/
handler.go
79 lines (70 loc) · 1.85 KB
/
handler.go
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package main
import (
"emperror.dev/errors"
"encoding/json"
"github.com/bluele/gcache"
"github.com/je4/zsync/v2/pkg/zotero"
"github.com/op/go-logging"
"log"
"net/http"
"strconv"
"time"
)
type Handlers struct {
groups gcache.Cache
cfg *Config
logger *logging.Logger
zot *zotero.Zotero
}
func NewHandler(zot *zotero.Zotero, cfg *Config, logger *logging.Logger) *Handlers {
exp, err := time.ParseDuration(cfg.GroupCacheExpiration)
if err != nil {
log.Fatalf("error parsing expiration: %v", err)
}
handlers := &Handlers{
zot: zot,
cfg: cfg,
logger: logger,
groups: gcache.New(500).
ARC().Expiration(exp).
Build(),
}
return handlers
}
func respondWithError(w http.ResponseWriter, code int, message string) {
respondWithJSON(w, code, map[string]string{"error": message})
}
func respondWithJSON(w http.ResponseWriter, code int, payload interface{}) {
response, _ := json.Marshal(payload)
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(code)
w.Write(response)
}
func (handlers *Handlers) getGroup(groupId int64) (group *zotero.Group, err error) {
tmp, err := handlers.groups.Get(groupId)
if err != nil {
group, err = handlers.zot.LoadGroupLocal(groupId)
if err != nil {
return nil, errors.Wrapf(err, "cannot load group %v", groupId)
}
handlers.groups.Set(groupId, group)
} else {
var ok bool
group, ok = tmp.(*zotero.Group)
if !ok {
return nil, errors.Wrapf(errors.New("invalid type in cache"), "cannot load group %v", groupId)
}
}
return
}
func (handlers *Handlers) groupFromVars(vars map[string]string) (*zotero.Group, error) {
groupidstr, ok := vars["groupid"]
if !ok {
return nil, errors.New("no groupid")
}
groupid, err := strconv.ParseInt(groupidstr, 10, 64)
if err != nil {
return nil, errors.Wrapf(err, "groupid not a number #%v", groupidstr)
}
return handlers.getGroup(groupid)
}