Finish browser-based template editor, resolves issue #90

build.py

@@ -38,7 +38,7 @@ release_files = (
 	"README.md",
 )
 
-GOCHAN_VERSION = "3.8.0"
+GOCHAN_VERSION = "3.9.0"
 DATABASE_VERSION = "2" # stored in DBNAME.DBPREFIXdatabase_version
 
 PATH_NOTHING = -1

examples/plugins/akismet.lua

@@ -7,7 +7,7 @@ local url = require("url")
 local check_key_url = "https://rest.akismet.com/1.1/verify-key"
 
 local base_headers = {}
-base_headers["User-Agent"] = "gochan/3.8 | Akismet/0.1"
+base_headers["User-Agent"] = "gochan/3.9 | Akismet/0.1"
 base_headers["Content-Type"] = "application/x-www-form-urlencoded"
 
 local key = "" -- read from akismet_key.txt

frontend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "gochan.js",
-  "version": "3.8.0",
+  "version": "3.9.0",
   "description": "",
   "main": "./ts/main.ts",
   "private": true,

html/error/404.html

@@ -7,6 +7,6 @@
 <h1>404: File not found</h1>
 <img src="/error/lol 404.gif" border="0" alt="">
 <p>The requested file could not be found on this server.</p>
-<hr/>Site powered by <a href="https://github.com/gochan-org/gochan" target="_blank">Gochan</a> v3.8.0
+<hr/>Site powered by <a href="https://github.com/gochan-org/gochan" target="_blank">Gochan</a> v3.9.0
 </body>
 </html>

html/error/500.html

@@ -7,6 +7,6 @@
 <h1>Error 500: Internal Server error</h1>
 <img src="/error/server500.gif" border="0" alt="">
 <p>The server encountered an error while trying to serve the page, and we apologize for the inconvenience. The <a href="https://en.wikipedia.org/wiki/Idiot">system administrator</a> will try to fix things as soon they get around to it, whenever that is. Hopefully soon.</p>
-<hr/>Site powered by <a href="https://github.com/gochan-org/gochan" target="_blank">Gochan</a> v3.8.0
+<hr/>Site powered by <a href="https://github.com/gochan-org/gochan" target="_blank">Gochan</a> v3.9.0
 </body>
 </html>

html/error/502.html

@@ -7,6 +7,6 @@
 <h1>Error 502: Bad gateway</h1>
 <img src="/error/server500.gif" border="0" alt="">
 <p>The server encountered an error while trying to serve the page, and we apologize for the inconvenience. The <a href="https://en.wikipedia.org/wiki/Idiot">system administrator</a> will try to fix things as soon they get around to it, whenever that is. Hopefully soon.</p>
-<hr/>Site powered by <a href="https://github.com/gochan-org/gochan" target="_blank">Gochan</a> v3.8.0
+<hr/>Site powered by <a href="https://github.com/gochan-org/gochan" target="_blank">Gochan</a> v3.9.0
 </body>
 </html>

pkg/gctemplates/templates.go

@@ -18,6 +18,7 @@ const (
 	Catalog             = "catalog.html"
 	JsConsts            = "consts.js"
 	ErrorPage           = "error.html"
+	FrontIntro          = "front_intro.html"
 	FrontPage           = "front.html"
 	ManageAnnouncements = "manage_announcements.html"
 	ManageAppeals       = "manage_appeals.html"
@@ -66,6 +67,9 @@ var (
 		ErrorPage: {
 			files: []string{"error.html"},
 		},
+		FrontIntro: {
+			files: []string{"front_intro.html"},
+		},
 		FrontPage: {
 			files: []string{"front.html", "topbar.html", "front_intro.html", "page_header.html", "page_footer.html"},
 		},

pkg/manage/actionsAdminPerm.go

@@ -10,6 +10,7 @@ import (
 	"os"
 	"path"
 	"strconv"
+	"time"
 
