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mycorrhiza/web/mutators.go
2021-05-11 13:33:00 +05:00

248 lines
6.4 KiB
Go

package web
import (
"fmt"
"log"
"net/http"
"github.com/bouncepaw/mycorrhiza/history"
"github.com/bouncepaw/mycorrhiza/hyphae"
"github.com/bouncepaw/mycorrhiza/markup"
"github.com/bouncepaw/mycorrhiza/shroom"
"github.com/bouncepaw/mycorrhiza/user"
"github.com/bouncepaw/mycorrhiza/util"
"github.com/bouncepaw/mycorrhiza/views"
)
func initMutators() {
// Those that do not actually mutate anything:
http.HandleFunc("/edit/", handlerEdit)
http.HandleFunc("/delete-ask/", handlerDeleteAsk)
http.HandleFunc("/rename-ask/", handlerRenameAsk)
http.HandleFunc("/unattach-ask/", handlerUnattachAsk)
// And those that do mutate something:
http.HandleFunc("/upload-binary/", handlerUploadBinary)
http.HandleFunc("/upload-text/", handlerUploadText)
http.HandleFunc("/delete-confirm/", handlerDeleteConfirm)
http.HandleFunc("/rename-confirm/", handlerRenameConfirm)
http.HandleFunc("/unattach-confirm/", handlerUnattachConfirm)
}
func factoryHandlerAsker(
actionPath string,
asker func(*user.User, *hyphae.Hypha) (error, string),
succTitleTemplate string,
succPageTemplate func(*http.Request, string, bool) string,
) func(http.ResponseWriter, *http.Request) {
return func(w http.ResponseWriter, rq *http.Request) {
util.PrepareRq(rq)
var (
hyphaName = util.HyphaNameFromRq(rq, actionPath)
h = hyphae.ByName(hyphaName)
u = user.FromRequest(rq)
)
if err, errtitle := asker(u, h); err != nil {
httpErr(
w,
http.StatusInternalServerError,
hyphaName,
errtitle,
err.Error())
return
}
util.HTTP200Page(
w,
views.BaseHTML(
fmt.Sprintf(succTitleTemplate, hyphaName),
succPageTemplate(rq, hyphaName, h.Exists),
u))
}
}
var handlerUnattachAsk = factoryHandlerAsker(
"unattach-ask",
shroom.CanUnattach,
"Unattach %s?",
views.UnattachAskHTML,
)
var handlerDeleteAsk = factoryHandlerAsker(
"delete-ask",
shroom.CanDelete,
"Delete %s?",
views.DeleteAskHTML,
)
var handlerRenameAsk = factoryHandlerAsker(
"rename-ask",
shroom.CanRename,
"Rename %s?",
views.RenameAskHTML,
)
func factoryHandlerConfirmer(
actionPath string,
confirmer func(*hyphae.Hypha, *user.User, *http.Request) (*history.HistoryOp, string),
) func(http.ResponseWriter, *http.Request) {
return func(w http.ResponseWriter, rq *http.Request) {
util.PrepareRq(rq)
var (
hyphaName = util.HyphaNameFromRq(rq, actionPath)
h = hyphae.ByName(hyphaName)
u = user.FromRequest(rq)
)
if hop, errtitle := confirmer(h, u, rq); hop.HasErrors() {
httpErr(w, http.StatusInternalServerError, hyphaName,
errtitle,
hop.FirstErrorText())
return
}
http.Redirect(w, rq, "/hypha/"+hyphaName, http.StatusSeeOther)
}
}
var handlerUnattachConfirm = factoryHandlerConfirmer(
"unattach-confirm",
func(h *hyphae.Hypha, u *user.User, _ *http.Request) (*history.HistoryOp, string) {
return shroom.UnattachHypha(u, h)
},
)
var handlerDeleteConfirm = factoryHandlerConfirmer(
"delete-confirm",
func(h *hyphae.Hypha, u *user.User, _ *http.Request) (*history.HistoryOp, string) {
return shroom.DeleteHypha(u, h)
},
)
var handlerRenameConfirm = factoryHandlerConfirmer(
"rename-confirm",
func(oldHypha *hyphae.Hypha, u *user.User, rq *http.Request) (*history.HistoryOp, string) {
var (
newName = util.CanonicalName(rq.PostFormValue("new-name"))
recursive = rq.PostFormValue("recursive") == "true"
newHypha = hyphae.ByName(newName)
)
return shroom.RenameHypha(oldHypha, newHypha, recursive, u)
},
)
// handlerEdit shows the edit form. It doesn't edit anything actually.
