mirror of
https://github.com/osmarks/mycorrhiza.git
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Refactor and document some stuff
This commit is contained in:
Timur Ismagilov
247
web/mutators.go
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247
web/mutators.go
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@@ -0,0 +1,247 @@
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package web
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import (
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"fmt"
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"log"
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"net/http"
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"github.com/bouncepaw/mycorrhiza/history"
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"github.com/bouncepaw/mycorrhiza/hyphae"
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"github.com/bouncepaw/mycorrhiza/markup"
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"github.com/bouncepaw/mycorrhiza/shroom"
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"github.com/bouncepaw/mycorrhiza/user"
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"github.com/bouncepaw/mycorrhiza/util"
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"github.com/bouncepaw/mycorrhiza/views"
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)
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func initMutators() {
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// Those that do not actually mutate anything:
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http.HandleFunc("/edit/", handlerEdit)
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http.HandleFunc("/delete-ask/", handlerDeleteAsk)
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http.HandleFunc("/rename-ask/", handlerRenameAsk)
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http.HandleFunc("/unattach-ask/", handlerUnattachAsk)
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// And those that do mutate something:
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http.HandleFunc("/upload-binary/", handlerUploadBinary)
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http.HandleFunc("/upload-text/", handlerUploadText)
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http.HandleFunc("/delete-confirm/", handlerDeleteConfirm)
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http.HandleFunc("/rename-confirm/", handlerRenameConfirm)
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http.HandleFunc("/unattach-confirm/", handlerUnattachConfirm)
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}
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func factoryHandlerAsker(
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actionPath string,
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asker func(*user.User, *hyphae.Hypha) (error, string),
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succTitleTemplate string,
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succPageTemplate func(*http.Request, string, bool) string,
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) func(http.ResponseWriter, *http.Request) {
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return func(w http.ResponseWriter, rq *http.Request) {
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util.PrepareRq(rq)
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var (
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hyphaName = util.HyphaNameFromRq(rq, actionPath)
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h = hyphae.ByName(hyphaName)
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u = user.FromRequest(rq)
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)
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if err, errtitle := asker(u, h); err != nil {
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httpErr(
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w,
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http.StatusInternalServerError,
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hyphaName,
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errtitle,
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err.Error())
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return
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}
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util.HTTP200Page(
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w,
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views.BaseHTML(
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fmt.Sprintf(succTitleTemplate, hyphaName),
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succPageTemplate(rq, hyphaName, h.Exists),
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u))
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}
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}
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var handlerUnattachAsk = factoryHandlerAsker(
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"unattach-ask",
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shroom.CanUnattach,
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"Unattach %s?",
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views.UnattachAskHTML,
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)
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var handlerDeleteAsk = factoryHandlerAsker(
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"delete-ask",
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shroom.CanDelete,
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"Delete %s?",
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views.DeleteAskHTML,
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)
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var handlerRenameAsk = factoryHandlerAsker(
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"rename-ask",
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shroom.CanRename,
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"Rename %s?",
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views.RenameAskHTML,
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)
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func factoryHandlerConfirmer(
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actionPath string,
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confirmer func(*hyphae.Hypha, *user.User, *http.Request) (*history.HistoryOp, string),
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) func(http.ResponseWriter, *http.Request) {
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return func(w http.ResponseWriter, rq *http.Request) {
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util.PrepareRq(rq)
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var (
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hyphaName = util.HyphaNameFromRq(rq, actionPath)
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h = hyphae.ByName(hyphaName)
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u = user.FromRequest(rq)
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)
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if hop, errtitle := confirmer(h, u, rq); hop.HasErrors() {
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httpErr(w, http.StatusInternalServerError, hyphaName,
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errtitle,
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hop.FirstErrorText())
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return
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}
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http.Redirect(w, rq, "/hypha/"+hyphaName, http.StatusSeeOther)
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}
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}
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var handlerUnattachConfirm = factoryHandlerConfirmer(
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"unattach-confirm",
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func(h *hyphae.Hypha, u *user.User, _ *http.Request) (*history.HistoryOp, string) {
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return shroom.UnattachHypha(u, h)
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},
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)
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var handlerDeleteConfirm = factoryHandlerConfirmer(
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"delete-confirm",
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func(h *hyphae.Hypha, u *user.User, _ *http.Request) (*history.HistoryOp, string) {
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return shroom.DeleteHypha(u, h)
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},
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)
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var handlerRenameConfirm = factoryHandlerConfirmer(
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"rename-confirm",
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func(oldHypha *hyphae.Hypha, u *user.User, rq *http.Request) (*history.HistoryOp, string) {
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var (
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newName = util.CanonicalName(rq.PostFormValue("new-name"))
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recursive = rq.PostFormValue("recursive") == "true"
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newHypha = hyphae.ByName(newName)
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)
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return shroom.RenameHypha(oldHypha, newHypha, recursive, u)
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},
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)
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// handlerEdit shows the edit form. It doesn't edit anything actually.
