Unsubscribe from feed through link or "#"

After importing old OPML files, you may discover that many feeds are
obsolete or uninteresting. You list the feeds entries and determine that
you want to unsubscribe. This needs three clicks (edit feed, delete,
confirm) and requires moving the mouse to hit the different targets.

This quickly becomes tiring, if you are up to possibly deleting hundreds
of feeds. One mediation, introduced in this commit, is to add an
unsubscribe link to each feed's entry listing view, and also adding a
keyboard shortcut.

The keyboard shortcut "#" is:
* longer than one keystroke (requires shift)
* hard to type by accident
* used in Google products (thanks for the hint @fguillot)

In an effort to try to reduce the number of accidental feed
unsubscriptions.

4 files changed, 26 insertions, 2 deletions

diff --git a/ui/static/js.go b/ui/static/js.go
index 90d78f0..5ffc0b8 100644
--- a/ui/static/js.go
+++ b/ui/static/js.go
@@ -56,6 +56,7 @@ static saveEntry(element){if(element.dataset.completed){return;}
 element.innerHTML=element.dataset.labelLoading;let request=new RequestBuilder(element.dataset.saveUrl);request.withCallback(()=>{element.innerHTML=element.dataset.labelDone;element.dataset.completed=true;});request.execute();}
 static fetchOriginalContent(element){if(element.dataset.completed){return;}
 element.innerHTML=element.dataset.labelLoading;let request=new RequestBuilder(element.dataset.fetchContentUrl);request.withCallback((response)=>{element.innerHTML=element.dataset.labelDone;element.dataset.completed=true;response.json().then((data)=>{if(data.hasOwnProperty("content")){document.querySelector(".entry-content").innerHTML=data.content;}});});request.execute();}}
+class FeedHandler{static unsubscribe(feedUrl,callback){let request=new RequestBuilder(feedUrl);request.withCallback(callback);request.execute();}}
 class ConfirmHandler{executeRequest(url,redirectURL){let request=new RequestBuilder(url);request.withCallback(()=>{if(redirectURL){window.location.href=redirectURL;}else{window.location.reload();}});request.execute();}
 handle(event){let questionElement=document.createElement("span");let linkElement=event.target;let containerElement=linkElement.parentNode;linkElement.style.display="none";let yesElement=document.createElement("a");yesElement.href="#";yesElement.appendChild(document.createTextNode(linkElement.dataset.labelYes));yesElement.onclick=(event)=>{event.preventDefault();let loadingElement=document.createElement("span");loadingElement.className="loading";loadingElement.appendChild(document.createTextNode(linkElement.dataset.labelLoading));questionElement.remove();containerElement.appendChild(loadingElement);this.executeRequest(linkElement.dataset.url,linkElement.dataset.redirectUrl);};let noElement=document.createElement("a");noElement.href="#";noElement.appendChild(document.createTextNode(linkElement.dataset.labelNo));noElement.onclick=(event)=>{event.preventDefault();linkElement.style.display="inline";questionElement.remove();};questionElement.className="confirm";questionElement.appendChild(document.createTextNode(linkElement.dataset.labelQuestion+" "));questionElement.appendChild(yesElement);questionElement.appendChild(document.createTextNode(", "));questionElement.appendChild(noElement);containerElement.appendChild(questionElement);}}
 class MenuHandler{clickMenuListItem(event){let element=event.target;if(element.tagName==="A"){window.location.href=element.getAttribute("href");}else{window.location.href=element.querySelector("a").getAttribute("href");}}
@@ -80,6 +81,7 @@ toggleBookmarkLink(parent){let bookmarkLink=parent.querySelector("a[data-toggle-
 openOriginalLink(){let entryLink=document.querySelector(".entry h1 a");if(entryLink!==null){DomHelper.openNewTab(entryLink.getAttribute("href"));return;}
 let currentItemOriginalLink=document.querySelector(".current-item a[data-original-link]");if(currentItemOriginalLink!==null){DomHelper.openNewTab(currentItemOriginalLink.getAttribute("href"));let currentItem=document.querySelector(".current-item");this.goToNextListItem();EntryHandler.markEntryAsRead(currentItem);}}
 openSelectedItem(){let currentItemLink=document.querySelector(".current-item .item-title a");if(currentItemLink!==null){window.location.href=currentItemLink.getAttribute("href");}}
+unsubscribeFromFeed(){let unsubscribeLinks=document.querySelectorAll("[data-action=remove-feed]");if(unsubscribeLinks.length===1){let unsubscribeLink=unsubscribeLinks[0];FeedHandler.unsubscribe(unsubscribeLink.dataset.url,()=>{if(unsubscribeLink.dataset.redirectUrl){window.location.href=unsubscribeLink.dataset.redirectUrl;}else{window.location.reload();}});}}
 goToPage(page,fallbackSelf){let element=document.querySelector("a[data-page="+page+"]");if(element){document.location.href=element.href;}else if(fallbackSelf){window.location.reload();}}
 goToPrevious(){if(this.isListView()){this.goToPreviousListItem();}else{this.goToPage("previous");}}
 goToNext(){if(this.isListView()){this.goToNextListItem();}else{this.goToPage("next");}}
@@ -93,13 +95,13 @@ for(let i=0;i<items.length;i++){if(items[i].classList.contains("current-item")){
 break;}}}
 isListView(){return document.querySelector(".items")!==null;}}
 class LinkStateHandler{static flip(element){let labelElement=document.createElement("span");labelElement.className="link-flipped-state";labelElement.appendChild(document.createTextNode(element.dataset.labelNewState));element.parentNode.appendChild(labelElement);element.parentNode.removeChild(element);}}
