Refactoring: rename modules -> pkg

Reasons to change:

1. Shorter than 'modules'
2. More generally used by other Go projects
3. Corresponds to the naming of '$GOPATH/pkg' directory

pkg/context/context.go

@@ -0,0 +1,222 @@
+// Copyright 2014 The Gogs 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 context
+
+import (
+	"fmt"
+	"html/template"
+	"io"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/go-macaron/cache"
+	"github.com/go-macaron/csrf"
+	"github.com/go-macaron/i18n"
+	"github.com/go-macaron/session"
+	log "gopkg.in/clog.v1"
+	"gopkg.in/macaron.v1"
+
+	"github.com/gogits/gogs/models"
+	"github.com/gogits/gogs/pkg/auth"
+	"github.com/gogits/gogs/pkg/base"
+	"github.com/gogits/gogs/pkg/form"
+	"github.com/gogits/gogs/pkg/setting"
+)
+
+// Context represents context of a request.
+type Context struct {
+	*macaron.Context
+	Cache   cache.Cache
+	csrf    csrf.CSRF
+	Flash   *session.Flash
+	Session session.Store
+
+	User        *models.User
+	IsSigned    bool
+	IsBasicAuth bool
+
+	Repo *Repository
+	Org  *Organization
+}
+
+func (ctx *Context) UserID() int64 {
+	if !ctx.IsSigned {
+		return 0
+	}
+	return ctx.User.ID
+}
+
+// HasError returns true if error occurs in form validation.
+func (ctx *Context) HasApiError() bool {
+	hasErr, ok := ctx.Data["HasError"]
+	if !ok {
+		return false
+	}
+	return hasErr.(bool)
+}
+
+func (ctx *Context) GetErrMsg() string {
+	return ctx.Data["ErrorMsg"].(string)
+}
+
+// HasError returns true if error occurs in form validation.
+func (ctx *Context) HasError() bool {
+	hasErr, ok := ctx.Data["HasError"]
+	if !ok {
+		return false
+	}
+	ctx.Flash.ErrorMsg = ctx.Data["ErrorMsg"].(string)
+	ctx.Data["Flash"] = ctx.Flash
+	return hasErr.(bool)
+}
+
+// HasValue returns true if value of given name exists.
+func (ctx *Context) HasValue(name string) bool {
+	_, ok := ctx.Data[name]
+	return ok
+}
+
+// HTML responses template with given status.
+func (ctx *Context) HTML(status int, name base.TplName) {
+	log.Trace("Template: %s", name)
+	ctx.Context.HTML(status, string(name))
+}
+
+// Success responses template with status http.StatusOK.
+func (c *Context) Success(name base.TplName) {
+	c.HTML(http.StatusOK, name)
+}
+
+// RenderWithErr used for page has form validation but need to prompt error to users.
+func (ctx *Context) RenderWithErr(msg string, tpl base.TplName, f interface{}) {
+	if f != nil {
+		form.Assign(f, ctx.Data)
+	}
+	ctx.Flash.ErrorMsg = msg
+	ctx.Data["Flash"] = ctx.Flash
+	ctx.HTML(http.StatusOK, tpl)
+}
+
+// Handle handles and logs error by given status.
+func (ctx *Context) Handle(status int, title string, err error) {
+	switch status {
+	case http.StatusNotFound:
+		ctx.Data["Title"] = "Page Not Found"
+	case http.StatusInternalServerError:
+		ctx.Data["Title"] = "Internal Server Error"
+		log.Error(2, "%s: %v", title, err)
+		if !setting.ProdMode || (ctx.IsSigned && ctx.User.IsAdmin) {
+			ctx.Data["ErrorMsg"] = err
+		}
+	}
+	ctx.HTML(status, base.TplName(fmt.Sprintf("status/%d", status)))
+}
+
+// NotFound renders the 404 page.
+func (ctx *Context) NotFound() {
+	ctx.Handle(http.StatusNotFound, "", nil)
+}
+
+// ServerError renders the 500 page.
+func (c *Context) ServerError(title string, err error) {
+	c.Handle(http.StatusInternalServerError, title, err)
+}
+
+// NotFoundOrServerError use error check function to determine if the error
+// is about not found. It responses with 404 status code for not found error,