 	"github.com/gochan-org/gochan/pkg/building"
 	"github.com/gochan-org/gochan/pkg/config"
@@ -425,29 +426,125 @@ func registerAdminPages() {
 			Callback: func(writer http.ResponseWriter, request *http.Request, staff *gcsql.Staff, wantsJSON bool, infoEv, errEv *zerolog.Event) (output interface{}, err error) {
 				buf := bytes.NewBufferString("")
 
-				selectedTemplate := request.PostFormValue("templateselect")
+				selectedTemplate := request.FormValue("override")
+				templatesDir := config.GetSystemCriticalConfig().TemplateDir
+				var overriding string
 				var templateStr string
+				var templatePath string
+				var successStr string
 				if selectedTemplate != "" {
-					errEv.Str("selectedTemplate", selectedTemplate)
+					gcutil.LogStr("selectedTemplate", selectedTemplate, infoEv, errEv)
 
-					templatePath, err := gctemplates.GetTemplatePath(selectedTemplate)
-					if err != nil {
+					if templatePath, err = gctemplates.GetTemplatePath(selectedTemplate); err != nil {
 						errEv.Err(err).Caller().Msg("unable to load selected template")
 						return "", fmt.Errorf("template %q does not exist", selectedTemplate)
 					}
+					errEv.Str("templatePath", templatePath)
 					ba, err := os.ReadFile(templatePath)
 					if err != nil {
 						errEv.Err(err).Caller().Send()
 						return "", fmt.Errorf("unable to load selected template %q", selectedTemplate)
 					}
 					templateStr = string(ba)
+				} else if overriding = request.PostFormValue("overriding"); overriding != "" {
+					if templateStr = request.PostFormValue("templatetext"); templateStr == "" {
+						writer.WriteHeader(http.StatusBadRequest)
+						errEv.Caller().Int("status", http.StatusBadRequest).
+							Msg("received an empty template string")
+						return "", errors.New("received an empty template string")
+					}
+					if _, err = gctemplates.ParseTemplate(selectedTemplate, templateStr); err != nil {
+						// unable to parse submitted template
+						errEv.Err(err).Caller().Int("status", http.StatusBadRequest).Send()
+						writer.WriteHeader(http.StatusBadRequest)
+						return "", err
+					}
+					overrideDir := path.Join(templatesDir, "override")
+					overridePath := path.Join(overrideDir, overriding)
+					gcutil.LogStr("overridePath", overridePath, infoEv, errEv)
+
+					if _, err = os.Stat(overrideDir); os.IsNotExist(err) {
+						// override dir doesn't exist, create it
+						if err = os.Mkdir(overrideDir, config.GC_DIR_MODE); err != nil {
+							errEv.Err(err).Caller().
+								Int("status", http.StatusInternalServerError).
+								Msg("Unable to create override directory")
+							writer.WriteHeader(http.StatusInternalServerError)
+							return "", err
+						}
+					} else if err != nil {
+						// got an error checking for override dir
+						errEv.Err(err).Caller().
+							Int("status", http.StatusInternalServerError).
+							Msg("Unable to check if override directory exists")
+						writer.WriteHeader(http.StatusInternalServerError)
+						return "", err
 					}
 