-document.addEventListener("DOMContentLoaded",function(){FormHandler.handleSubmitButtons();let touchHandler=new TouchHandler();touchHandler.listen();let navHandler=new NavHandler();let keyboardHandler=new KeyboardHandler();keyboardHandler.on("g u",()=>navHandler.goToPage("unread"));keyboardHandler.on("g b",()=>navHandler.goToPage("starred"));keyboardHandler.on("g h",()=>navHandler.goToPage("history"));keyboardHandler.on("g f",()=>navHandler.goToPage("feeds"));keyboardHandler.on("g c",()=>navHandler.goToPage("categories"));keyboardHandler.on("g s",()=>navHandler.goToPage("settings"));keyboardHandler.on("ArrowLeft",()=>navHandler.goToPrevious());keyboardHandler.on("ArrowRight",()=>navHandler.goToNext());keyboardHandler.on("j",()=>navHandler.goToPrevious());keyboardHandler.on("p",()=>navHandler.goToPrevious());keyboardHandler.on("k",()=>navHandler.goToNext());keyboardHandler.on("n",()=>navHandler.goToNext());keyboardHandler.on("h",()=>navHandler.goToPage("previous"));keyboardHandler.on("l",()=>navHandler.goToPage("next"));keyboardHandler.on("o",()=>navHandler.openSelectedItem());keyboardHandler.on("v",()=>navHandler.openOriginalLink());keyboardHandler.on("m",()=>navHandler.toggleEntryStatus());keyboardHandler.on("A",()=>navHandler.markPageAsRead());keyboardHandler.on("s",()=>navHandler.saveEntry());keyboardHandler.on("d",()=>navHandler.fetchOriginalContent());keyboardHandler.on("f",()=>navHandler.toggleBookmark());keyboardHandler.on("?",()=>navHandler.showKeyboardShortcuts());keyboardHandler.on("/",(e)=>navHandler.setFocusToSearchInput(e));keyboardHandler.on("Escape",()=>ModalHandler.close());keyboardHandler.listen();let mouseHandler=new MouseHandler();mouseHandler.onClick("a[data-save-entry]",(event)=>{EntryHandler.saveEntry(event.target);});mouseHandler.onClick("a[data-toggle-bookmark]",(event)=>{EntryHandler.toggleBookmark(event.target);});mouseHandler.onClick("a[data-toggle-status]",(event)=>{let currentItem=DomHelper.findParent(event.target,"entry");if(!currentItem){currentItem=DomHelper.findParent(event.target,"item");}
+document.addEventListener("DOMContentLoaded",function(){FormHandler.handleSubmitButtons();let touchHandler=new TouchHandler();touchHandler.listen();let navHandler=new NavHandler();let keyboardHandler=new KeyboardHandler();keyboardHandler.on("g u",()=>navHandler.goToPage("unread"));keyboardHandler.on("g b",()=>navHandler.goToPage("starred"));keyboardHandler.on("g h",()=>navHandler.goToPage("history"));keyboardHandler.on("g f",()=>navHandler.goToPage("feeds"));keyboardHandler.on("g c",()=>navHandler.goToPage("categories"));keyboardHandler.on("g s",()=>navHandler.goToPage("settings"));keyboardHandler.on("ArrowLeft",()=>navHandler.goToPrevious());keyboardHandler.on("ArrowRight",()=>navHandler.goToNext());keyboardHandler.on("j",()=>navHandler.goToPrevious());keyboardHandler.on("p",()=>navHandler.goToPrevious());keyboardHandler.on("k",()=>navHandler.goToNext());keyboardHandler.on("n",()=>navHandler.goToNext());keyboardHandler.on("h",()=>navHandler.goToPage("previous"));keyboardHandler.on("l",()=>navHandler.goToPage("next"));keyboardHandler.on("o",()=>navHandler.openSelectedItem());keyboardHandler.on("v",()=>navHandler.openOriginalLink());keyboardHandler.on("m",()=>navHandler.toggleEntryStatus());keyboardHandler.on("A",()=>navHandler.markPageAsRead());keyboardHandler.on("s",()=>navHandler.saveEntry());keyboardHandler.on("d",()=>navHandler.fetchOriginalContent());keyboardHandler.on("f",()=>navHandler.toggleBookmark());keyboardHandler.on("?",()=>navHandler.showKeyboardShortcuts());keyboardHandler.on("#",()=>navHandler.unsubscribeFromFeed());keyboardHandler.on("/",(e)=>navHandler.setFocusToSearchInput(e));keyboardHandler.on("Escape",()=>ModalHandler.close());keyboardHandler.listen();let mouseHandler=new MouseHandler();mouseHandler.onClick("a[data-save-entry]",(event)=>{EntryHandler.saveEntry(event.target);});mouseHandler.onClick("a[data-toggle-bookmark]",(event)=>{EntryHandler.toggleBookmark(event.target);});mouseHandler.onClick("a[data-toggle-status]",(event)=>{let currentItem=DomHelper.findParent(event.target,"entry");if(!currentItem){currentItem=DomHelper.findParent(event.target,"item");}
 if(currentItem){EntryHandler.toggleEntryStatus(currentItem);}});mouseHandler.onClick("a[data-fetch-content-entry]",(event)=>{EntryHandler.fetchOriginalContent(event.target);});mouseHandler.onClick("a[data-on-click=markPageAsRead]",()=>navHandler.markPageAsRead());mouseHandler.onClick("a[data-confirm]",(event)=>{(new ConfirmHandler()).handle(event);});mouseHandler.onClick("a[data-action=search]",(event)=>{navHandler.setFocusToSearchInput(event);});mouseHandler.onClick("a[data-link-state=flip]",(event)=>{LinkStateHandler.flip(event.target);},true);if(document.documentElement.clientWidth<600){let menuHandler=new MenuHandler();mouseHandler.onClick(".logo",()=>menuHandler.toggleMainMenu());mouseHandler.onClick(".header nav li",(event)=>menuHandler.clickMenuListItem(event));}
 if("serviceWorker"in navigator){let scriptElement=document.getElementById("service-worker-script");if(scriptElement){navigator.serviceWorker.register(scriptElement.src);}}});})();`,
 	"sw": `'use strict';self.addEventListener("fetch",(event)=>{if(event.request.url.includes("/feed/icon/")){event.respondWith(caches.open("feed_icons").then((cache)=>{return cache.match(event.request).then((response)=>{return response||fetch(event.request).then((response)=>{cache.put(event.request,response.clone());return response;});});}));}});`,
 }
 
