/
mappercore.go
130 lines (105 loc) · 3.9 KB
/
mappercore.go
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package datamapper
import (
"fmt"
"github.com/jinzhu/gorm"
"github.com/t2wu/betterrest/datamapper/hfetcher"
"github.com/t2wu/betterrest/datamapper/service"
"github.com/t2wu/betterrest/hook"
"github.com/t2wu/betterrest/libs/webrender"
"github.com/t2wu/betterrest/mdlutil"
"github.com/t2wu/qry/datatype"
"github.com/t2wu/qry/mdl"
)
// How about AOP?
// https://github.com/gogap/aop
type batchOpJob struct {
serv service.IService
oldmodelObjs []mdl.IModel // use for update (need to load and override for pegged fields)
modelObjs []mdl.IModel // current field value from the user if update, or from the loaded field if delete
fetcher *hfetcher.HandlerFetcher
data *hook.Data
ep *hook.EndPoint
}
func batchOpCore(job batchOpJob,
taskFunc func(db *gorm.DB, who mdlutil.UserIDFetchable, typeString string, modelObj mdl.IModel, id *datatype.UUID, oldModelObj mdl.IModel) (mdl.IModel, error),
) (*MapperRet, *webrender.RetError) {
modelObjs, oldmodelObjs := job.modelObjs, job.oldmodelObjs
fetcher, data, ep := job.fetcher, job.data, job.ep
ms := make([]mdl.IModel, len(modelObjs))
if data.Cargo == nil {
return nil, &webrender.RetError{Error: fmt.Errorf("cargo shouldn't be nil")}
}
// fetch all handlers with before hooks
for _, hdlr := range fetcher.FetchHandlersForOpAndHook(ep.Op, "B") { // FetchHandlersForOpAndHook is stateful, cannot be repeated called
if renderer := hdlr.(hook.IBefore).Before(data, ep); renderer != nil {
return nil, renderer
}
}
// TODO: Could update all at once, then load all at once again
for i, modelObj := range modelObjs {
id := modelObj.GetID()
// m, err := updateOneCore(serv, db, oid, scope, typeString, modelObj, id)
var m mdl.IModel
var err error
if oldmodelObjs == nil {
m, err = taskFunc(data.DB, ep.Who, ep.TypeString, modelObj, id, nil)
} else {
m, err = taskFunc(data.DB, ep.Who, ep.TypeString, modelObj, id, oldmodelObjs[i])
}
if err != nil { // Error is "record not found" when not found
return nil, &webrender.RetError{Error: err}
}
ms[i] = m
}
// fetch all handlers with after hooks
for _, hdlr := range fetcher.FetchHandlersForOpAndHook(ep.Op, "A") {
if renderer := hdlr.(hook.IAfter).After(data, ep); renderer != nil {
return nil, renderer
}
}
return &MapperRet{
Ms: ms,
Fetcher: fetcher,
}, nil
}
// type opJob struct {
// serv service.IService
// oldModelObj mdl.IModel // use for update (need to load and override for pegged fields)
// modelObj mdl.IModel // current field value from the user if update, or from the loaded field if delete
// fetcher *hfetcher.HandlerFetcher
// data *hook.Data
// ep *hook.EndPoint
// }
// func opCore(
// job opJob,
// taskFun func(db *gorm.DB, who mdlutil.UserIDFetchable, typeString string, modelObj mdl.IModel, id *datatype.UUID, oldModelObj mdl.IModel) (mdl.IModel, error),
// ) (*MapperRet, *webrender.RetError) {
// oldModelObj, modelObj := job.oldModelObj, job.modelObj
// fetcher, data, ep := job.fetcher, job.data, job.ep
// if data.Cargo == nil {
// return nil, &webrender.RetError{Error: fmt.Errorf("cargo shouldn't be nil")}
// }
// // fetch all handlers with before hooks
// for _, hdlr := range fetcher.FetchHandlersForOpAndHook(ep.Op, "B") {
// if renderer := hdlr.(hook.IBefore).Before(data, ep); renderer != nil {
// return nil, renderer
// }
// }
// // Now do the task
// id := modelObj.GetID()
// modelObjReloaded, err := taskFun(data.DB, ep.Who, ep.TypeString, modelObj, id, oldModelObj)
// if err != nil {
// return nil, &webrender.RetError{Error: err}
// }
// data.Ms[0] = modelObjReloaded
// // fetch all handlers with after hooks
// for _, hdlr := range fetcher.FetchHandlersForOpAndHook(ep.Op, "A") {
// if renderer := hdlr.(hook.IAfter).After(data, ep); renderer != nil {
// return nil, renderer
// }
// }
// return &MapperRet{
// Ms: []mdl.IModel{modelObjReloaded},
// Fetcher: fetcher,
// }, nil
// }