Build and consume Log entries

[vopamoi] / vopamoi.ts

diff --git a/vopamoi.ts b/vopamoi.ts
index cfa118695c4f82c00b113e605b522710eac07489..6cfdbf2d2f645a4ac24afd3554ea7455ce179ba3 100644 (file)
--- a/vopamoi.ts
+++ b/vopamoi.ts
@@ -1,16 +1,74 @@
-function createTask(description: string) {
-  const task = document.createElement("div");
-  task.appendChild(document.createTextNode(description));
-  task.setAttribute("tabindex", "0");
-  return task;
+// Typescript doesn't know about MAX_SAFE_INTEGER??  This was supposed to be
+// fixed in typescript 2.0.1 in 2016, but is not working for me in typescript
+// 4.2.4 in 2022.  :( https://github.com/microsoft/TypeScript/issues/9937
+//const MAX_SAFE_INTEGER = Number.MAX_SAFE_INTEGER;
+const MAX_SAFE_INTEGER = 9007199254740991;
+
+// A sane split that splits N *times*, leaving the last chunk unsplit.
+function splitN(str: string, delimiter: string, limit: number = MAX_SAFE_INTEGER): string[] {
+  if (limit < 1) {
+    return [str];
+  }
+  const at = str.indexOf(delimiter);
+  return at === -1 ? [str] : [str.substring(0, at)].concat(splitN(str.substring(at + delimiter.length), delimiter, limit - 1));
 }
 
-function addTask(description: string) {
-  document.body.appendChild(createTask(description));
+const Model = {
+  createTask: function (description: string) {
+    const task = document.createElement("div");
+    task.appendChild(document.createTextNode(description));
+    task.setAttribute("tabindex", "0");
+    return task;
+  },
+
+  addTask: function (description: string) {
+    document.body.appendChild(this.createTask(description)).focus();
+  },
+
+  moveCursor: function (offset: number) {
+    var active = document.activeElement;
+    if (offset === 1 && active) {
+      active = active.nextElementSibling;
+    }
+    if (offset === -1 && active) {
+      active = active.previousElementSibling;
+    }
+    if (active && active instanceof HTMLElement) active.focus();
+  },
+};
+
+const Log = {
+  addTask: function (description: string) {
+    this.applyLogEntry(`${Date.now()} Create ${description}`);
+  },
+
+  applyLogEntry: function (entry: string) {
+    const [timestamp, command, data] = splitN(entry, " ", 2);
+    if (command == "Create") {
+      Model.addTask(data);
+    }
+  },
+};
+
+function handleKey(event: any) {
+  if (event.target.tagName !== "INPUT") {
+    if (event.key == "j") Model.moveCursor(1);
+    if (event.key == "k") Model.moveCursor(-1);
+    if (event.key == "c") {
+      document.getElementById("taskName")!.focus();
+      event.preventDefault();
+    }
+  }
 }
 
 function browserCreateTask(form: any) {
-  addTask(form.taskName.value);
+  if (form.taskName.value) {
+    Log.addTask(form.taskName.value);
+  }
   form.taskName.value = "";
   return false;
 }
+
+function browserInit() {
+  document.body.addEventListener("keydown", handleKey, { capture: false });
+}