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package api
import (
"context"
"encoding/json"
"errors"
"fmt"
"log"
"net/http"
"strings"
"time"
"github.com/ponzu-cms/ponzu/system/admin/upload"
"github.com/ponzu-cms/ponzu/system/db"
"github.com/ponzu-cms/ponzu/system/item"
)
var ErrNoAuth = errors.New("Auth failed for update request.")
// Updateable accepts or rejects update POST requests to endpoints such as:
// /api/content/update?type=Review&id=1
type Updateable interface {
// AcceptUpdate allows external content update submissions of a specific type
// user.IsValid(req) may be checked in AcceptUpdate to validate the request
AcceptUpdate(http.ResponseWriter, *http.Request) error
}
func updateContentHandler(res http.ResponseWriter, req *http.Request) {
if req.Method != http.MethodPost {
res.WriteHeader(http.StatusMethodNotAllowed)
return
}
err := req.ParseMultipartForm(1024 * 1024 * 4) // maxMemory 4MB
if err != nil {
log.Println("[Update] error:", err)
res.WriteHeader(http.StatusInternalServerError)
return
}
t := req.URL.Query().Get("type")
if t == "" {
res.WriteHeader(http.StatusBadRequest)
return
}
p, found := item.Types[t]
if !found {
log.Println("[Update] attempt to submit unknown type:", t, "from:", req.RemoteAddr)
res.WriteHeader(http.StatusNotFound)
return
}
id := req.URL.Query().Get("id")
if !db.IsValidID(id) {
log.Println("[Update] attempt to submit update with missing or invalid id from:", req.RemoteAddr)
res.WriteHeader(http.StatusBadRequest)
return
}
post := p()
ext, ok := post.(Updateable)
if !ok {
log.Println("[Update] rejected non-updateable type:", t, "from:", req.RemoteAddr)
res.WriteHeader(http.StatusBadRequest)
return
}
ts := fmt.Sprintf("%d", int64(time.Nanosecond)*time.Now().UnixNano()/int64(time.Millisecond))
req.PostForm.Set("timestamp", ts)
req.PostForm.Set("updated", ts)
urlPaths, err := upload.StoreFiles(req)
if err != nil {
log.Println(err)
res.WriteHeader(http.StatusInternalServerError)
return
}
for name, urlPath := range urlPaths {
req.PostForm.Set(name, urlPath)
}
// check for any multi-value fields (ex. checkbox fields)
// and correctly format for db storage. Essentially, we need
// fieldX.0: value1, fieldX.1: value2 => fieldX: []string{value1, value2}
fieldOrderValue := make(map[string]map[string][]string)
ordVal := make(map[string][]string)
for k, v := range req.PostForm {
if strings.Contains(k, ".") {
fo := strings.Split(k, ".")
// put the order and the field value into map
field := string(fo[0])
order := string(fo[1])
fieldOrderValue[field] = ordVal
// orderValue is 0:[?type=Thing&id=1]
orderValue := fieldOrderValue[field]
orderValue[order] = v
fieldOrderValue[field] = orderValue
// discard the post form value with name.N
req.PostForm.Del(k)
}
}
// add/set the key & value to the post form in order
for f, ov := range fieldOrderValue {
for i := 0; i < len(ov); i++ {
position := fmt.Sprintf("%d", i)
fieldValue := ov[position]
if req.PostForm.Get(f) == "" {
for i, fv := range fieldValue {
if i == 0 {
req.PostForm.Set(f, fv)
} else {
req.PostForm.Add(f, fv)
}
}
} else {
for _, fv := range fieldValue {
req.PostForm.Add(f, fv)
}
}
}
}
hook, ok := post.(item.Hookable)
if !ok {
log.Println("[Update] error: Type", t, "does not implement item.Hookable or embed item.Item.")
res.WriteHeader(http.StatusBadRequest)
return
}
err = hook.BeforeAcceptUpdate(res, req)
if err != nil {
log.Println("[Update] error calling BeforeAcceptUpdate:", err)
return
}
err = ext.AcceptUpdate(res, req)
if err != nil {
log.Println("[Update] error calling AcceptUpdate:", err)
if err == ErrNoAuth {
res.WriteHeader(http.StatusUnauthorized)
}
return
}
err = hook.BeforeSave(res, req)
if err != nil {
log.Println("[Update] error calling BeforeSave:", err)
return
}
// set specifier for db bucket in case content is/isn't Trustable
var spec string
_, err = db.SetContent(t+spec+":"+id, req.PostForm)
if err != nil {
log.Println("[Update] error calling SetContent:", err)
res.WriteHeader(http.StatusInternalServerError)
return
}
// set the target in the context so user can get saved value from db in hook
ctx := context.WithValue(req.Context(), "target", fmt.Sprintf("%s:%d", t, id))
req = req.WithContext(ctx)
err = hook.AfterSave(res, req)
if err != nil {
log.Println("[Update] error calling AfterSave:", err)
return
}
err = hook.AfterAcceptUpdate(res, req)
if err != nil {
log.Println("[Update] error calling AfterAcceptUpdate:", err)
return
}
// create JSON response to send data back to client
var data map[string]interface{}
if spec != "" {
spec = strings.TrimPrefix(spec, "__")
data = map[string]interface{}{
"status": spec,
"type": t,
}
} else {
spec = "public"
data = map[string]interface{}{
"id": id,
"status": spec,
"type": t,
}
}
resp := map[string]interface{}{
"data": []map[string]interface{}{
data,
},
}
j, err := json.Marshal(resp)
if err != nil {
log.Println("[Update] error marshalling response to JSON:", err)
res.WriteHeader(http.StatusInternalServerError)
return
}
res.Header().Set("Content-Type", "application/json")
_, err = res.Write(j)
if err != nil {
log.Println("[Update] error writing response:", err)
return
}
}
|