+// or error context description for logging purpose of 500 server error.
+func (c *Context) NotFoundOrServerError(title string, errck func(error) bool, err error) {
+	if errck(err) {
+		c.NotFound()
+		return
+	}
+	c.ServerError(title, err)
+}
+
+func (ctx *Context) HandleText(status int, title string) {
+	ctx.PlainText(status, []byte(title))
+}
+
+func (ctx *Context) ServeContent(name string, r io.ReadSeeker, params ...interface{}) {
+	modtime := time.Now()
+	for _, p := range params {
+		switch v := p.(type) {
+		case time.Time:
+			modtime = v
+		}
+	}
+	ctx.Resp.Header().Set("Content-Description", "File Transfer")
+	ctx.Resp.Header().Set("Content-Type", "application/octet-stream")
+	ctx.Resp.Header().Set("Content-Disposition", "attachment; filename="+name)
+	ctx.Resp.Header().Set("Content-Transfer-Encoding", "binary")
+	ctx.Resp.Header().Set("Expires", "0")
+	ctx.Resp.Header().Set("Cache-Control", "must-revalidate")
+	ctx.Resp.Header().Set("Pragma", "public")
+	http.ServeContent(ctx.Resp, ctx.Req.Request, name, modtime, r)
+}
+
+// Contexter initializes a classic context for a request.
+func Contexter() macaron.Handler {
+	return func(c *macaron.Context, l i18n.Locale, cache cache.Cache, sess session.Store, f *session.Flash, x csrf.CSRF) {
+		ctx := &Context{
+			Context: c,
+			Cache:   cache,
+			csrf:    x,
+			Flash:   f,
+			Session: sess,
+			Repo: &Repository{
+				PullRequest: &PullRequest{},
+			},
+			Org: &Organization{},
+		}
+
+		if len(setting.HTTP.AccessControlAllowOrigin) > 0 {
+			ctx.Header().Set("Access-Control-Allow-Origin", setting.HTTP.AccessControlAllowOrigin)
+			ctx.Header().Set("'Access-Control-Allow-Credentials' ", "true")
+			ctx.Header().Set("Access-Control-Max-Age", "3600")
+			ctx.Header().Set("Access-Control-Allow-Headers", "Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With")
+		}
+
+		// Compute current URL for real-time change language.
+		ctx.Data["Link"] = setting.AppSubUrl + strings.TrimSuffix(ctx.Req.URL.Path, "/")
+
+		ctx.Data["PageStartTime"] = time.Now()
+
+		// Get user from session if logined.
+		ctx.User, ctx.IsBasicAuth = auth.SignedInUser(ctx.Context, ctx.Session)
+
+		if ctx.User != nil {
+			ctx.IsSigned = true
+			ctx.Data["IsSigned"] = ctx.IsSigned
+			ctx.Data["SignedUser"] = ctx.User
+			ctx.Data["SignedUserID"] = ctx.User.ID
+			ctx.Data["SignedUserName"] = ctx.User.Name
+			ctx.Data["IsAdmin"] = ctx.User.IsAdmin
+		} else {
+			ctx.Data["SignedUserID"] = 0
+			ctx.Data["SignedUserName"] = ""
+		}
+
+		// If request sends files, parse them here otherwise the Query() can't be parsed and the CsrfToken will be invalid.
+		if ctx.Req.Method == "POST" && strings.Contains(ctx.Req.Header.Get("Content-Type"), "multipart/form-data") {
+			if err := ctx.Req.ParseMultipartForm(setting.AttachmentMaxSize << 20); err != nil && !strings.Contains(err.Error(), "EOF") { // 32MB max size
+				ctx.Handle(500, "ParseMultipartForm", err)
+				return
+			}
+		}
+
+		ctx.Data["CsrfToken"] = x.GetToken()
+		ctx.Data["CsrfTokenHtml"] = template.HTML(`<input type="hidden" name="_csrf" value="` + x.GetToken() + `">`)
+		log.Trace("Session ID: %s", sess.ID())
+		log.Trace("CSRF Token: %v", ctx.Data["CsrfToken"])
+
+		ctx.Data["ShowRegistrationButton"] = setting.Service.ShowRegistrationButton
+		ctx.Data["ShowFooterBranding"] = setting.ShowFooterBranding
+		ctx.Data["ShowFooterVersion"] = setting.ShowFooterVersion
+
+		c.Map(ctx)
+	}
+}