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engine.go
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engine.go
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// Copyright 2019 GoAdmin Core Team. All rights reserved.
// Use of this source code is governed by a Apache-2.0 style
// license that can be found in the LICENSE file.
package engine
import (
"bytes"
"encoding/json"
errors2 "errors"
"fmt"
"github.com/GoAdminGroup/go-admin/modules/language"
"github.com/GoAdminGroup/go-admin/template/icon"
"github.com/GoAdminGroup/go-admin/template/types/action"
template2 "html/template"
"net/http"
"runtime/debug"
"strings"
"github.com/GoAdminGroup/go-admin/adapter"
"github.com/GoAdminGroup/go-admin/context"
"github.com/GoAdminGroup/go-admin/modules/auth"
"github.com/GoAdminGroup/go-admin/modules/config"
"github.com/GoAdminGroup/go-admin/modules/db"
"github.com/GoAdminGroup/go-admin/modules/errors"
"github.com/GoAdminGroup/go-admin/modules/logger"
"github.com/GoAdminGroup/go-admin/modules/menu"
"github.com/GoAdminGroup/go-admin/modules/service"
"github.com/GoAdminGroup/go-admin/modules/system"
"github.com/GoAdminGroup/go-admin/modules/ui"
"github.com/GoAdminGroup/go-admin/plugins"
"github.com/GoAdminGroup/go-admin/plugins/admin"
"github.com/GoAdminGroup/go-admin/plugins/admin/models"
"github.com/GoAdminGroup/go-admin/plugins/admin/modules/response"
"github.com/GoAdminGroup/go-admin/plugins/admin/modules/table"
"github.com/GoAdminGroup/go-admin/template"
"github.com/GoAdminGroup/go-admin/template/types"
)
// Engine is the core component of goAdmin. It has two attributes.
// PluginList is an array of plugin. Adapter is the adapter of
// web framework context and goAdmin context. The relationship of adapter and
// plugin is that the adapter use the plugin which contains routers and
// controller methods to inject into the framework entity and make it work.
type Engine struct {
PluginList []plugins.Plugin
Adapter adapter.WebFrameWork
Services service.List
NavButtons *types.Buttons
config *config.Config
}
// Default return the default engine instance.
func Default() *Engine {
engine = &Engine{
Adapter: defaultAdapter,
Services: service.GetServices(),
NavButtons: new(types.Buttons),
}
return engine
}
// Use enable the adapter.
func (eng *Engine) Use(router interface{}) error {
if eng.Adapter == nil {
panic("adapter is nil, import the default adapter or use AddAdapter method add the adapter")
}
_, exist := eng.FindPluginByName("admin")
if !exist {
eng.PluginList = append(eng.PluginList, admin.NewAdmin())
}
// init site setting
site := models.Site().SetConn(eng.DefaultConnection())
site.Init(eng.config.ToMap())
_ = eng.config.Update(site.AllToMap())
eng.Services.Add("config", config.SrvWithConfig(eng.config))
errors.Init()
if !eng.config.HideConfigCenterEntrance {
*eng.NavButtons = (*eng.NavButtons).AddNavButton(icon.Gear, types.NavBtnSiteName,
action.JumpInNewTab(config.Url("/info/site/edit"),
language.GetWithScope("site setting", "config")))
}
if !eng.config.HideAppInfoEntrance {
*eng.NavButtons = (*eng.NavButtons).AddNavButton(icon.Info, types.NavBtnInfoName,
action.JumpInNewTab(config.Url("/application/info"),
language.GetWithScope("system info", "system")))
}
if !eng.config.HideToolEntrance {
*eng.NavButtons = (*eng.NavButtons).AddNavButton(icon.Wrench, types.NavBtnToolName,
action.JumpInNewTab(config.Url("/info/generate/new"),
language.GetWithScope("tool", "tool")))
}
navButtons = eng.NavButtons
eng.Services.Add(ui.ServiceKey, ui.NewService(eng.NavButtons))
defaultConnection := db.GetConnection(eng.Services)
defaultAdapter.SetConnection(defaultConnection)
eng.Adapter.SetConnection(defaultConnection)
// Initialize plugins
for i := range eng.PluginList {
eng.PluginList[i].InitPlugin(eng.Services)
}
return eng.Adapter.Use(router, eng.PluginList)
}
// AddPlugins add the plugins and initialize them.
