1 files changed, 351 insertions, 0 deletions
diff --git a/server/static/js/app.js b/server/static/js/app.js
new file mode 100644
index 00000000..46a8f720
--- /dev/null
+++ b/server/static/js/app.js
@@ -0,0 +1,351 @@
+/*jshint esversion: 6 */
+(function() {
+'use strict';
+
+class KeyboardHandler {
+    constructor() {
+        this.queue = [];
+        this.shortcuts = {};
+    }
+
+    on(combination, callback) {
+        this.shortcuts[combination] = callback;
+    }
+
+    listen() {
+        document.onkeydown = (event) => {
+            if (this.isEventIgnored(event)) {
+                return;
+            }
+
+            let key = this.getKey(event);
+            this.queue.push(key);
+
+            for (let combination in this.shortcuts) {
+                let keys = combination.split(" ");
+
+                if (keys.every((value, index) => value === this.queue[index])) {
+                    this.queue = [];
+                    this.shortcuts[combination]();
+                    return;
+                }
+
+                if (keys.length === 1 && key === keys[0]) {
+                    this.queue = [];
+                    this.shortcuts[combination]();
+                    return;
+                }
+            }
+
+            if (this.queue.length >= 2) {
+                this.queue = [];
+            }
+        };
+    }
+
+    isEventIgnored(event) {
+        return event.target.tagName === "INPUT" || event.target.tagName === "TEXTAREA";
+    }
+
+    getKey(event) {
+        const mapping = {
+            'Esc': 'Escape',
+            'Up': 'ArrowUp',
+            'Down': 'ArrowDown',
+            'Left': 'ArrowLeft',
+            'Right': 'ArrowRight'
+        };
+
+        for (let key in mapping) {
+            if (mapping.hasOwnProperty(key) && key === event.key) {
+                return mapping[key];
+            }
+        }
+
+        return event.key;
+    }
+}
+
+class FormHandler {
+    static handleSubmitButtons() {
+        let elements = document.querySelectorAll("form");
+        elements.forEach(function (element) {
+            element.onsubmit = function () {
+                let button = document.querySelector("button");
+
+                if (button) {
+                    button.innerHTML = button.dataset.labelLoading;
+                    button.disabled = true;
+                }
+            };
+        });
+    }
+}
+
+class MouseHandler {
+    onClick(selector, callback) {
+        let elements = document.querySelectorAll(selector);
+        elements.forEach((element) => {
+            element.onclick = (event) => {
+                event.preventDefault();
+                callback(event);
+            };
+        });
+    }
+}
+
+class App {
+    run() {
+        FormHandler.handleSubmitButtons();
+
+        let keyboardHandler = new KeyboardHandler();
+        keyboardHandler.on("g u", () => this.goToPage("unread"));
+        keyboardHandler.on("g h", () => this.goToPage("history"));
+        keyboardHandler.on("g f", () => this.goToPage("feeds"));
+        keyboardHandler.on("g c", () => this.goToPage("categories"));
+        keyboardHandler.on("g s", () => this.goToPage("settings"));
+        keyboardHandler.on("ArrowLeft", () => this.goToPrevious());
+        keyboardHandler.on("ArrowRight", () => this.goToNext());
+        keyboardHandler.on("j", () => this.goToPrevious());
+        keyboardHandler.on("p", () => this.goToPrevious());
+        keyboardHandler.on("k", () => this.goToNext());
+        keyboardHandler.on("n", () => this.goToNext());
+        keyboardHandler.on("h", () => this.goToPage("previous"));
+        keyboardHandler.on("l", () => this.goToPage("next"));
+        keyboardHandler.on("o", () => this.openSelectedItem());
+        keyboardHandler.on("v", () => this.openOriginalLink());
+        keyboardHandler.on("m", () => this.toggleEntryStatus());
+        keyboardHandler.on("A", () => this.markPageAsRead());
+        keyboardHandler.listen();
+
+        let mouseHandler = new MouseHandler();
+        mouseHandler.onClick("a[data-on-click=markPageAsRead]", () => this.markPageAsRead());
+
+        if (document.documentElement.clientWidth < 600) {
+            mouseHandler.onClick(".logo", () => this.toggleMainMenu());
+            mouseHandler.onClick(".header nav li", (event) => this.clickMenuListItem(event));
+        }
+    }
+
+    clickMenuListItem(event) {
+        let element = event.target;console.log(element);
+
+        if (element.tagName === "A") {
+            window.location.href = element.getAttribute("href");
+        } else {
+            window.location.href = element.querySelector("a").getAttribute("href");
+        }
+    }
+
+    toggleMainMenu() {
+        let menu = document.querySelector(".header nav ul");
+        if (this.isVisible(menu)) {
+            menu.style.display = "none";
+        } else {
+            menu.style.display = "block";
+        }
+    }
+
+    updateEntriesStatus(entryIDs, status) {
+        let url = document.body.dataset.entriesStatusUrl;
+        let request = new Request(url, {
+            method: "POST",
+            cache: "no-cache",
+            credentials: "include",
+            body: JSON.stringify({entry_ids: entryIDs, status: status}),
+            headers: new Headers({
+                "Content-Type": "application/json",
+                "X-Csrf-Token": this.getCsrfToken()
