Don't change state if it's already in that state

[vopamoi] / vopamoi.ts

diff --git a/vopamoi.ts b/vopamoi.ts
index 5967c7d909136eab3975fa042304f96d413105fe..e997d1c38c8572ed5f60dfe7c5828c4bf5979958 100644 (file)
--- a/vopamoi.ts
+++ b/vopamoi.ts
@@ -1,23 +1,255 @@
-var tasks: string[] = [];
+// 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;

 
 

-function createViewTask(task: string) {
-  const viewTask = document.createElement("div");
-  viewTask.appendChild(document.createTextNode(task));
-  viewTask.setAttribute("tabindex", "0");
-  return viewTask;
+// 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 updateView() {
-  tasks.forEach((t) => document.getElementById(t) || document.body.appendChild(createViewTask(t)));
+const Model = {
+  addTask: function (timestamp: string, description: string): Element {
+    const task = document.createElement("div");
+    task.appendChild(document.createTextNode(description));
+    task.setAttribute("class", "task");
+    task.setAttribute("tabindex", "0");
+    task.setAttribute("data-created", timestamp);
+    document.getElementById("tasks")!.appendChild(task);
+    return task;
+  },
+
+  getPriority: function (task: Element): number {
+    if (task.hasAttribute("data-priority")) {
+      return parseFloat(task.getAttribute("data-priority")!);
+    }
+    return parseFloat(task.getAttribute("data-created")!);
+  },
+
+  getState: function (task: Element): string {
+    return task.getAttribute("data-state") ?? "todo";
+  },
+
+  getTask: function (createTimestamp: string) {
+    for (const task of document.getElementsByClassName("task")) {
+      if (task.getAttribute("data-created") === createTimestamp) {
+        return task;
+      }
+    }
+  },
+
+  setPriority: function (createTimestamp: string, priority: number): Element | null {
+    const target = this.getTask(createTimestamp);
+    if (!target) return null;
+    target.setAttribute("data-priority", `${priority}`);
+    for (const task of document.getElementsByClassName("task")) {
+      if (task !== target && this.getPriority(task) > priority) {
+        task.parentElement!.insertBefore(target, task);
+        return target;
+      }
+    }
+    document.getElementById("tasks")!.appendChild(target);
+    return target;
+  },
+
+  setState: function (stateTimestamp: string, createTimestamp: string, state: string) {
+    const task = this.getTask(createTimestamp);
+    if (task) {
+      task.setAttribute("data-state", state);
+      if (task instanceof HTMLElement) {
+        task.style.display = state == "todo" ? "block" : "none"; // Until view filtering
+      }
+    }
+  },
+};
+
+function Log(prefix: string = "vp-") {
+  var next_log_index = 0;
+  return {
+    apply: function (entry: string) {
+      const [timestamp, command, data] = splitN(entry, " ", 2);
+      if (command == "Create") {
+        return Model.addTask(timestamp, data);
+      }
+      if (command == "State") {
+        const [createTimestamp, state] = splitN(data, " ", 1);
+        return Model.setState(timestamp, createTimestamp, state);
+      }
+      if (command == "Priority") {
+        const [createTimestamp, newPriority] = splitN(data, " ", 1);
+        return Model.setPriority(createTimestamp, parseFloat(newPriority));
+      }
+    },
+
+    record: function (entry: string) {
+      window.localStorage.setItem(`${prefix}${next_log_index++}`, entry);
+    },
+
+    recordAndApply: function (entry: string) {
+      this.record(entry);
+      return this.apply(entry);
+    },
+
+    replay: function () {
+      while (true) {
+        const entry = window.localStorage.getItem(`${prefix}${next_log_index}`);
+        if (entry === null) {
+          break;
+        }
+        this.apply(entry);
+        next_log_index++;
+      }
+    },
+  };