func (eng *Engine) AddPlugins(plugs ...plugins.Plugin) *Engine {
if len(plugs) == 0 {
panic("wrong plugins")
}
eng.PluginList = append(eng.PluginList, plugs...)
return eng
}
// FindPluginByName find the register plugin by given name.
func (eng *Engine) FindPluginByName(name string) (plugins.Plugin, bool) {
for _, plug := range eng.PluginList {
if plug.Name() == name {
return plug, true
}
}
return nil, false
}
// AddAuthService customize the auth logic with given callback function.
func (eng *Engine) AddAuthService(processor auth.Processor) *Engine {
eng.Services.Add("auth", auth.NewService(processor))
return eng
}
// ============================
// Config APIs
// ============================
// AddConfig set the global config.
func (eng *Engine) AddConfig(cfg config.Config) *Engine {
return eng.setConfig(cfg).InitDatabase()
}
// setConfig set the config of engine.
func (eng *Engine) setConfig(cfg config.Config) *Engine {
eng.config = config.Set(cfg)
sysCheck, themeCheck := template.CheckRequirements()
if !sysCheck {
panic(fmt.Sprintf("wrong GoAdmin version, theme %s required GoAdmin version are %s",
eng.config.Theme, strings.Join(template.Default().GetRequirements(), ",")))
}
if !themeCheck {
panic(fmt.Sprintf("wrong Theme version, GoAdmin %s required Theme version are %s",
system.Version(), strings.Join(system.RequireThemeVersion()[eng.config.Theme], ",")))
}
return eng
}
// AddConfigFromJSON set the global config from json file.
func (eng *Engine) AddConfigFromJSON(path string) *Engine {
return eng.setConfig(config.ReadFromJson(path)).InitDatabase()
}
// AddConfigFromYAML set the global config from yaml file.
func (eng *Engine) AddConfigFromYAML(path string) *Engine {
return eng.setConfig(config.ReadFromYaml(path)).InitDatabase()
}
// AddConfigFromINI set the global config from ini file.
func (eng *Engine) AddConfigFromINI(path string) *Engine {
return eng.setConfig(config.ReadFromINI(path)).InitDatabase()
}
// InitDatabase initialize all database connection.
func (eng *Engine) InitDatabase() *Engine {
for driver, databaseCfg := range eng.config.Databases.GroupByDriver() {
eng.Services.Add(driver, db.GetConnectionByDriver(driver).InitDB(databaseCfg))
}
if defaultAdapter == nil {
panic("adapter is nil")
}
return eng
}
// AddAdapter add the adapter of engine.
func (eng *Engine) AddAdapter(ada adapter.WebFrameWork) *Engine {
eng.Adapter = ada
defaultAdapter = ada
return eng
}
// defaultAdapter is the default adapter of engine.
var defaultAdapter adapter.WebFrameWork
var engine *Engine
// navButtons is the default buttons in the navigation bar.
var navButtons = new(types.Buttons)
// Register set default adapter of engine.
func Register(ada adapter.WebFrameWork) {
if ada == nil {
panic("adapter is nil")
}
defaultAdapter = ada
}
// User call the User method of defaultAdapter.
func User(ctx interface{}) (models.UserModel, bool) {
return defaultAdapter.User(ctx)
}
// User call the User method of engine adapter.
func (eng *Engine) User(ctx interface{}) (models.UserModel, bool) {
return eng.Adapter.User(ctx)
}
// ============================
// DB Connection APIs
// ============================
// DB return the db connection of given driver.
