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     return task;
  25   },
  26
  27   getPriority: function (task: Element): number {
  28     if (task.hasAttribute("data-priority")) {
  29       return parseFloat(task.getAttribute("data-priority")!);
  30     }
  31     return parseFloat(task.getAttribute("data-created")!);
  32   },
  33
  34   getState: function (task: Element): string {
  35     return task.getAttribute("data-state") ?? "todo";
  36   },
  37
  38   getTask: function (createTimestamp: string) {
  39     for (const task of document.getElementsByClassName("task")) {
  40       if (task.getAttribute("data-created") === createTimestamp) {
  41         return task;
  42       }
  43     }
  44   },
  45
  46   setPriority: function (createTimestamp: string, priority: number): Element | null {
  47     const target = this.getTask(createTimestamp);
  48     if (!target) return null;
  49     target.setAttribute("data-priority", `${priority}`);
  50     for (const task of document.getElementsByClassName("task")) {
  51       if (task !== target && this.getPriority(task) > priority) {
  52         task.parentElement!.insertBefore(target, task);
  53         return target;
  54       }
  55     }
  56     document.getElementById("tasks")!.appendChild(target);
  57     return target;
  58   },
  59
  60   setState: function (stateTimestamp: string, createTimestamp: string, state: string) {
  61     const task = this.getTask(createTimestamp);
  62     if (task) {
  63       task.setAttribute("data-state", state);
  64       if (task instanceof HTMLElement) {
  65         task.style.display = state == "todo" ? "block" : "none"; // Until view filtering
  66       }
  67     }
  68   },
  69 };
  70
  71 function Log(prefix: string = "vp-") {
  72   var next_log_index = 0;
  73   return {
  74     apply: function (entry: string) {
  75       const [timestamp, command, data] = splitN(entry, " ", 2);
  76       if (command == "Create") {
  77         return Model.addTask(timestamp, data);
  78       }
  79       if (command == "State") {
  80         const [createTimestamp, state] = splitN(data, " ", 1);
  81         return Model.setState(timestamp, createTimestamp, state);
  82       }
  83       if (command == "Priority") {
  84         const [createTimestamp, newPriority] = splitN(data, " ", 1);
  85         return Model.setPriority(createTimestamp, parseFloat(newPriority));
  86       }
  87     },
  88
  89     record: function (entry: string) {
  90       window.localStorage.setItem(`${prefix}${next_log_index++}`, entry);
  91     },
  92
  93     recordAndApply: function (entry: string) {
  94       this.record(entry);
  95       return this.apply(entry);
  96     },
  97
  98     replay: function () {
  99       while (true) {
 100         const entry = window.localStorage.getItem(`${prefix}${next_log_index}`);
 101         if (entry === null) {
 102           break;
 103         }
 104         this.apply(entry);
 105         next_log_index++;
 106       }
 107     },
 108   };
 109 }
 110 const log = Log();
 111
 112 const undoLog: string[] = [];
 113
 114 const UI = {
 115   addTask: function (description: string): Element {
 116     const now = Date.now();
 117     undoLog.push(`State ${now} deleted`);
 118     return <Element>log.recordAndApply(`${now} Create ${description}`);
 119   },
 120   setPriority: function (createTimestamp: string, newPriority: number, oldPriority: number) {
 121     undoLog.push(`Priority ${createTimestamp} ${oldPriority}`);
 122     return log.recordAndApply(`${Date.now()} Priority ${createTimestamp} ${newPriority}`);
 123   },
 124   setState: function (createTimestamp: string, newState: string, oldState: string) {
 125     undoLog.push(`State ${createTimestamp} ${oldState}`);
 126     return log.recordAndApply(`${Date.now()} State ${createTimestamp} ${newState}`);
 127   },
 128   undo: function () {
 129     if (undoLog.length > 0) {
 130       return log.recordAndApply(`${Date.now()} ${undoLog.pop()}`);
 131     }
 132   },
 133 };
 134
 135 const BrowserUI = {
 136   addTask: function (event: KeyboardEvent) {
 137     const input = <HTMLInputElement>document.getElementById("taskName");
 138     if (input.value) {
 139       const task = UI.addTask(input.value);
 140       if (task && task instanceof HTMLElement) task.focus();
 141       input.value = "";
 142       if (event.getModifierState("Control")) {
 143         this.setPriority(task, null, document.getElementsByClassName("task")[0]);
 144       }
 145     }
 146   },
 147
 148   firstVisibleTask: function () {