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func handlerEdit(w http.ResponseWriter, rq *http.Request) {
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util.PrepareRq(rq)
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var (
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hyphaName = util.HyphaNameFromRq(rq, "edit")
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h = hyphae.ByName(hyphaName)
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warning string
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textAreaFill string
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err error
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u = user.FromRequest(rq)
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)
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if err, errtitle := shroom.CanEdit(u, h); err != nil {
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httpErr(w, http.StatusInternalServerError, hyphaName,
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errtitle,
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err.Error())
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return
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}
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if h.Exists {
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textAreaFill, err = shroom.FetchTextPart(h)
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if err != nil {
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log.Println(err)
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httpErr(w, http.StatusInternalServerError, hyphaName,
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"Error",
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"Could not fetch text data")
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return
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}
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} else {
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warning = `<p class="warning warning_new-hypha">You are creating a new hypha.</p>`
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}
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util.HTTP200Page(
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w,
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views.BaseHTML(
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"Edit "+hyphaName,
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views.EditHTML(rq, hyphaName, textAreaFill, warning),
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u))
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}
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// handlerUploadText uploads a new text part for the hypha.
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func handlerUploadText(w http.ResponseWriter, rq *http.Request) {
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util.PrepareRq(rq)
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var (
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hyphaName = util.HyphaNameFromRq(rq, "upload-text")
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h = hyphae.ByName(hyphaName)
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textData = rq.PostFormValue("text")
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action = rq.PostFormValue("action")
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u = user.FromRequest(rq)
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hop *history.HistoryOp
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errtitle string
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)
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if action != "Preview" {
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hop, errtitle = shroom.UploadText(h, []byte(textData), u)
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if hop.HasErrors() {
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httpErr(w, http.StatusForbidden, hyphaName,
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errtitle,
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hop.FirstErrorText())
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return
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}
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}
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if action == "Preview" {
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util.HTTP200Page(
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w,
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views.BaseHTML(
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"Preview "+hyphaName,
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views.PreviewHTML(
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rq,
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hyphaName,
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textData,
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"",
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markup.Doc(hyphaName, textData).AsHTML()),
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u))
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} else {
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http.Redirect(w, rq, "/hypha/"+hyphaName, http.StatusSeeOther)
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}
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}
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// handlerUploadBinary uploads a new binary part for the hypha.
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func handlerUploadBinary(w http.ResponseWriter, rq *http.Request) {
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util.PrepareRq(rq)
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rq.ParseMultipartForm(10 << 20) // Set upload limit
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var (
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hyphaName = util.HyphaNameFromRq(rq, "upload-binary")
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h = hyphae.ByName(hyphaName)
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u = user.FromRequest(rq)
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file, handler, err = rq.FormFile("binary")
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)
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if err != nil {
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httpErr(w, http.StatusInternalServerError, hyphaName,
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"Error",
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err.Error())
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}
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if err, errtitle := shroom.CanAttach(u, h); err != nil {
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httpErr(w, http.StatusInternalServerError, hyphaName,
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errtitle,
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err.Error())
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}
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// If file is not passed:
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if err != nil {
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return
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}
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// If file is passed:
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if file != nil {
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defer file.Close()
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}
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var (
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mime = handler.Header.Get("Content-Type")
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hop, errtitle = shroom.UploadBinary(h, mime, file, u)
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)
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if hop.HasErrors() {
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httpErr(w, http.StatusInternalServerError, hyphaName, errtitle, hop.FirstErrorText())
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return
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}
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http.Redirect(w, rq, "/hypha/"+hyphaName, http.StatusSeeOther)
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}
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