 var JavascriptsChecksums = map[string]string{
-	"app": "205a1e308450a89d71ecf7d278718fd030a13d97cd1b49f75855029cc5ff613c",
+	"app": "6d1dc775cab31cdb7275e38c32c4ae714e330df897c7515e84e021878359e3d5",
 	"sw":  "55fffa223919cc18572788fb9c62fccf92166c0eb5d3a1d6f91c31f24d020be9",
 }
diff --git a/ui/static/js/bootstrap.js b/ui/static/js/bootstrap.js
index a89799a..3c2bb35 100644
--- a/ui/static/js/bootstrap.js
+++ b/ui/static/js/bootstrap.js
@@ -28,6 +28,7 @@ document.addEventListener("DOMContentLoaded", function() {
     keyboardHandler.on("d", () => navHandler.fetchOriginalContent());
     keyboardHandler.on("f", () => navHandler.toggleBookmark());
     keyboardHandler.on("?", () => navHandler.showKeyboardShortcuts());
+    keyboardHandler.on("#", () => navHandler.unsubscribeFromFeed());
     keyboardHandler.on("/", (e) => navHandler.setFocusToSearchInput(e));
     keyboardHandler.on("Escape", () => ModalHandler.close());
     keyboardHandler.listen();
diff --git a/ui/static/js/feed_handler.js b/ui/static/js/feed_handler.js
new file mode 100644
index 0000000..1d4190f
--- /dev/null
+++ b/ui/static/js/feed_handler.js
@@ -0,0 +1,7 @@
+class FeedHandler {
+    static unsubscribe(feedUrl, callback) {
+        let request = new RequestBuilder(feedUrl);
+        request.withCallback(callback);
+        request.execute();
+    }
+}
diff --git a/ui/static/js/nav_handler.js b/ui/static/js/nav_handler.js
index 5d2474b..5f611e0 100644
--- a/ui/static/js/nav_handler.js
+++ b/ui/static/js/nav_handler.js
@@ -129,6 +129,20 @@ class NavHandler {
         }
     }
 
+    unsubscribeFromFeed() {
+        let unsubscribeLinks = document.querySelectorAll("[data-action=remove-feed]");
+        if (unsubscribeLinks.length === 1) {
+            let unsubscribeLink = unsubscribeLinks[0];
+            FeedHandler.unsubscribe(unsubscribeLink.dataset.url, () => {
+                if (unsubscribeLink.dataset.redirectUrl) {
+                    window.location.href = unsubscribeLink.dataset.redirectUrl;
+                } else {
+                    window.location.reload();
+                }
+            });
+        }
+    }
+
     /**
      * @param {string} page Page to redirect to.
      * @param {boolean} fallbackSelf Refresh actual page if the page is not found.