Refactor routers directory (#15800)

* refactor routers directory

* move func used for web and api to common

* make corsHandler a function to prohibit side efects

* rm unused func

Co-authored-by: 6543 <6543@obermui.de>

routers/web/home.go

@@ -0,0 +1,65 @@
+// Copyright 2014 The Gogs Authors. All rights reserved.
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package web
+
+import (
+	"net/http"
+
+	"code.gitea.io/gitea/modules/base"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/web/middleware"
+	"code.gitea.io/gitea/routers/web/user"
+)
+
+const (
+	// tplHome home page template
+	tplHome base.TplName = "home"
+)
+
+// Home render home page
+func Home(ctx *context.Context) {
+	if ctx.IsSigned {
+		if !ctx.User.IsActive && setting.Service.RegisterEmailConfirm {
+			ctx.Data["Title"] = ctx.Tr("auth.active_your_account")
+			ctx.HTML(http.StatusOK, user.TplActivate)
+		} else if !ctx.User.IsActive || ctx.User.ProhibitLogin {
+			log.Info("Failed authentication attempt for %s from %s", ctx.User.Name, ctx.RemoteAddr())
+			ctx.Data["Title"] = ctx.Tr("auth.prohibit_login")
+			ctx.HTML(http.StatusOK, "user/auth/prohibit_login")
+		} else if ctx.User.MustChangePassword {
+			ctx.Data["Title"] = ctx.Tr("auth.must_change_password")
+			ctx.Data["ChangePasscodeLink"] = setting.AppSubURL + "/user/change_password"
+			middleware.SetRedirectToCookie(ctx.Resp, setting.AppSubURL+ctx.Req.URL.RequestURI())
+			ctx.Redirect(setting.AppSubURL + "/user/settings/change_password")
+		} else {
+			user.Dashboard(ctx)
+		}
+		return
+		// Check non-logged users landing page.
+	} else if setting.LandingPageURL != setting.LandingPageHome {
+		ctx.Redirect(setting.AppSubURL + string(setting.LandingPageURL))
+		return
+	}
+
+	// Check auto-login.
+	uname := ctx.GetCookie(setting.CookieUserName)
+	if len(uname) != 0 {
+		ctx.Redirect(setting.AppSubURL + "/user/login")
+		return
+	}
+
+	ctx.Data["PageIsHome"] = true
+	ctx.Data["IsRepoIndexerEnabled"] = setting.Indexer.RepoIndexerEnabled
+	ctx.HTML(http.StatusOK, tplHome)
+}
+
+// NotFound render 404 page
+func NotFound(ctx *context.Context) {
+	ctx.Data["Title"] = "Page Not Found"
+	ctx.NotFound("home.NotFound", nil)
+}