X-Git-Url: https://gitweb.michael.orlitzky.com/?a=blobdiff_plain;f=index.html.in;h=633c0e4017edd0c070f9c1de13e9d2d627938b6d;hb=5986a05b37f3559ca7a548c99774fbab6bdcf24e;hp=9d666dedb0c5d6b9ea27df5bfcce6176db61dd9a;hpb=282eb1108fbfe6d1bc61bb49baefe3ee979d80b8;p=charm-bypass.git

diff --git a/index.html.in b/index.html.in
index 9d666de..633c0e4 100644
--- a/index.html.in
+++ b/index.html.in
@@ -229,40 +229,123 @@
     @SVGDATA@
 
     <script>
-      /******************************************/
-      /* First, set up the ticket date and time */
-      /******************************************/
-
-      /* There are two parameters, time and date, that we store in one
-       * underlying "date" variable. Default both to an hour and a
-       * half from now. This is what the CharmPass app does for
-       * one-way tickets.
-       */
-      const date = new Date();
-
-      /* Add an hour and a half. We use the low-level get/setTime to
-       * change the number of milliseconds since the epoch that this
-       * date represents. Obviously correct, and avoids all suspicious
-       * corner cases (well, for a few more decades). */
-      date.setTime(date.getTime() + (90*60*1000));
-
-      /* All <text> elements produced by inkscape contain a single <tspan>
-       * that itself contains the actual text. */
-      tt = document.getElementById("tickettime");
-      tt.firstChild.textContent = date.toLocaleTimeString();
-
-      const td = document.getElementById("ticketdate");
-      const dateopts = {
-	day: "2-digit",
-	month: "2-digit",
-	year: "2-digit"
-      };
-      td.firstChild.textContent = date.toLocaleDateString("en-US", dateopts);
-
-
-      /************************************************************/
-      /* Second, add the onclick handler for the night/day switch */
-      /************************************************************/
+
+      /***********************************************/
+      /* First, center the ticket within the browser */
+      /***********************************************/
+
+      function center_ticket() {
+	/* We're relying on the SVG being the full height of the
+	 * viewport already, and on the aspect ratio being
+	 * preserved. First, find the center of the ticket. */
+	const r = document.getElementById("ticket").getBoundingClientRect();
+	const c = r.left + (r.width / 2);
+
+	/* That's the center-line of the ticket. We want to move it to
+	 * the center-line of the viewport. */
+	const vc = document.documentElement.clientWidth / 2;
+
+	/* This is how much we need to translate the SVG */
+	const delta = vc - c;
+
+	/* But before we can set the absolute left-coordinate of the
+	 * SVG, we need to know where it is now. Note: without the
+	 * "px" this doesn't default to pixels like CSS does. */
+	const svg = document.querySelector("svg");
+	svg.style.left = (svg.getBoundingClientRect().left + delta) + "px";
+      }
+
+
+      /****************************************/
+      /* Set and reposition the security code */
+      /****************************************/
+
+      function set_code() {
+        /* All <text> elements produced by inkscape contain a single <tspan>
+         * that itself contains the actual text. This does something real
+         * sneaky, and actually OVERWRITES that tspan with our own text
+         * content. This turns out to be what we need anyway because trying
+         * to center a (display: inline) tspan is a pain in the butt. */
+        const ct = document.getElementById("codetext");
+
+        /* Get the "code" from the querystring if it's there */
+        let params = new URLSearchParams(document.location.search);
+        if (params.get("code")) {
+          ct.textContent = params.get("code");
+        }
+        else {
+          /* Otherwise, use a random code */
+          const bucket = ["0","1","2","3","4","5","6","7","8","9",
+                          "A","B","C","D","E","F","G","H","I","J",
+                          "K","L","M","N","O","P","Q","R","S","T",
+                          "U","V","W","X","Y","Z"];
+
+          /* Two random ints between 0 and 35 */
+          const i1 = Math.floor(Math.random() * 36);
+          const i2 = Math.floor(Math.random() * 36);
+          const d1 = bucket[i1];
+          const d2 = bucket[i2];
+          ct.textContent = d1 + d2;
+        }
+      }
+
+
+      function center_code() {
+        const ct = document.getElementById("codetext");
+
+        /* Now center the security code inside its red box */
+        /* First, find the center of the red box */
+        const r1 = document.getElementById("codebg").getBoundingClientRect();
+        const c1 = r1.left + (r1.width / 2);
+
+        /* Now the center of the code text */
+        const r2 = ct.getBoundingClientRect();
+        const c2 = r2.left + (r2.width / 2);
+
+        /* What do we add to c2 to make it equal to c1? */
+        const code_delta = c1 - c2;
+
+        /* Since this <text> element has an "x" attribute it's easier for
+         * us to shift that than it is to mess with the "left" style. */
+        ct.setAttribute("x", parseFloat(ct.getAttribute("x")) + code_delta);
+      }
+
+
+      /*****************************************/
+      /* Next, set up the ticket date and time */
+      /*****************************************/
+
+      function set_ticket_expiry() {
+        /* There are two parameters, time and date, that we store in one
+         * underlying "date" variable. Default both to an hour and a
+         * half from now. This is what the CharmPass app does for
+         * one-way tickets. */
+        const date = new Date();
+
+        /* Add an hour and a half. We use the low-level get/setTime to
+         * change the number of milliseconds since the epoch that this
+         * date represents. Obviously correct, and avoids all suspicious
+         * corner cases (well, for a few more decades). */
+        date.setTime(date.getTime() + (90*60*1000));
+
+        /* All <text> elements produced by inkscape contain a single <tspan>
+         * that itself contains the actual text. */
+        tt = document.getElementById("tickettime").firstChild;
+        tt.textContent = date.toLocaleTimeString();
+
+        const td = document.getElementById("ticketdate");
+        const dateopts = {
+          day: "2-digit",
+          month: "2-digit",
+          year: "2-digit"
+        };
+        td.textContent = date.toLocaleDateString("en-US", dateopts);
+      }
+
+
+      /*********************************************************/
+      /* Finally, the onclick handler for the night/day switch */
+      /*********************************************************/
 
