mirror of
https://gitee.com/johng/gf.git
synced 2024-12-11 00:33:18 +08:00
149 lines
4.2 KiB
Go
149 lines
4.2 KiB
Go
// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
|
|
//
|
|
// This Source Code Form is subject to the terms of the MIT License.
|
|
// If a copy of the MIT was not distributed with this file,
|
|
// You can obtain one at https://github.com/gogf/gf.
|
|
|
|
package gdb
|
|
|
|
import (
|
|
"context"
|
|
"database/sql"
|
|
|
|
"github.com/gogf/gf/v2/text/gstr"
|
|
)
|
|
|
|
type (
|
|
HookFuncSelect func(ctx context.Context, in *HookSelectInput) (result Result, err error)
|
|
HookFuncInsert func(ctx context.Context, in *HookInsertInput) (result sql.Result, err error)
|
|
HookFuncUpdate func(ctx context.Context, in *HookUpdateInput) (result sql.Result, err error)
|
|
HookFuncDelete func(ctx context.Context, in *HookDeleteInput) (result sql.Result, err error)
|
|
)
|
|
|
|
// HookHandler manages all supported hook functions for Model.
|
|
type HookHandler struct {
|
|
Select HookFuncSelect
|
|
Insert HookFuncInsert
|
|
Update HookFuncUpdate
|
|
Delete HookFuncDelete
|
|
}
|
|
|
|
// internalParamHook manages all internal parameters for hook operations.
|
|
// The `internal` obviously means you cannot access these parameters outside this package.
|
|
type internalParamHook struct {
|
|
db DB // Underlying DB object.
|
|
link Link // Connection object from third party sql driver.
|
|
handlerCalled bool // Simple mark for custom handler called, in case of recursive calling.
|
|
removedWhere bool // Removed mark for condition string that was removed `WHERE` prefix.
|
|
}
|
|
|
|
type internalParamHookSelect struct {
|
|
internalParamHook
|
|
handler HookFuncSelect
|
|
}
|
|
|
|
type internalParamHookInsert struct {
|
|
internalParamHook
|
|
handler HookFuncInsert
|
|
}
|
|
|
|
type internalParamHookUpdate struct {
|
|
internalParamHook
|
|
handler HookFuncUpdate
|
|
}
|
|
|
|
type internalParamHookDelete struct {
|
|
internalParamHook
|
|
handler HookFuncDelete
|
|
}
|
|
|
|
// HookSelectInput holds the parameters for select hook operation.
|
|
type HookSelectInput struct {
|
|
internalParamHookSelect
|
|
Table string
|
|
Sql string
|
|
Args []interface{}
|
|
}
|
|
|
|
// HookInsertInput holds the parameters for insert hook operation.
|
|
type HookInsertInput struct {
|
|
internalParamHookInsert
|
|
Table string
|
|
Data List
|
|
Option DoInsertOption
|
|
}
|
|
|
|
// HookUpdateInput holds the parameters for update hook operation.
|
|
type HookUpdateInput struct {
|
|
internalParamHookUpdate
|
|
Table string
|
|
Data interface{} // Data can be type of: map[string]interface{}/string. You can use type assertion on `Data`.
|
|
Condition string
|
|
Args []interface{}
|
|
}
|
|
|
|
// HookDeleteInput holds the parameters for delete hook operation.
|
|
type HookDeleteInput struct {
|
|
internalParamHookDelete
|
|
Table string
|
|
Condition string
|
|
Args []interface{}
|
|
}
|
|
|
|
// Next calls the next hook handler.
|
|
func (h *HookSelectInput) Next(ctx context.Context) (result Result, err error) {
|
|
if h.handler != nil && !h.handlerCalled {
|
|
h.handlerCalled = true
|
|
return h.handler(ctx, h)
|
|
}
|
|
return h.db.DoSelect(ctx, h.link, h.Sql, h.Args...)
|
|
}
|
|
|
|
// Next calls the next hook handler.
|
|
func (h *HookInsertInput) Next(ctx context.Context) (result sql.Result, err error) {
|
|
if h.handler != nil && !h.handlerCalled {
|
|
h.handlerCalled = true
|
|
return h.handler(ctx, h)
|
|
}
|
|
return h.db.DoInsert(ctx, h.link, h.Table, h.Data, h.Option)
|
|
}
|
|
|
|
// Next calls the next hook handler.
|
|
func (h *HookUpdateInput) Next(ctx context.Context) (result sql.Result, err error) {
|
|
if h.handler != nil && !h.handlerCalled {
|
|
h.handlerCalled = true
|
|
if gstr.HasPrefix(h.Condition, " WHERE ") {
|
|
h.removedWhere = true
|
|
h.Condition = gstr.TrimLeftStr(h.Condition, " WHERE ")
|
|
}
|
|
return h.handler(ctx, h)
|
|
}
|
|
if h.removedWhere {
|
|
h.Condition = " WHERE " + h.Condition
|
|
}
|
|
return h.db.DoUpdate(ctx, h.link, h.Table, h.Data, h.Condition, h.Args...)
|
|
}
|
|
|
|
// Next calls the next hook handler.
|
|
func (h *HookDeleteInput) Next(ctx context.Context) (result sql.Result, err error) {
|
|
if h.handler != nil && !h.handlerCalled {
|
|
h.handlerCalled = true
|
|
if gstr.HasPrefix(h.Condition, " WHERE ") {
|
|
h.removedWhere = true
|
|
h.Condition = gstr.TrimLeftStr(h.Condition, " WHERE ")
|
|
}
|
|
return h.handler(ctx, h)
|
|
}
|
|
if h.removedWhere {
|
|
h.Condition = " WHERE " + h.Condition
|
|
}
|
|
return h.db.DoDelete(ctx, h.link, h.Table, h.Condition, h.Args...)
|
|
}
|
|
|
|
// Hook sets the hook functions for current model.
|
|
func (m *Model) Hook(hook HookHandler) *Model {
|
|
model := m.getModel()
|
|
model.hook = hook
|
|
return model
|
|
}
|