func handlerEdit(w http.ResponseWriter, rq *http.Request) {
util.PrepareRq(rq)
var (
hyphaName = util.HyphaNameFromRq(rq, "edit")
h = hyphae.ByName(hyphaName)
warning string
textAreaFill string
err error
u = user.FromRequest(rq)
)
if err, errtitle := shroom.CanEdit(u, h); err != nil {
httpErr(w, http.StatusInternalServerError, hyphaName,
errtitle,
err.Error())
return
}
if h.Exists {
textAreaFill, err = shroom.FetchTextPart(h)
if err != nil {
log.Println(err)
httpErr(w, http.StatusInternalServerError, hyphaName,
"Error",
"Could not fetch text data")
return
}
} else {
warning = `<p class="warning warning_new-hypha">You are creating a new hypha.</p>`
}
util.HTTP200Page(
w,
views.BaseHTML(
"Edit "+hyphaName,
views.EditHTML(rq, hyphaName, textAreaFill, warning),
u))
}
// handlerUploadText uploads a new text part for the hypha.
func handlerUploadText(w http.ResponseWriter, rq *http.Request) {
util.PrepareRq(rq)
var (
hyphaName = util.HyphaNameFromRq(rq, "upload-text")
h = hyphae.ByName(hyphaName)
textData = rq.PostFormValue("text")
action = rq.PostFormValue("action")
u = user.FromRequest(rq)
hop *history.HistoryOp
errtitle string
)
if action != "Preview" {
hop, errtitle = shroom.UploadText(h, []byte(textData), u)
if hop.HasErrors() {
httpErr(w, http.StatusForbidden, hyphaName,
errtitle,
hop.FirstErrorText())
return
}
}
if action == "Preview" {
util.HTTP200Page(
w,
views.BaseHTML(
"Preview "+hyphaName,
views.PreviewHTML(
rq,
hyphaName,
textData,
"",
markup.Doc(hyphaName, textData).AsHTML()),
u))
} else {
http.Redirect(w, rq, "/hypha/"+hyphaName, http.StatusSeeOther)
}
}
// handlerUploadBinary uploads a new binary part for the hypha.
func handlerUploadBinary(w http.ResponseWriter, rq *http.Request) {
util.PrepareRq(rq)
rq.ParseMultipartForm(10 << 20) // Set upload limit
var (
hyphaName = util.HyphaNameFromRq(rq, "upload-binary")
h = hyphae.ByName(hyphaName)
u = user.FromRequest(rq)
file, handler, err = rq.FormFile("binary")
)
if err != nil {
httpErr(w, http.StatusInternalServerError, hyphaName,
"Error",
err.Error())
}
if err, errtitle := shroom.CanAttach(u, h); err != nil {
httpErr(w, http.StatusInternalServerError, hyphaName,
errtitle,
err.Error())
}
// If file is not passed:
if err != nil {
return
}
// If file is passed:
if file != nil {
defer file.Close()
}
var (
mime = handler.Header.Get("Content-Type")
hop, errtitle = shroom.UploadBinary(h, mime, file, u)
)
if hop.HasErrors() {
httpErr(w, http.StatusInternalServerError, hyphaName, errtitle, hop.FirstErrorText())
return
}
http.Redirect(w, rq, "/hypha/"+hyphaName, http.StatusSeeOther)
}