func (eng *Engine) DB(driver string) db.Connection {
return db.GetConnectionFromService(eng.Services.Get(driver))
}
// DefaultConnection return the default db connection.
func (eng *Engine) DefaultConnection() db.Connection {
return eng.DB(eng.config.Databases.GetDefault().Driver)
}
// MysqlConnection return the mysql db connection of given driver.
func (eng *Engine) MysqlConnection() db.Connection {
return db.GetConnectionFromService(eng.Services.Get(db.DriverMysql))
}
// MssqlConnection return the mssql db connection of given driver.
func (eng *Engine) MssqlConnection() db.Connection {
return db.GetConnectionFromService(eng.Services.Get(db.DriverMssql))
}
// PostgresqlConnection return the postgresql db connection of given driver.
func (eng *Engine) PostgresqlConnection() db.Connection {
return db.GetConnectionFromService(eng.Services.Get(db.DriverPostgresql))
}
// SqliteConnection return the sqlite db connection of given driver.
func (eng *Engine) SqliteConnection() db.Connection {
return db.GetConnectionFromService(eng.Services.Get(db.DriverSqlite))
}
type ConnectionSetter func(db.Connection)
// ResolveConnection resolve the specified driver connection.
func (eng *Engine) ResolveConnection(setter ConnectionSetter, driver string) *Engine {
setter(eng.DB(driver))
return eng
}
// ResolveMysqlConnection resolve the mysql connection.
func (eng *Engine) ResolveMysqlConnection(setter ConnectionSetter) *Engine {
eng.ResolveConnection(setter, db.DriverMysql)
return eng
}
// ResolveMssqlConnection resolve the mssql connection.
func (eng *Engine) ResolveMssqlConnection(setter ConnectionSetter) *Engine {
eng.ResolveConnection(setter, db.DriverMssql)
return eng
}
// ResolveSqliteConnection resolve the sqlite connection.
func (eng *Engine) ResolveSqliteConnection(setter ConnectionSetter) *Engine {
eng.ResolveConnection(setter, db.DriverSqlite)
return eng
}
// ResolvePostgresqlConnection resolve the postgres connection.
func (eng *Engine) ResolvePostgresqlConnection(setter ConnectionSetter) *Engine {
eng.ResolveConnection(setter, db.DriverPostgresql)
return eng
}
type Setter func(*Engine)
// Clone copy a new Engine.
func (eng *Engine) Clone(e *Engine) *Engine {
e = eng
return eng
}
// ClonedBySetter copy a new Engine by a setter callback function.
func (eng *Engine) ClonedBySetter(setter Setter) *Engine {
setter(eng)
return eng
}
func (eng *Engine) deferHandler(conn db.Connection) context.Handler {
return func(ctx *context.Context) {
defer func(ctx *context.Context) {
if user, ok := ctx.UserValue["user"].(models.UserModel); ok {
var input []byte
form := ctx.Request.MultipartForm
if form != nil {
input, _ = json.Marshal((*form).Value)
}
models.OperationLog().SetConn(conn).New(user.Id, ctx.Path(), ctx.Method(), ctx.LocalIP(), string(input))
}
if err := recover(); err != nil {
logger.Error(err)
logger.Error(string(debug.Stack()[:]))
var (
errMsg string
ok bool
e error
)
if errMsg, ok = err.(string); !ok {
if e, ok = err.(error); ok {
errMsg = e.Error()
}
}
if errMsg == "" {
errMsg = "system error"
}
if ctx.WantJSON() {
response.Error(ctx, errMsg)
return
}
eng.errorPanelHTML(ctx, new(bytes.Buffer), errors2.New(errMsg))
}
}(ctx)
ctx.Next()
}
}
// wrapWithAuthMiddleware wrap a auth middleware to the given handler.
func (eng *Engine) wrapWithAuthMiddleware(handler context.Handler) context.Handlers {
conn := db.GetConnection(eng.Services)
return []context.Handler{eng.deferHandler(conn), response.OffLineHandler, auth.Middleware(conn), handler}
}
// wrapWithAuthMiddleware wrap a auth middleware to the given handler.
