git.scottworley.com Git - vopamoi/blob - vopamoi.ts

   1 // Typescript doesn't know about MAX_SAFE_INTEGER??  This was supposed to be
   2 // fixed in typescript 2.0.1 in 2016, but is not working for me in typescript
   3 // 4.2.4 in 2022.  :( https://github.com/microsoft/TypeScript/issues/9937
   4 //const MAX_SAFE_INTEGER = Number.MAX_SAFE_INTEGER;
   5 const MAX_SAFE_INTEGER = 9007199254740991;
   6
   7 // A sane split that splits N *times*, leaving the last chunk unsplit.
   8 function splitN(str: string, delimiter: string, limit: number = MAX_SAFE_INTEGER): string[] {
   9   if (limit < 1) {
  10     return [str];
  11   }
  12   const at = str.indexOf(delimiter);
  13   return at === -1 ? [str] : [str.substring(0, at)].concat(splitN(str.substring(at + delimiter.length), delimiter, limit - 1));
  14 }
  15
  16 const Model = {
  17   addTask: function (timestamp: string, description: string): Element {
  18     const task = document.createElement("div");
  19     task.appendChild(document.createTextNode(description));
  20     task.setAttribute("class", "task");
  21     task.setAttribute("tabindex", "0");
  22     task.setAttribute("data-created", timestamp);
  23     document.getElementById("tasks")!.appendChild(task);
  24     task.focus();
  25     return task;
  26   },
  27
  28   getPriority: function (task: Element): number {
  29     if (task.hasAttribute("data-priority")) {
  30       return parseFloat(task.getAttribute("data-priority")!);
  31     }
  32     return parseFloat(task.getAttribute("data-created")!);
  33   },
  34
  35   getTask: function (createTimestamp: string) {
  36     for (const task of document.getElementsByClassName("task")) {
  37       if (task.getAttribute("data-created") === createTimestamp) {
  38         return task;
  39       }
  40     }
  41   },
  42
  43   setPriority: function (createTimestamp: string, priority: number): Element | null {
  44     const target = this.getTask(createTimestamp);
  45     if (!target) return null;
  46     target.setAttribute("data-priority", `${priority}`);
  47     for (const task of document.getElementsByClassName("task")) {
  48       if (task !== target && this.getPriority(task) > priority) {
  49         task.parentElement!.insertBefore(target, task);
  50         target instanceof HTMLElement && target.focus();
  51         return target;
  52       }
  53     }
  54     document.getElementById("tasks")!.appendChild(target);
  55     target instanceof HTMLElement && target.focus();
  56     return target;
  57   },
  58
  59   setState: function (stateTimestamp: string, createTimestamp: string, state: string) {
  60     const task = this.getTask(createTimestamp);
  61     if (task) {
  62       task.setAttribute(`data-${state}`, stateTimestamp);
  63       if (task instanceof HTMLElement) {
  64         task.style.display = "none"; // Until view filtering
  65       }
  66     }
  67   },
  68 };
  69
  70 function Log(prefix: string = "vp-") {
  71   var next_log_index = 0;
  72   return {
  73     apply: function (entry: string) {
  74       const [timestamp, command, data] = splitN(entry, " ", 2);
  75       if (command == "Create") {
  76         return Model.addTask(timestamp, data);
  77       }
  78       if (command == "State") {
  79         const [createTimestamp, state] = splitN(data, " ", 1);
  80         return Model.setState(timestamp, createTimestamp, state);
  81       }
  82       if (command == "Priority") {
  83         const [createTimestamp, newPriority] = splitN(data, " ", 1);
  84         return Model.setPriority(createTimestamp, parseFloat(newPriority));
  85       }
  86     },
  87
  88     record: function (entry: string) {
  89       window.localStorage.setItem(`${prefix}${next_log_index++}`, entry);
  90     },
  91
  92     recordAndApply: function (entry: string) {
  93       this.record(entry);
  94       return this.apply(entry);
  95     },
  96
  97     replay: function () {
  98       while (true) {
  99         const entry = window.localStorage.getItem(`${prefix}${next_log_index}`);
 100         if (entry === null) {
 101           break;
 102         }
 103         this.apply(entry);
 104         next_log_index++;
 105       }
 106     },
 107   };
 108 }
 109 const log = Log();
 110
 111 const undoLog: string[] = [];
 112
 113 const UI = {
 114   addTask: function (description: string): Element {
 115     const now = Date.now();
 116     undoLog.push(`State ${now} deleted`);
 117     return <Element>log.recordAndApply(`${now} Create ${description}`);
 118   },
 119   setPriority: function (createTimestamp: string, newPriority: number, oldPriority: number) {
 120     undoLog.push(`Priority ${createTimestamp} ${oldPriority}`);
 121     return log.recordAndApply(`${Date.now()} Priority ${createTimestamp} ${newPriority}`);
 122   },
 123   setState: function (createTimestamp: string, state: string) {
 124     return log.recordAndApply(`${Date.now()} State ${createTimestamp} ${state}`);
 125   },