 149     for (const task of document.getElementsByClassName("task")) {
 150       if (task instanceof HTMLElement && task.style.display !== "none") {
 151         return task;
 152       }
 153     }
 154   },
 155
 156   focusTaskNameInput: function (event: Event) {
 157     document.getElementById("taskName")!.focus();
 158     event.preventDefault();
 159   },
 160
 161   visibleTaskAtOffset(task: Element, offset: number): Element {
 162     var cursor: Element | null = task;
 163     var valid_cursor = cursor;
 164     const increment = offset / Math.abs(offset);
 165     while (true) {
 166       cursor = increment > 0 ? cursor.nextElementSibling : cursor.previousElementSibling;
 167       if (!cursor || !(cursor instanceof HTMLElement)) break;
 168       if (cursor.style.display !== "none") {
 169         offset -= increment;
 170         valid_cursor = cursor;
 171       }
 172       if (Math.abs(offset) < 0.5) break;
 173     }
 174     return valid_cursor;
 175   },
 176
 177   moveCursor: function (offset: number): boolean {
 178     const active = document.activeElement;
 179     if (!active) return false;
 180     const dest = this.visibleTaskAtOffset(active, offset);
 181     if (dest !== active && dest instanceof HTMLElement) {
 182       dest.focus();
 183       return true;
 184     }
 185     return false;
 186   },
 187
 188   moveTask: function (offset: number) {
 189     const active = document.activeElement;
 190     if (!active) return;
 191     const dest = this.visibleTaskAtOffset(active, offset);
 192     if (dest === active) return; // Already extremal
 193     var onePastDest: Element | null = this.visibleTaskAtOffset(dest, offset / Math.abs(offset));
 194     if (onePastDest == dest) onePastDest = null; // Will become extremal
 195     if (offset > 0) {
 196       this.setPriority(active, dest, onePastDest);
 197     } else {
 198       this.setPriority(active, onePastDest, dest);
 199     }
 200   },
 201
 202   // Change task's priority to be between other tasks a and b.
 203   setPriority: function (task: Element, a: Element | null, b: Element | null) {
 204     const aPriority = a === null ? 0 : Model.getPriority(a);
 205     const bPriority = b === null ? Date.now() : Model.getPriority(b);
 206     console.assert(aPriority < bPriority, aPriority, "<", bPriority);
 207     const span = bPriority - aPriority;
 208     const newPriority = aPriority + 0.1 * span + 0.8 * span * Math.random();
 209     console.assert(aPriority < newPriority && newPriority < bPriority, aPriority, "<", newPriority, "<", bPriority);
 210     const newPriorityRounded = Math.round(newPriority);
 211     const okToRound = aPriority < newPriorityRounded && newPriorityRounded < bPriority;
 212     UI.setPriority(task.getAttribute("data-created")!, okToRound ? newPriorityRounded : newPriority, Model.getPriority(task));
 213     task instanceof HTMLElement && task.focus();
 214   },
 215
 216   setState: function (newState: string) {
 217     const task = document.activeElement;
 218     if (!task) return;
 219     const oldState = Model.getState(task);
 220     if (newState === oldState) return;
 221     const createTimestamp = task.getAttribute("data-created")!;
 222     this.moveCursor(1) || this.moveCursor(-1);
 223     return UI.setState(createTimestamp, newState, oldState);
 224   },
 225
 226   undo: function () {
 227     const ret = UI.undo();
 228     if (ret && ret instanceof HTMLElement) ret.focus();
 229   },
 230 };
 231
 232 function handleKey(event: any) {
 233   if (event.target.tagName === "INPUT") {
 234     if (event.key == "Enter") return BrowserUI.addTask(event);
 235   } else {
 236     if (event.key == "j") return BrowserUI.moveCursor(1);
 237     if (event.key == "k") return BrowserUI.moveCursor(-1);
 238     if (event.key == "J") return BrowserUI.moveTask(1);
 239     if (event.key == "K") return BrowserUI.moveTask(-1);
 240     if (event.key == "n") return BrowserUI.focusTaskNameInput(event);
 241     if (event.key == "s") return BrowserUI.setState("someday-maybe");
 242     if (event.key == "w") return BrowserUI.setState("waiting");
 243     if (event.key == "d") return BrowserUI.setState("done");
 244     if (event.key == "c") return BrowserUI.setState("cancelled");
 245     if (event.key == "t") return BrowserUI.setState("todo");
 246     if (event.key == "X") return BrowserUI.setState("deleted");
 247     if (event.key == "u") return BrowserUI.undo();
 248   }
 249 }
 250
 251 function browserInit() {
 252   document.body.addEventListener("keydown", handleKey, { capture: false });
 253   log.replay();
 254   BrowserUI.firstVisibleTask()?.focus();
 255 }