NewBasicHtmlTemplateSet("app_mp.html.tpl", "app_mp_script.html.tpl")
if err != nil {
Error.Fatalf("Fatal error creating template set: %s\n", err)
}
err = templates.ExecuteTemplate(w, "root", data)
if err != nil {
Error.Printf("Error executing template: %s\n", err)
w.WriteHeader(500)
fmt.Fprint(w, "There was an internal error.")
}
}