Function to re-sign photo URLs on profile pages

* With the new JWT signatures on photo URLs, it was no longer possible for
  creative users to embed their gallery photos on their profile page.
* Add a function to ReSignPhotoLinks that finds/replaces (on the server side)
  all references to paths under "/static/photos/" and gives them a fresh
  ?jwt= query string signature.
* Note: only applies to the profile page essays, ReSignPhotoLinks is a
  template func that must be opted-in on a per page basis.

Other miscellaneous fixes

* Add "Edit" buttons in the corners of profile cards, when the current user
  looks at their profile page. They link to URIs like
  "/settings#profile/about_me" which will now:
  1. Select the "Profile settings" tab like #profile
  2. Scroll and focus the profile essay field that the user clicked to edit.

pkg/config/config.go

@@ -25,6 +25,10 @@ const (
 	PhotoDiskPath = "./web/static/photos"
 )
 
+// PhotoURLRegexp describes an image path under "/static/photos" that can be parsed from Markdown or HTML input.
+// It is used by e.g. the ReSignURLs function - if you move image URLs to a CDN this may need updating.
+var PhotoURLRegexp = regexp.MustCompile(`(?:['"])(/static/photos/[^'"\s?]+(?:\?[^'"\s]*)?)(?:['"]|[^'"\s]*)`)
+
 // Security
 const (
 	BcryptCost            = 14

pkg/photo/photosign.go

@@ -1,6 +1,7 @@
 package photo
 
 import (
+	"strings"
 	"time"
 
 	"code.nonshy.com/nonshy/website/pkg/config"
@@ -28,6 +29,30 @@ func VisibleAvatarURL(user, currentUser *models.User) string {
 	return "/static/img/shy.png"
 }
 
+// ReSignPhotoLinks will search a blob of text for photo gallery links ("/static/photos/*") and re-sign
+// their JWT security tokens.
+func ReSignPhotoLinks(currentUser *models.User, text string) string {
+	var matches = config.PhotoURLRegexp.FindAllStringSubmatch(text, -1)
+	for _, m := range matches {
+		var (
+			origString = m[0]
+			url        = m[1]
+			filename   string
+		)
+		log.Error("ReSignPhotoLinks: got [%s] url [%s]", origString, url)
+
+		// Trim the /static/photos/ prefix off to get the URL down to its base filename.
+		filename = strings.Split(url, "?")[0]
+		filename = strings.TrimPrefix(filename, config.PhotoWebPath)
+		filename = strings.TrimPrefix(filename, "/")
+
+		// Sign the URL and replace the original.
+		signed := SignedPhotoURL(currentUser, filename)
+		text = strings.ReplaceAll(text, origString, signed)
+	}
+	return text
+}
+
 // SignedPhotoURL returns a URL path to a photo's filename, signed for the current user only.
 func SignedPhotoURL(user *models.User, filename string) string {
 	return createSignedPhotoURL(user.ID, user.Username, filename, false)

pkg/templates/template_funcs.go

@@ -71,6 +71,14 @@ func TemplateFuncs(r *http.Request) template.FuncMap {
 
 		// Get a description for an admin scope (e.g. for transparency page).
 		"AdminScopeDescription": config.AdminScopeDescription,
+
+		// "ReSignPhotoLinks": photo.ReSignPhotoLinks,
+		"ReSignPhotoLinks": func(s template.HTML) template.HTML {
+			if currentUser, err := session.CurrentUser(r); err == nil {
+				return template.HTML(photo.ReSignPhotoLinks(currentUser, string(s)))
+			}
+			return s
+		},
 	}
 }
 

web/templates/account/profile.html

@@ -314,42 +314,75 @@
             <div class="column is-two-thirds">
                 <div class="card block">
                     <header class="card-header has-background-link">
-                        <p class="card-header-title has-text-light">
+                        <div class="card-header-title">
+                            <div class="columns is-mobile is-gapless nonshy-fullwidth">
+                                <div class="column">
                                     About Me
-                        </p>
+                                </div>
+                                {{if eq .CurrentUser.ID .User.ID}}
+                                <div class="column is-narrow">
+                                    <a href="/settings#profile/about_me" class="button is-outlined is-small">
+                                        <i class="fa fa-pencil"></i>
+                                    </a>
+                                </div>
+                                {{end}}
+                            </div>
+                        </div>
                     </header>
 