 }
 }

+const log = Log();
+
+const undoLog: string[] = [];
+
+const UI = {
+  addTask: function (description: string): Element {
+    const now = Date.now();
+    undoLog.push(`State ${now} deleted`);
+    return <Element>log.recordAndApply(`${now} Create ${description}`);
+  },
+  setPriority: function (createTimestamp: string, newPriority: number, oldPriority: number) {
+    undoLog.push(`Priority ${createTimestamp} ${oldPriority}`);
+    return log.recordAndApply(`${Date.now()} Priority ${createTimestamp} ${newPriority}`);
+  },
+  setState: function (createTimestamp: string, newState: string, oldState: string) {
+    undoLog.push(`State ${createTimestamp} ${oldState}`);
+    return log.recordAndApply(`${Date.now()} State ${createTimestamp} ${newState}`);
+  },
+  undo: function () {
+    if (undoLog.length > 0) {
+      return log.recordAndApply(`${Date.now()} ${undoLog.pop()}`);
+    }
+  },
+};
+
+const BrowserUI = {
+  addTask: function (event: KeyboardEvent) {
+    const input = <HTMLInputElement>document.getElementById("taskName");
+    if (input.value) {
+      const task = UI.addTask(input.value);
+      if (task && task instanceof HTMLElement) task.focus();
+      input.value = "";
+      if (event.getModifierState("Control")) {
+        this.setPriority(task, null, document.getElementsByClassName("task")[0]);
+      }
+    }
+  },
+
+  firstVisibleTask: function () {
+    for (const task of document.getElementsByClassName("task")) {
+      if (task instanceof HTMLElement && task.style.display !== "none") {
+        return task;
+      }
+    }
+  },
+
+  focusTaskNameInput: function (event: Event) {
+    document.getElementById("taskName")!.focus();
+    event.preventDefault();
+  },
+
+  visibleTaskAtOffset(task: Element, offset: number): Element {
+    var cursor: Element | null = task;
+    var valid_cursor = cursor;
+    const increment = offset / Math.abs(offset);
+    while (true) {
+      cursor = increment > 0 ? cursor.nextElementSibling : cursor.previousElementSibling;
+      if (!cursor || !(cursor instanceof HTMLElement)) break;
+      if (cursor.style.display !== "none") {
+        offset -= increment;
+        valid_cursor = cursor;
+      }
+      if (Math.abs(offset) < 0.5) break;
+    }
+    return valid_cursor;
+  },
+
+  moveCursor: function (offset: number): boolean {
+    const active = document.activeElement;
+    if (!active) return false;
+    const dest = this.visibleTaskAtOffset(active, offset);
+    if (dest !== active && dest instanceof HTMLElement) {
+      dest.focus();
+      return true;
+    }
+    return false;
+  },
+
+  moveTask: function (offset: number) {
+    const active = document.activeElement;
+    if (!active) return;
+    const dest = this.visibleTaskAtOffset(active, offset);
+    if (dest === active) return; // Already extremal
+    var onePastDest: Element | null = this.visibleTaskAtOffset(dest, offset / Math.abs(offset));
+    if (onePastDest == dest) onePastDest = null; // Will become extremal
+    if (offset > 0) {
+      this.setPriority(active, dest, onePastDest);
+    } else {
+      this.setPriority(active, onePastDest, dest);
+    }
+  },
+
+  // Change task's priority to be between other tasks a and b.
+  setPriority: function (task: Element, a: Element | null, b: Element | null) {
+    const aPriority = a === null ? 0 : Model.getPriority(a);
+    const bPriority = b === null ? Date.now() : Model.getPriority(b);
+    console.assert(aPriority < bPriority, aPriority, "<", bPriority);
+    const span = bPriority - aPriority;
+    const newPriority = aPriority + 0.1 * span + 0.8 * span * Math.random();
+    console.assert(aPriority < newPriority && newPriority < bPriority, aPriority, "<", newPriority, "<", bPriority);
+    const newPriorityRounded = Math.round(newPriority);
+    const okToRound = aPriority < newPriorityRounded && newPriorityRounded < bPriority;
+    UI.setPriority(task.getAttribute("data-created")!, okToRound ? newPriorityRounded : newPriority, Model.getPriority(task));
+    task instanceof HTMLElement && task.focus();
+  },
+
+  setState: function (newState: string) {
+    const task = document.activeElement;
+    if (!task) return;
+    const oldState = Model.getState(task);
+    if (newState === oldState) return;
+    const createTimestamp = task.getAttribute("data-created")!;
+    this.moveCursor(1) || this.moveCursor(-1);
+    return UI.setState(createTimestamp, newState, oldState);
+  },
+
+  undo: function () {
+    const ret = UI.undo();
+    if (ret && ret instanceof HTMLElement) ret.focus();
+  },
+};

 
 

-function addTask(task: string) {
-  tasks.push(task);
-  updateView();
+function handleKey(event: any) {
+  if (event.target.tagName === "INPUT") {
+    if (event.key == "Enter") return BrowserUI.addTask(event);
+  } else {
+    if (event.key == "j") return BrowserUI.moveCursor(1);
+    if (event.key == "k") return BrowserUI.moveCursor(-1);
+    if (event.key == "J") return BrowserUI.moveTask(1);
+    if (event.key == "K") return BrowserUI.moveTask(-1);
+    if (event.key == "n") return BrowserUI.focusTaskNameInput(event);
+    if (event.key == "s") return BrowserUI.setState("someday-maybe");
+    if (event.key == "w") return BrowserUI.setState("waiting");
+    if (event.key == "d") return BrowserUI.setState("done");
+    if (event.key == "c") return BrowserUI.setState("cancelled");
+    if (event.key == "t") return BrowserUI.setState("todo");
+    if (event.key == "X") return BrowserUI.setState("deleted");
+    if (event.key == "u") return BrowserUI.undo();
+  }

 }
 
 }
 

-function browserCreateTask(form: any) {
-  addTask(form.taskName.value);
-  form.taskName.value = "";
-  return false;
+function browserInit() {
+  document.body.addEventListener("keydown", handleKey, { capture: false });
+  log.replay();
+  BrowserUI.firstVisibleTask()?.focus();

 }
 }