func (eng *Engine) wrap(handler context.Handler) context.Handlers {
conn := db.GetConnection(eng.Services)
return []context.Handler{eng.deferHandler(conn), response.OffLineHandler, handler}
}
// ============================
// HTML Content Render APIs
// ============================
// AddNavButtons add the nav buttons.
func (eng *Engine) AddNavButtons(title template2.HTML, icon string, action types.Action) *Engine {
btn := types.GetNavButton(title, icon, action)
*eng.NavButtons = append(*eng.NavButtons, btn)
return eng
}
// Content call the Content method of engine adapter.
// If adapter is nil, it will panic.
func (eng *Engine) Content(ctx interface{}, panel types.GetPanelFn) {
if eng.Adapter == nil {
panic("adapter is nil")
}
eng.Adapter.Content(ctx, panel, eng.AdminPlugin().GetAddOperationFn(), *eng.NavButtons...)
}
// Content call the Content method of defaultAdapter.
// If defaultAdapter is nil, it will panic.
func Content(ctx interface{}, panel types.GetPanelFn) {
if defaultAdapter == nil {
panic("adapter is nil")
}
defaultAdapter.Content(ctx, panel, engine.AdminPlugin().GetAddOperationFn(), *navButtons...)
}
// Data inject the route and corresponding handler to the web framework.
func (eng *Engine) Data(method, url string, handler context.Handler, noAuth ...bool) {
if len(noAuth) > 0 && noAuth[0] {
eng.Adapter.AddHandler(method, url, eng.wrap(handler))
} else {
eng.Adapter.AddHandler(method, url, eng.wrapWithAuthMiddleware(handler))
}
}
// HTML inject the route and corresponding handler wrapped by the given function to the web framework.
func (eng *Engine) HTML(method, url string, fn types.GetPanelInfoFn, noAuth ...bool) {
var handler = func(ctx *context.Context) {
panel, err := fn(ctx)
if err != nil {
panel = template.WarningPanel(err.Error())
}
eng.AdminPlugin().GetAddOperationFn()(panel.Callbacks...)
tmpl, tmplName := template.Default().GetTemplate(ctx.IsPjax())
user := auth.Auth(ctx)
buf := new(bytes.Buffer)
hasError := tmpl.ExecuteTemplate(buf, tmplName, types.NewPage(types.NewPageParam{
User: user,
Menu: menu.GetGlobalMenu(user, eng.Adapter.GetConnection()).SetActiveClass(config.URLRemovePrefix(ctx.Path())),
Panel: panel.GetContent(eng.config.IsProductionEnvironment()),
Assets: template.GetComponentAssetImportHTML(),
Buttons: eng.NavButtons.CheckPermission(user),
TmplHeadHTML: template.Default().GetHeadHTML(),
TmplFootJS: template.Default().GetFootJS(),
}))
if hasError != nil {
logger.Error(fmt.Sprintf("error: %s adapter content, ", eng.Adapter.Name()), hasError)
}
ctx.HTMLByte(http.StatusOK, buf.Bytes())
}
if len(noAuth) > 0 && noAuth[0] {
eng.Adapter.AddHandler(method, url, eng.wrap(handler))
} else {
eng.Adapter.AddHandler(method, url, eng.wrapWithAuthMiddleware(handler))
}
}
// HTMLFile inject the route and corresponding handler which returns the panel content of given html file path
// to the web framework.
