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   getState: function (task: Element): string {
  36     return task.getAttribute("data-state") ?? "todo";
  37   },
  38
  39   getTask: function (createTimestamp: string) {
  40     for (const task of document.getElementsByClassName("task")) {
  41       if (task.getAttribute("data-created") === createTimestamp) {
  42         return task;
  43       }
  44     }
  45   },
  46
  47   setPriority: function (createTimestamp: string, priority: number): Element | null {
  48     const target = this.getTask(createTimestamp);
  49     if (!target) return null;
  50     target.setAttribute("data-priority", `${priority}`);
  51     for (const task of document.getElementsByClassName("task")) {
  52       if (task !== target && this.getPriority(task) > priority) {
  53         task.parentElement!.insertBefore(target, task);
  54         target instanceof HTMLElement && target.focus();
  55         return target;
  56       }
  57     }
  58     document.getElementById("tasks")!.appendChild(target);
  59     target instanceof HTMLElement && target.focus();
  60     return target;
  61   },
  62
  63   setState: function (stateTimestamp: string, createTimestamp: string, state: string) {
  64     const task = this.getTask(createTimestamp);
  65     if (task) {
  66       task.setAttribute("data-state", state);
  67       if (task instanceof HTMLElement) {
  68         task.style.display = state == "todo" ? "block" : "none"; // Until view filtering
  69       }
  70     }
  71   },
  72 };
  73
  74 function Log(prefix: string = "vp-") {
  75   var next_log_index = 0;
  76   return {
  77     apply: function (entry: string) {
  78       const [timestamp, command, data] = splitN(entry, " ", 2);
  79       if (command == "Create") {
  80         return Model.addTask(timestamp, data);
  81       }
  82       if (command == "State") {
  83         const [createTimestamp, state] = splitN(data, " ", 1);
  84         return Model.setState(timestamp, createTimestamp, state);
  85       }
  86       if (command == "Priority") {
  87         const [createTimestamp, newPriority] = splitN(data, " ", 1);
  88         return Model.setPriority(createTimestamp, parseFloat(newPriority));
  89       }
  90     },
  91
  92     record: function (entry: string) {
  93       window.localStorage.setItem(`${prefix}${next_log_index++}`, entry);
  94     },
  95
  96     recordAndApply: function (entry: string) {
  97       this.record(entry);
  98       return this.apply(entry);
  99     },
 100
 101     replay: function () {
 102       while (true) {
 103         const entry = window.localStorage.getItem(`${prefix}${next_log_index}`);
 104         if (entry === null) {
 105           break;
 106         }
 107         this.apply(entry);
 108         next_log_index++;
 109       }
 110     },
 111   };
 112 }
 113 const log = Log();
 114
 115 const undoLog: string[] = [];
 116
 117 const UI = {
 118   addTask: function (description: string): Element {
 119     const now = Date.now();
 120     undoLog.push(`State ${now} deleted`);
 121     return <Element>log.recordAndApply(`${now} Create ${description}`);
 122   },
 123   setPriority: function (createTimestamp: string, newPriority: number, oldPriority: number) {
 124     undoLog.push(`Priority ${createTimestamp} ${oldPriority}`);
 125     return log.recordAndApply(`${Date.now()} Priority ${createTimestamp} ${newPriority}`);
 126   },
 127   setState: function (createTimestamp: string, newState: string, oldState: string) {
 128     undoLog.push(`State ${createTimestamp} ${oldState}`);
 129     return log.recordAndApply(`${Date.now()} State ${createTimestamp} ${newState}`);
 130   },
 131   undo: function () {
 132     if (undoLog.length > 0) {
 133       return log.recordAndApply(`${Date.now()} ${undoLog.pop()}`);
 134     }
 135   },
 136 };
 137
 138 const BrowserUI = {
 139   addTask: function (event: KeyboardEvent) {
 140     const input = <HTMLInputElement>document.getElementById("taskName");
 141     if (input.value) {
 142       const task = UI.addTask(input.value);
 143       input.value = "";
 144       if (event.getModifierState("Control")) {
 145         this.setPriority(task, null, document.getElementsByClassName("task")[0]);
 146       }
 147     }
 148   },
 149
 150   firstVisibleTask: function () {
 151     for (const task of document.getElementsByClassName("task")) {
