Undo for task creation and reordering

[vopamoi] / vopamoi.ts

diff --git a/vopamoi.ts b/vopamoi.ts
index fe3d491630f9e5781bdc7ba62f2f6ee0ad731b7e..a88408f639f3c8663ff16d92f38c4476741d93a3 100644 (file)
--- a/vopamoi.ts
+++ b/vopamoi.ts
@@ -14,7 +14,7 @@ function splitN(str: string, delimiter: string, limit: number = MAX_SAFE_INTEGER
 }
 
 const Model = {
-  addTask: function (timestamp: string, description: string) {
+  addTask: function (timestamp: string, description: string): Element {
     const task = document.createElement("div");
     task.appendChild(document.createTextNode(description));
     task.setAttribute("class", "task");
@@ -22,13 +22,7 @@ const Model = {
     task.setAttribute("data-created", timestamp);
     document.getElementById("tasks")!.appendChild(task);
     task.focus();
-  },
-
-  destroyTask: function (createTimestamp: string) {
-    const task = this.getTask(createTimestamp);
-    if (task) {
-      task.parentElement!.removeChild(task);
-    }
+    return task;
   },
 
   getPriority: function (task: Element): number {
@@ -46,19 +40,20 @@ const Model = {
     }
   },
 
-  setPriority: function (createTimestamp: string, priority: number) {
+  setPriority: function (createTimestamp: string, priority: number): Element | null {
     const target = this.getTask(createTimestamp);
-    if (!target) return;
+    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);
         target instanceof HTMLElement && target.focus();
-        return;
+        return target;
       }
     }
     document.getElementById("tasks")!.appendChild(target);
     target instanceof HTMLElement && target.focus();
+    return target;
   },
 
   setState: function (stateTimestamp: string, createTimestamp: string, state: string) {
@@ -78,18 +73,15 @@ function Log(prefix: string = "vp-") {
     apply: function (entry: string) {
       const [timestamp, command, data] = splitN(entry, " ", 2);
       if (command == "Create") {
-        Model.addTask(timestamp, data);
-      }
-      if (command == "Destroy") {
-        Model.destroyTask(data.split(" ", 1)[0]);
+        return Model.addTask(timestamp, data);
       }
       if (command == "State") {
         const [createTimestamp, state] = splitN(data, " ", 1);
-        Model.setState(timestamp, createTimestamp, state);
+        return Model.setState(timestamp, createTimestamp, state);
       }
       if (command == "Priority") {
         const [createTimestamp, newPriority] = splitN(data, " ", 1);
-        Model.setPriority(createTimestamp, parseFloat(newPriority));
+        return Model.setPriority(createTimestamp, parseFloat(newPriority));
       }
     },
 
@@ -99,7 +91,7 @@ function Log(prefix: string = "vp-") {
 
     recordAndApply: function (entry: string) {
       this.record(entry);
-      this.apply(entry);
+      return this.apply(entry);
     },
 
     replay: function () {
@@ -116,37 +108,49 @@ function Log(prefix: string = "vp-") {
 }
 const log = Log();
 
+const undoLog: string[] = [];
+
 const UI = {
-  addTask: function (description: string) {
-    log.recordAndApply(`${Date.now()} Create ${description}`);
-  },
-  destroyTask: function (createTimestamp: string) {
-    log.recordAndApply(`${Date.now()} Destroy ${createTimestamp} ${Model.getTask(createTimestamp)?.textContent}`);
+  addTask: function (description: string): Element {
+    const now = Date.now();
+    undoLog.push(`State ${now} deleted`);
+    return <Element>log.recordAndApply(`${now} Create ${description}`);
   },
-  setPriority: function (createTimestamp: string, priority: number) {
-    log.recordAndApply(`${Date.now()} Priority ${createTimestamp} ${priority}`);
+  setPriority: function (createTimestamp: string, newPriority: number, oldPriority: number) {
+    undoLog.push(`Priority ${createTimestamp} ${oldPriority}`);
+    return log.recordAndApply(`${Date.now()} Priority ${createTimestamp} ${newPriority}`);
   },
   setState: function (createTimestamp: string, state: string) {
-    log.recordAndApply(`${Date.now()} State ${createTimestamp} ${state}`);
+    return log.recordAndApply(`${Date.now()} State ${createTimestamp} ${state}`);
+  },
+  undo: function () {
+    if (undoLog.length > 0) {
+      return log.recordAndApply(`${Date.now()} ${undoLog.pop()}`);
+    }
   },
 };
 
 const BrowserUI = {
-  addTask: function () {
+  addTask: function (event: KeyboardEvent) {
     const input = <HTMLInputElement>document.getElementById("taskName");
     if (input.value) {
-      UI.addTask(input.value);
+      const task = UI.addTask(input.value);
       input.value = "";
+      if (event.getModifierState("Control")) {
+        this.setPriority(task, null, document.getElementsByClassName("task")[0]);
+      }
     }
   },
 
-  destroyTask: function () {
-    const createTimestamp = document.activeElement?.getAttribute("data-created");
-    this.moveCursor(1) || this.moveCursor(-1);
-    return UI.destroyTask(createTimestamp!);
+  firstVisibleTask: function () {
+    for (const task of document.getElementsByClassName("task")) {
+      if (task instanceof HTMLElement && task.style.display !== "none") {
+        return task;
+      }
+    }
   },
 
-  focusTaskNameInput: function (event: any) {
+  focusTaskNameInput: function (event: Event) {
     document.getElementById("taskName")!.focus();
     event.preventDefault();
   },
@@ -202,7 +206,7 @@ const BrowserUI = {
     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);
+    UI.setPriority(task.getAttribute("data-created")!, okToRound ? newPriorityRounded : newPriority, Model.getPriority(task));
   },
 
   setState: function (state: string) {
@@ -210,11 +214,16 @@ const BrowserUI = {
     this.moveCursor(1) || this.moveCursor(-1);
     return UI.setState(createTimestamp!, state);
   },
+
+  undo: function () {
+    const ret = UI.undo();
+    if (ret && ret instanceof HTMLElement) ret.focus();
+  },
 };
 
 function handleKey(event: any) {
   if (event.target.tagName === "INPUT") {
-    if (event.key == "Enter") return BrowserUI.addTask();
+    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);
@@ -225,11 +234,13 @@ function handleKey(event: any) {
     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 == "X") return BrowserUI.destroyTask();
+    if (event.key == "X") return BrowserUI.setState("deleted");
+    if (event.key == "u") return BrowserUI.undo();
   }
 }
 
 function browserInit() {
   document.body.addEventListener("keydown", handleKey, { capture: false });
   log.replay();
+  BrowserUI.firstVisibleTask()?.focus();
 }