-				serverutil.MinifyTemplate(gctemplates.ManageTemplates, map[string]any{
+					// get the original template file, or the latest override if there are any
+					templatePath, err := gctemplates.GetTemplatePath(overriding)
+					if err != nil {
+						errEv.Err(err).Caller().
+							Int("status", http.StatusInternalServerError).
+							Msg("Unable to get original template path")
+						writer.WriteHeader(http.StatusInternalServerError)
+						return "", err
+					}
+
+					// read original template path into []byte to be backed up
+					ba, err := os.ReadFile(templatePath)
+					if err != nil {
+						errEv.Err(err).Caller().
+							Int("status", http.StatusInternalServerError).
+							Msg("Unable to read original template file")
+						writer.WriteHeader(http.StatusInternalServerError)
+						return "", err
+					}
+
+					// back up template to override/<overriding>-<timestamp>.bkp
+					backupPath := path.Join(overrideDir, overriding) + time.Now().Format("-2006-01-02_15-04-05.bkp")
+					gcutil.LogStr("backupPath", backupPath, infoEv, errEv)
+					if err = os.WriteFile(backupPath, ba, config.GC_FILE_MODE); err != nil {
+						errEv.Err(err).Caller().
+							Int("status", http.StatusInternalServerError).
+							Msg("Unable to back up template file")
+						writer.WriteHeader(http.StatusInternalServerError)
+						return "", errors.New("unable to back up original template file")
+					}
+
+					// write changes to disk
+					if err = os.WriteFile(overridePath, []byte(templateStr), config.GC_FILE_MODE); err != nil {
+						errEv.Err(err).Caller().
+							Int("status", http.StatusInternalServerError).
+							Msg("Unable to save changes")
+						writer.WriteHeader(http.StatusInternalServerError)
+						return "", err
+					}
+
+					// reload template
+					if err = gctemplates.InitTemplates(overriding); err != nil {
+						errEv.Err(err).Caller().
+							Int("status", http.StatusInternalServerError).
+							Msg("Unable to reinitialize template")
+						writer.WriteHeader(http.StatusInternalServerError)
+						return "", err
+					}
+					successStr = fmt.Sprintf("%q saved successfully.\n Original backed up to %s",
+						overriding, backupPath)
+					infoEv.Msg("Template successfully saved and reloaded")
+				}
+
+				data := map[string]any{
 					"templates":        gctemplates.GetTemplateList(),
+					"templatesDir":     templatesDir,
+					"templatePath":     templatePath,
 					"selectedTemplate": selectedTemplate,
-					"templateText":     templateStr,
-				}, buf, "text/html")
+					"success":          successStr,
+				}
+				if templateStr != "" && successStr == "" {
+					data["templateText"] = templateStr
+				}
+				serverutil.MinifyTemplate(gctemplates.ManageTemplates, data, buf, "text/html")
 				return buf.String(), nil
 			}},
 		Action{

templates/manage_templateoverride.html

@@ -1,17 +1,30 @@
 <div style="text-align: center;">
-<form action="{{webPath "manage/templates"}}" method="POST" id="template-override">
+<form action="{{webPath "manage/templates"}}" method="{{with $.templateText}}POST{{else}}GET{{end}}" id="template-override">
 {{with $.templateText}}
 	<b>Editing: {{$.selectedTemplate}}</b>
+	<input type="hidden" name="overriding" value="{{$.selectedTemplate}}">
 	<textarea name="templatetext" class="template-text" rows="16" spellcheck="false">{{$.templateText}}</textarea>
-	<input type="submit" name="dooverride" value="Submit" onsubmit="return prompt('Are you sure you want to override the template?')">
-	<input type="submit" name="cancel" value="Cancel"/>
+	<input type="submit" name="dooverride" value="Submit" onclick="return confirm('Are you sure you want to override the template?')"/>
+	<input type="submit" name="cancel" value="Cancel"/ onclick="window.history.back()"/>
+</form>
+</div>
+<p>
+	When you submit your changes to a template, the latest change (or the original if there are no changes yet)
+	will be backed up to the "overrides" subdirectory of your configured templates directory, {{$.templatesDir}}, 
+	with a timestamp appended to the filename.
+</p>
 {{else}}
-	Select a template: <select name="templateselect">
+	{{- with .success}}
+	<div style="display:inline-block; outline: 4px solid green">
+		{{$.success}}<br/>
+		You may need to rebuild the respective page(s), or rebuild everything <a href='{{webPath "/manage/rebuildall"}}'>here</a>.
+	</div><br/><br/>{{- end -}}
+	Select a template: <select name="override">
 		{{range $t, $template := .templates}}
 			<option value="{{$template}}">{{$template}}</option>
 		{{end}}
 	</select>
-	<input type="submit" name="dotemplatechoose" value="Select template" />
-{{end}}
+	<input type="submit" value="Select template" />
 </form>
 </div>
+{{end}}