1 files changed, 160 insertions, 0 deletions
diff --git a/hesla.ts b/hesla.ts
new file mode 100644
index 0000000..05e7f2f
--- /dev/null
+++ b/hesla.ts
@@ -0,0 +1,160 @@
+import {ActivePage} from "activePage";
+
+function toISODateString(date) {
+    function pad(n) {
+      return n < 10 ? '0' + n : n;
+    }
+
+    return date.getFullYear() + '-' + pad(date.getMonth() + 1) +
+      '-' + pad(date.getDate());
+}
+
+export class Hesla extends ActivePage {
+  public cur_section = null;
+  
+  constructor(appName?:string) {
+    super(appName);
+    this.cur_section = null;
+    document.getElementById("czech_nav").addEventListener("click",
+      (evt) => {
+        localStorage.setItem("language", "cs");
+        this.lang_reload();
+      }, false);
+
+    document.getElementById("german_nav").addEventListener("click",
+      (evt) => {
+        localStorage.setItem("language", "de");
+        this.lang_reload();
+      }, false);
+
+    // requires IE 10, Opera 12.10, Safari 7,
+    // FIXME Android browser requires 4.4 and has only
+    // webkitHidden and the event is webkitvisibilitychange
+    if (typeof document.hidden !== "undefined") {
+        document.addEventListener("visibilitychange",
+          (evt) => {
+            if (! document.hidden) {
+                this.today();
+            }
+          }, false);
+    }
+  }
+
+  /**
+   * react to the discovered distance of swipe
+   *
+   * @param distX Number distance in points in direction X
+   * @param distY Number distance in points in direction Y
+   *
+   * There is a preference for the horizontal swipe; if that doesn't
+   * happen (i.e., the distance travelled horizontally is less than
+   * negligible), then the vertical swipe (in either direction) means
+   * jump to today.
+   */
+  handle_move(distX, distY) {
+    var negligible = 100;
+    console.log('distX = ' + distX);
+    console.log('distY = ' + distY);
+
+    if (distX < -negligible) {
+      console.log("swipe left");
+      this.next();
+    }
+    else if (distX > negligible) {
+      console.log("swipe right");
+      this.prev();
+    }
+  }
+
+  // cur_watchword is actually just a virtual property, which is not stored anywhere and its
+  // accessor methods change the value of the cur_section property instead.
+  get cur_watchword() {
+    console.log(`this.cur_section = ${this.cur_section}`);
+    if (!this.cur_section) {
+        this.cur_section = new Date();
+    }
+
+    return this.cur_section;
+  }
+
+  set cur_watchword(value) {
+    // Remove 'visible' style from the currently displayed psalm, if
+    // there is any
+
+    this.cur_section = value;
+
+    // set the parameter directly to avoid call to getter.
+    console.log('Displaying ' + this.cur_section);
+    this.display();
+  }
+
+  /**
+   * Display losungen for given day
+   *
+   * Displays the Losungen for the given date (or today if not defined)
+   */
+  display() {
+    super.display();
+
+    console.log("cur_watchword = " + toISODateString(this.cur_watchword));
+    document.getElementById(toISODateString(this.cur_watchword)).
+      classList.add("visible");
+
+    window.scroll(0, 0);
+  }
+
+  today() {
+    console.log("jump to today!");
+    this.cur_watchword = new Date();
+    this.display();
+  }
+
+  shiftDate(shift) {
+    var cur_date = this.cur_watchword;
+    cur_date.setDate(cur_date.getDate() + shift);
+    this.cur_watchword = cur_date;
+  }
+
+  next() {
+    console.log("Next day!");
+    this.shiftDate(+1);
+  }
+
+  prev() {
+    console.log("Previous day!");
+    this.shiftDate(-1);
+  }
+
+  // Switch langauge
+  /**
+   * Handler for the switch language event
+   *
+   * Switches the displayed langauge page according to the state stored
+   * in the localStorage.langauge variable which contains ISO code for
+   * the chosen language ('de' and 'cs' currently).
+   */
+  lang_reload() {
+    var new_basename = "index.html", new_url = window.location.href,
+      old_basename = window.location.pathname.split("/").slice(-1)[0];
+    console.log('old_basename = ' + old_basename);
+
+    if (localStorage.getItem("language") &&
+        (localStorage.getItem("language") === "de")) {
+      new_basename = "index_de.html";
+    }
+
+    console.log('new_basename = ' + new_basename);
+    if ((old_basename !== new_basename) || (window.location.pathname.length === 0)) {
+      new_url = window.location.href.replace(/(index[-\w]*\.html)?$/,
+        new_basename);
+    }
+
+    if (window.location.href !== new_url) {
+      window.location.assign(new_url);
+    }
+  }
+}
+
+var thisHesla = new Hesla();
+thisHesla.lang_reload();
+thisHesla.display();