 152       if (task instanceof HTMLElement && task.style.display !== "none") {
 153         return task;
 154       }
 155     }
 156   },
 157
 158   focusTaskNameInput: function (event: Event) {
 159     document.getElementById("taskName")!.focus();
 160     event.preventDefault();
 161   },
 162
 163   visibleTaskAtOffset(task: Element, offset: number): Element {
 164     var cursor: Element | null = task;
 165     var valid_cursor = cursor;
 166     const increment = offset / Math.abs(offset);
 167     while (true) {
 168       cursor = increment > 0 ? cursor.nextElementSibling : cursor.previousElementSibling;
 169       if (!cursor || !(cursor instanceof HTMLElement)) break;
 170       if (cursor.style.display !== "none") {
 171         offset -= increment;
 172         valid_cursor = cursor;
 173       }
 174       if (Math.abs(offset) < 0.5) break;
 175     }
 176     return valid_cursor;
 177   },
 178
 179   moveCursor: function (offset: number): boolean {
 180     const active = document.activeElement;
 181     if (!active) return false;
 182     const dest = this.visibleTaskAtOffset(active, offset);
 183     if (dest !== active && dest instanceof HTMLElement) {
 184       dest.focus();
 185       return true;
 186     }
 187     return false;
 188   },
 189
 190   moveTask: function (offset: number) {
 191     const active = document.activeElement;
 192     if (!active) return;
 193     const dest = this.visibleTaskAtOffset(active, offset);
 194     if (dest === active) return; // Already extremal
 195     var onePastDest: Element | null = this.visibleTaskAtOffset(dest, offset / Math.abs(offset));
 196     if (onePastDest == dest) onePastDest = null; // Will become extremal
 197     if (offset > 0) {
 198       this.setPriority(active, dest, onePastDest);
 199     } else {
 200       this.setPriority(active, onePastDest, dest);
 201     }
 202   },
 203
 204   // Change task's priority to be between other tasks a and b.
 205   setPriority: function (task: Element, a: Element | null, b: Element | null) {
 206     const aPriority = a === null ? 0 : Model.getPriority(a);
 207     const bPriority = b === null ? Date.now() : Model.getPriority(b);
 208     console.assert(aPriority < bPriority, aPriority, "<", bPriority);
 209     const span = bPriority - aPriority;
 210     const newPriority = aPriority + 0.1 * span + 0.8 * span * Math.random();
 211     console.assert(aPriority < newPriority && newPriority < bPriority, aPriority, "<", newPriority, "<", bPriority);
 212     const newPriorityRounded = Math.round(newPriority);
 213     const okToRound = aPriority < newPriorityRounded && newPriorityRounded < bPriority;
 214     UI.setPriority(task.getAttribute("data-created")!, okToRound ? newPriorityRounded : newPriority, Model.getPriority(task));
 215   },
 216
 217   setState: function (state: string) {
 218     const task = document.activeElement;
 219     if (!task) return;
 220     const createTimestamp = task.getAttribute("data-created")!;
 221     this.moveCursor(1) || this.moveCursor(-1);
 222     return UI.setState(createTimestamp, state, Model.getState(task));
 223   },
 224
 225   undo: function () {
 226     const ret = UI.undo();
 227     if (ret && ret instanceof HTMLElement) ret.focus();
 228   },
 229 };
 230
 231 function handleKey(event: any) {
 232   if (event.target.tagName === "INPUT") {
 233     if (event.key == "Enter") return BrowserUI.addTask(event);
 234   } else {
 235     if (event.key == "j") return BrowserUI.moveCursor(1);
 236     if (event.key == "k") return BrowserUI.moveCursor(-1);
 237     if (event.key == "J") return BrowserUI.moveTask(1);
 238     if (event.key == "K") return BrowserUI.moveTask(-1);
 239     if (event.key == "n") return BrowserUI.focusTaskNameInput(event);
 240     if (event.key == "s") return BrowserUI.setState("someday-maybe");
 241     if (event.key == "w") return BrowserUI.setState("waiting");
 242     if (event.key == "d") return BrowserUI.setState("done");
 243     if (event.key == "c") return BrowserUI.setState("cancelled");
 244     if (event.key == "X") return BrowserUI.setState("deleted");
 245     if (event.key == "u") return BrowserUI.undo();
 246   }
 247 }
 248
 249 function browserInit() {
 250   document.body.addEventListener("keydown", handleKey, { capture: false });
 251   log.replay();
 252   BrowserUI.firstVisibleTask()?.focus();
 253 }