+            })
+        });
+
+        fetch(request);
+    }
+
+    markPageAsRead() {
+        let items = this.getVisibleElements(".items .item");
+        let entryIDs = [];
+
+        items.forEach((element) => {
+            element.classList.add("item-status-read");
+            entryIDs.push(parseInt(element.dataset.id, 10));
+        });
+
+        if (entryIDs.length > 0) {
+            this.updateEntriesStatus(entryIDs, "read");
+        }
+
+        this.goToPage("next");
+    }
+
+    toggleEntryStatus() {
+        let currentItem = document.querySelector(".current-item");
+        if (currentItem !== null) {
+            let entryID = parseInt(currentItem.dataset.id, 10);
+            let statuses = {read: "unread", unread: "read"};
+
+            for (let currentStatus in statuses) {
+                let newStatus = statuses[currentStatus];
+
+                if (currentItem.classList.contains("item-status-" + currentStatus)) {
+                    this.goToNextListItem();
+
+                    currentItem.classList.remove("item-status-" + currentStatus);
+                    currentItem.classList.add("item-status-" + newStatus);
+
+                    this.updateEntriesStatus([entryID], newStatus);
+                    break;
+                }
+            }
+        }
+    }
+
+    openOriginalLink() {
+        let entryLink = document.querySelector(".entry h1 a");
+        if (entryLink !== null) {
+            this.openNewTab(entryLink.getAttribute("href"));
+            return;
+        }
+
+        let currentItemOriginalLink = document.querySelector(".current-item a[data-original-link]");
+        if (currentItemOriginalLink !== null) {
+            this.openNewTab(currentItemOriginalLink.getAttribute("href"));
+        }
+    }
+
+    openSelectedItem() {
+        let currentItemLink = document.querySelector(".current-item .item-title a");
+        if (currentItemLink !== null) {
+            window.location.href = currentItemLink.getAttribute("href");
+        }
+    }
+
+    goToPage(page) {
+        let element = document.querySelector("a[data-page=" + page + "]");
+
+        if (element) {
+            document.location.href = element.href;
+        }
+    }
+
+    goToPrevious() {
+        if (this.isListView()) {
+            this.goToPreviousListItem();
+        } else {
+            this.goToPage("previous");
+        }
+    }
+
+    goToNext() {
+        if (this.isListView()) {
+            this.goToNextListItem();
+        } else {
+            this.goToPage("next");
+        }
+    }
+
+    goToPreviousListItem() {
+        let items = this.getVisibleElements(".items .item");
+
+        if (items.length === 0) {
+            return;
+        }
+
+        if (document.querySelector(".current-item") === null) {
+            items[0].classList.add("current-item");
+            return;
+        }
+
+        for (let i = 0; i < items.length; i++) {
+            if (items[i].classList.contains("current-item")) {
+                items[i].classList.remove("current-item");
+
+                if (i - 1 >= 0) {
+                    items[i - 1].classList.add("current-item");
+                    this.scrollPageTo(items[i - 1]);
+                }
+
+                break;
+            }
+        }
+    }
+
+    goToNextListItem() {
+        let items = this.getVisibleElements(".items .item");
+
+        if (items.length === 0) {
+            return;
+        }
+
+        if (document.querySelector(".current-item") === null) {
+            items[0].classList.add("current-item");
+            return;
+        }
+
+        for (let i = 0; i < items.length; i++) {
+            if (items[i].classList.contains("current-item")) {
+                items[i].classList.remove("current-item");
+
+                if (i + 1 < items.length) {
+                    items[i + 1].classList.add("current-item");
+                    this.scrollPageTo(items[i + 1]);
+                }
+
+                break;
+            }
+        }
+    }
+
+    getVisibleElements(selector) {
+        let elements = document.querySelectorAll(selector);
+        let result = [];
+
+        for (let i = 0; i < elements.length; i++) {
+            if (this.isVisible(elements[i])) {
+                result.push(elements[i]);
+            }
+        }
+
+        return result;
+    }
+
+    isListView() {
+        return document.querySelector(".items") !== null;
+    }
+
+    scrollPageTo(item) {
+        let windowScrollPosition = window.pageYOffset;
+        let windowHeight = document.documentElement.clientHeight;
+        let viewportPosition = windowScrollPosition + windowHeight;
+        let itemBottomPosition = item.offsetTop + item.offsetHeight;
+
+        if (viewportPosition - itemBottomPosition < 0 || viewportPosition - item.offsetTop > windowHeight) {
+            window.scrollTo(0, item.offsetTop - 10);
+        }
+    }
+
+    openNewTab(url) {
+        let win = window.open(url, "_blank");
+        win.focus();
+    }
+
+    isVisible(element) {
+        return element.offsetParent !== null;
+    }
+
+    getCsrfToken() {
+        let element = document.querySelector("meta[name=X-CSRF-Token]");
+
+        if (element !== null) {
+            return element.getAttribute("value");
+        }
+
+        return "";
+    }
+}
+
+document.addEventListener("DOMContentLoaded", function() {
+    (new App()).run();
+});
+
+})();