 126   undo: function () {
 127     if (undoLog.length > 0) {
 128       return log.recordAndApply(`${Date.now()} ${undoLog.pop()}`);
 129     }
 130   },
 131 };
 132
 133 const BrowserUI = {
 134   addTask: function (event: KeyboardEvent) {
 135     const input = <HTMLInputElement>document.getElementById("taskName");
 136     if (input.value) {
 137       const task = UI.addTask(input.value);
 138       input.value = "";
 139       if (event.getModifierState("Control")) {
 140         this.setPriority(task, null, document.getElementsByClassName("task")[0]);
 141       }
 142     }
 143   },
 144
 145   firstVisibleTask: function () {
 146     for (const task of document.getElementsByClassName("task")) {
 147       if (task instanceof HTMLElement && task.style.display !== "none") {
 148         return task;
 149       }
 150     }
 151   },
 152
 153   focusTaskNameInput: function (event: Event) {
 154     document.getElementById("taskName")!.focus();
 155     event.preventDefault();
 156   },
 157
 158   visibleTaskAtOffset(task: Element, offset: number): Element {
 159     var cursor: Element | null = task;
 160     var valid_cursor = cursor;
 161     const increment = offset / Math.abs(offset);
 162     while (true) {
 163       cursor = increment > 0 ? cursor.nextElementSibling : cursor.previousElementSibling;
 164       if (!cursor || !(cursor instanceof HTMLElement)) break;
 165       if (cursor.style.display !== "none") {
 166         offset -= increment;
 167         valid_cursor = cursor;
 168       }
 169       if (Math.abs(offset) < 0.5) break;
 170     }
 171     return valid_cursor;
 172   },
 173
 174   moveCursor: function (offset: number): boolean {
 175     const active = document.activeElement;
 176     if (!active) return false;
 177     const dest = this.visibleTaskAtOffset(active, offset);
 178     if (dest !== active && dest instanceof HTMLElement) {
 179       dest.focus();
 180       return true;
 181     }
 182     return false;
 183   },
 184
 185   moveTask: function (offset: number) {
 186     const active = document.activeElement;
 187     if (!active) return;
 188     const dest = this.visibleTaskAtOffset(active, offset);
 189     if (dest === active) return; // Already extremal
 190     var onePastDest: Element | null = this.visibleTaskAtOffset(dest, offset / Math.abs(offset));
 191     if (onePastDest == dest) onePastDest = null; // Will become extremal
 192     if (offset > 0) {
 193       this.setPriority(active, dest, onePastDest);
 194     } else {
 195       this.setPriority(active, onePastDest, dest);
 196     }
 197   },
 198
 199   // Change task's priority to be between other tasks a and b.
 200   setPriority: function (task: Element, a: Element | null, b: Element | null) {
 201     const aPriority = a === null ? 0 : Model.getPriority(a);
 202     const bPriority = b === null ? Date.now() : Model.getPriority(b);
 203     console.assert(aPriority < bPriority, aPriority, "<", bPriority);
 204     const span = bPriority - aPriority;
 205     const newPriority = aPriority + 0.1 * span + 0.8 * span * Math.random();
 206     console.assert(aPriority < newPriority && newPriority < bPriority, aPriority, "<", newPriority, "<", bPriority);
 207     const newPriorityRounded = Math.round(newPriority);
 208     const okToRound = aPriority < newPriorityRounded && newPriorityRounded < bPriority;
 209     UI.setPriority(task.getAttribute("data-created")!, okToRound ? newPriorityRounded : newPriority, Model.getPriority(task));
 210   },
 211
 212   setState: function (state: string) {
 213     const createTimestamp = document.activeElement?.getAttribute("data-created");
 214     this.moveCursor(1) || this.moveCursor(-1);
 215     return UI.setState(createTimestamp!, state);
 216   },
 217
 218   undo: function () {
 219     const ret = UI.undo();
 220     if (ret && ret instanceof HTMLElement) ret.focus();
 221   },
 222 };
 223
 224 function handleKey(event: any) {
 225   if (event.target.tagName === "INPUT") {
 226     if (event.key == "Enter") return BrowserUI.addTask(event);
 227   } else {
 228     if (event.key == "j") return BrowserUI.moveCursor(1);
 229     if (event.key == "k") return BrowserUI.moveCursor(-1);
 230     if (event.key == "J") return BrowserUI.moveTask(1);
 231     if (event.key == "K") return BrowserUI.moveTask(-1);
 232     if (event.key == "n") return BrowserUI.focusTaskNameInput(event);
 233     if (event.key == "s") return BrowserUI.setState("someday-maybe");
 234     if (event.key == "w") return BrowserUI.setState("waiting");
 235     if (event.key == "d") return BrowserUI.setState("done");
 236     if (event.key == "c") return BrowserUI.setState("cancelled");
 237     if (event.key == "X") return BrowserUI.setState("deleted");
 238     if (event.key == "u") return BrowserUI.undo();
 239   }
 240 }
 241
 242 function browserInit() {
 243   document.body.addEventListener("keydown", handleKey, { capture: false });
 244   log.replay();
 245   BrowserUI.firstVisibleTask()?.focus();
 246 }