func (eng *Engine) HTMLFile(method, url, path string, data map[string]interface{}, noAuth ...bool) {
var handler = func(ctx *context.Context) {
cbuf := new(bytes.Buffer)
t, err := template2.ParseFiles(path)
if err != nil {
eng.errorPanelHTML(ctx, cbuf, err)
return
} else {
if err := t.Execute(cbuf, data); err != nil {
eng.errorPanelHTML(ctx, cbuf, err)
return
}
}
tmpl, tmplName := template.Default().GetTemplate(ctx.IsPjax())
user := auth.Auth(ctx)
buf := new(bytes.Buffer)
hasError := tmpl.ExecuteTemplate(buf, tmplName, types.NewPage(types.NewPageParam{
User: user,
Menu: menu.GetGlobalMenu(user, eng.Adapter.GetConnection()).SetActiveClass(eng.config.URLRemovePrefix(ctx.Path())),
Panel: types.Panel{
Content: template.HTML(cbuf.String()),
},
Assets: template.GetComponentAssetImportHTML(),
Buttons: eng.NavButtons.CheckPermission(user),
TmplHeadHTML: template.Default().GetHeadHTML(),
TmplFootJS: template.Default().GetFootJS(),
}))
if hasError != nil {
logger.Error(fmt.Sprintf("error: %s adapter content, ", eng.Adapter.Name()), hasError)
}
ctx.HTMLByte(http.StatusOK, buf.Bytes())
}
if len(noAuth) > 0 && noAuth[0] {
eng.Adapter.AddHandler(method, url, eng.wrap(handler))
} else {
eng.Adapter.AddHandler(method, url, eng.wrapWithAuthMiddleware(handler))
}
}
// HTMLFiles inject the route and corresponding handler which returns the panel content of given html files path
// to the web framework.
func (eng *Engine) HTMLFiles(method, url string, data map[string]interface{}, files ...string) {
eng.Adapter.AddHandler(method, url, eng.wrapWithAuthMiddleware(eng.htmlFilesHandler(data, files...)))
}
// HTMLFilesNoAuth inject the route and corresponding handler which returns the panel content of given html files path
// to the web framework without auth check.
func (eng *Engine) HTMLFilesNoAuth(method, url string, data map[string]interface{}, files ...string) {
eng.Adapter.AddHandler(method, url, eng.wrap(eng.htmlFilesHandler(data, files...)))
}
// HTMLFiles inject the route and corresponding handler which returns the panel content of given html files path
// to the web framework.
func (eng *Engine) htmlFilesHandler(data map[string]interface{}, files ...string) context.Handler {
return func(ctx *context.Context) {
cbuf := new(bytes.Buffer)
t, err := template2.ParseFiles(files...)
if err != nil {
eng.errorPanelHTML(ctx, cbuf, err)
return
} else {
if err := t.Execute(cbuf, data); err != nil {
eng.errorPanelHTML(ctx, cbuf, err)
return
}
}
tmpl, tmplName := template.Default().GetTemplate(ctx.IsPjax())
user := auth.Auth(ctx)
buf := new(bytes.Buffer)
hasError := tmpl.ExecuteTemplate(buf, tmplName, types.NewPage(types.NewPageParam{
User: user,
Menu: menu.GetGlobalMenu(user, eng.Adapter.GetConnection()).SetActiveClass(eng.config.URLRemovePrefix(ctx.Path())),
Panel: types.Panel{
Content: template.HTML(cbuf.String()),
},
Assets: template.GetComponentAssetImportHTML(),
Buttons: eng.NavButtons.CheckPermission(user),
TmplHeadHTML: template.Default().GetHeadHTML(),
TmplFootJS: template.Default().GetFootJS(),
}))
if hasError != nil {
logger.Error(fmt.Sprintf("error: %s adapter content, ", eng.Adapter.Name()), hasError)
}
ctx.HTMLByte(http.StatusOK, buf.Bytes())
}
}
// errorPanelHTML add an error panel html to context response.