                     <div class="card-content">
                         <div class="content">
-                            {{or (ToMarkdown (.User.GetProfileField "about_me")) "n/a"}}
+                            {{or (ReSignPhotoLinks (ToMarkdown (.User.GetProfileField "about_me"))) "n/a"}}
                         </div>
                     </div>
                 </div>
 
                 <div class="card block">
                     <header class="card-header has-background-link">
-                        <p class="card-header-title has-text-light">
+                        <div class="card-header-title">
+                            <div class="columns is-mobile is-gapless nonshy-fullwidth">
+                                <div class="column">
                                     My Interests
-                        </p>
+                                </div>
+                                {{if eq .CurrentUser.ID .User.ID}}
+                                <div class="column is-narrow">
+                                    <a href="/settings#profile/interests" class="button is-outlined is-small">
+                                        <i class="fa fa-pencil"></i>
+                                    </a>
+                                </div>
+                                {{end}}
+                            </div>
+                        </div>
                     </header>
 
                     <div class="card-content">
                         <div class="content">
-                            {{or (ToMarkdown (.User.GetProfileField "interests")) "n/a"}}
+                            {{or (ReSignPhotoLinks (ToMarkdown (.User.GetProfileField "interests"))) "n/a"}}
                         </div>
                     </div>
                 </div>
 
                 <div class="card block">
                     <header class="card-header has-background-link">
-                        <p class="card-header-title has-text-light">
+                        <div class="card-header-title">
+                            <div class="columns is-mobile is-gapless nonshy-fullwidth">
+                                <div class="column">
                                     Music/Bands/Movies
-                        </p>
+                                </div>
+                                {{if eq .CurrentUser.ID .User.ID}}
+                                <div class="column is-narrow">
+                                    <a href="/settings#profile/music_movies" class="button is-outlined is-small">
+                                        <i class="fa fa-pencil"></i>
+                                    </a>
+                                </div>
+                                {{end}}
+                            </div>
+                        </div>
                     </header>
 
                     <div class="card-content">
                         <div class="content">
-                            {{or (ToMarkdown (.User.GetProfileField "music_movies")) "n/a"}}
+                            {{or (ReSignPhotoLinks (ToMarkdown (.User.GetProfileField "music_movies"))) "n/a"}}
                         </div>
                     </div>
                 </div>

web/templates/account/settings.html

@@ -307,7 +307,7 @@
                             </div>
                         </div>
 
-                        <div class="field">
+                        <div class="field" id="profile/about_me">
                             <label class="label" for="about_me">About Me</label>
                             <textarea class="textarea" cols="60" rows="4"
                                 id="about_me"
@@ -318,7 +318,7 @@
                             </p>
                         </div>
 
-                        <div class="field">
+                        <div class="field" id="profile/interests">
                             <label class="label" for="interests">My Interests</label>
                             <textarea class="textarea" cols="60" rows="4"
                                 id="interests"
@@ -326,7 +326,7 @@
                                 placeholder="What kinds of things make you curious?">{{$User.GetProfileField "interests"}}</textarea>
                         </div>
 
-                        <div class="field">
+                        <div class="field" id="profile/music_movies">
                             <label class="label" for="music_movies">Music/Bands/Movies</label>
                             <textarea class="textarea" cols="60" rows="4"
                                 id="music_movies"
@@ -1421,9 +1421,10 @@ window.addEventListener("DOMContentLoaded", (event) => {
     // Global function to toggle the active tab.
     const showTab = (name) => {
         name = name.replace(/\.$/, '');
-        if (!name) name = "profile";
+        let tabName = name.split('/')[0]; // "#profile/about_me"
+        if (!tabName) name = "profile";
         $activeTab.style.display = 'none';
-        switch (name) {
+        switch (tabName) {
             case "look":
                 $activeTab = $look;
                 break;
@@ -1486,9 +1487,9 @@ window.addEventListener("DOMContentLoaded", (event) => {
 
     // Show the requested tab on first page load.
     showTab(window.location.hash.replace(/^#/, ''));
-    window.requestAnimationFrame(() => {
+    // window.requestAnimationFrame(() => {
-        window.scrollTo(0, 0);
+    //     window.scrollTo(0, 0);
-    });
+    // });
 });
 
 // Look & Feel tab scripts.