       /* We always start in "day" mode */
       is_day = true;
@@ -286,38 +369,34 @@
 	}
       }
 
-      document.body.addEventListener("click", swap_colors);
 
+      /*****************************************************/
+      /* Add event handlers for all of the functions above */
+      /*****************************************************/
 
-      /*************************************************/
-      /* Finally, center the ticket within the browser */
-      /*************************************************/
-      function center_ticket() {
-	/* We're relying on the SVG being the full height of the
-	 * viewport already, and on the aspect ratio being
-	 * preserved. First, find the center of the ticket. */
-	const r = document.getElementById("ticket").getBoundingClientRect();
-	const c = r.left + (r.width / 2);
+      /* Center the ticket once when the page has loaded */
+      window.addEventListener("load", center_ticket);
 
-	/* That's the center-line of the ticket. We want to move it to
-	 * the center-line of the viewport. */
-	const vc = document.documentElement.clientWidth / 2;
+      /* Re-center the ticket when the window is resized */
+      window.addEventListener("resize", center_ticket);
 
-	/* This is how much we need to translate the SVG */
-	const delta = vc - c;
+      /* Set the security code text when the page has loaded */
+      window.addEventListener("load", set_code);
 
-	/* But before we can set the absolute left-coordinate of the
-	 * SVG, we need to know where it is now. Note: without the
-	 * "px" this doesn't default to pixels like CSS does. */
-	const svg = document.querySelector("svg");
-	svg.style.left = (svg.getBoundingClientRect().left + delta) + "px";
-      }
+     /* Center the security code text when the page has loaded;
+	in particular, after we set it */
+      window.addEventListener("load", center_code);
 
-      /* Re-center it when the window is resized */
-      window.addEventListener("resize", center_ticket);
+      /* Re-center the security code when the window is resized,
+	 and in particular after the ticket is re-centered */
+      window.addEventListener("resize", center_code);
+
+      /* Set the ticket expiration date/time upon page load */
+      window.addEventListener("load", set_ticket_expiry);
+
+      /* Swap colors when the screen is tapped */
+      document.body.addEventListener("click", swap_colors);
 
-      /* Center it once when the page has loaded, too */
-      window.addEventListener("load", center_ticket);
     </script>
   </body>
 </html>