func (eng *Engine) errorPanelHTML(ctx *context.Context, buf *bytes.Buffer, err error) {
user := auth.Auth(ctx)
tmpl, tmplName := template.Default().GetTemplate(ctx.IsPjax())
hasError := tmpl.ExecuteTemplate(buf, tmplName, types.NewPage(types.NewPageParam{
User: user,
Menu: menu.GetGlobalMenu(user, eng.Adapter.GetConnection()).SetActiveClass(eng.config.URLRemovePrefix(ctx.Path())),
Panel: template.WarningPanel(err.Error()).GetContent(eng.config.IsProductionEnvironment()),
Assets: template.GetComponentAssetImportHTML(),
Buttons: (*eng.NavButtons).CheckPermission(user),
TmplHeadHTML: template.Default().GetHeadHTML(),
TmplFootJS: template.Default().GetFootJS(),
}))
if hasError != nil {
logger.Error(fmt.Sprintf("error: %s adapter content, ", eng.Adapter.Name()), hasError)
}
ctx.HTMLByte(http.StatusOK, buf.Bytes())
}
// ============================
// Admin Plugin APIs
// ============================
// AddGenerators add the admin generators.
func (eng *Engine) AddGenerators(list ...table.GeneratorList) *Engine {
plug, exist := eng.FindPluginByName("admin")
if exist {
plug.(*admin.Admin).AddGenerators(list...)
return eng
}
eng.PluginList = append(eng.PluginList, admin.NewAdmin(list...))
return eng
}
// AdminPlugin get the admin plugin. if not exist, create one.
func (eng *Engine) AdminPlugin() *admin.Admin {
plug, exist := eng.FindPluginByName("admin")
if exist {
return plug.(*admin.Admin)
}
adm := admin.NewAdmin()
eng.PluginList = append(eng.PluginList, adm)
return adm
}
// SetCaptcha set the captcha config.
func (eng *Engine) SetCaptcha(captcha map[string]string) *Engine {
eng.AdminPlugin().SetCaptcha(captcha)
return eng
}
// SetCaptchaDriver set the captcha config with driver.
func (eng *Engine) SetCaptchaDriver(driver string) *Engine {
eng.AdminPlugin().SetCaptcha(map[string]string{"driver": driver})
return eng
}
// AddGenerator add table model generator.
func (eng *Engine) AddGenerator(key string, g table.Generator) *Engine {
eng.AdminPlugin().AddGenerator(key, g)
return eng
}
// AddGlobalDisplayProcessFn call types.AddGlobalDisplayProcessFn.
func (eng *Engine) AddGlobalDisplayProcessFn(f types.FieldFilterFn) *Engine {
types.AddGlobalDisplayProcessFn(f)
return eng
}
// AddDisplayFilterLimit call types.AddDisplayFilterLimit.
func (eng *Engine) AddDisplayFilterLimit(limit int) *Engine {
types.AddLimit(limit)
return eng
}
// AddDisplayFilterTrimSpace call types.AddDisplayFilterTrimSpace.
func (eng *Engine) AddDisplayFilterTrimSpace() *Engine {
types.AddTrimSpace()
return eng
}
// AddDisplayFilterSubstr call types.AddDisplayFilterSubstr.
func (eng *Engine) AddDisplayFilterSubstr(start int, end int) *Engine {
types.AddSubstr(start, end)
return eng
}
// AddDisplayFilterToTitle call types.AddDisplayFilterToTitle.
func (eng *Engine) AddDisplayFilterToTitle() *Engine {
types.AddToTitle()
return eng
}
// AddDisplayFilterToUpper call types.AddDisplayFilterToUpper.
func (eng *Engine) AddDisplayFilterToUpper() *Engine {
types.AddToUpper()
return eng
}
// AddDisplayFilterToLower call types.AddDisplayFilterToLower.
func (eng *Engine) AddDisplayFilterToLower() *Engine {
types.AddToUpper()
return eng
}
// AddDisplayFilterXssFilter call types.AddDisplayFilterXssFilter.
func (eng *Engine) AddDisplayFilterXssFilter() *Engine {
types.AddXssFilter()
return eng
}
// AddDisplayFilterXssJsFilter call types.AddDisplayFilterXssJsFilter.
func (eng *Engine) AddDisplayFilterXssJsFilter() *Engine {
types.AddXssJsFilter()
return eng
}