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   destroyTask: function (createTimestamp: string) {
  29     const task = this.getTask(createTimestamp);
  30     if (task) {
  31       task.parentElement!.removeChild(task);
  32     }
  33   },
  34
  35   getPriority: function (task: Element): number {
  36     if (task.hasAttribute("data-priority")) {
  37       return parseFloat(task.getAttribute("data-priority")!);
  38     }
  39     return parseFloat(task.getAttribute("data-created")!);
  40   },
  41
  42   getTask: function (createTimestamp: string) {
  43     for (const task of document.getElementsByClassName("task")) {
  44       if (task.getAttribute("data-created") === createTimestamp) {
  45         return task;
  46       }
  47     }
  48   },
  49
  50   setPriority: function (createTimestamp: string, priority: number) {
  51     const target = this.getTask(createTimestamp);
  52     if (!target) return;
  53     target.setAttribute("data-priority", `${priority}`);
  54     for (const task of document.getElementsByClassName("task")) {
  55       if (task !== target && this.getPriority(task) > priority) {
  56         task.parentElement!.insertBefore(target, task);
  57         target instanceof HTMLElement && target.focus();
  58         return;
  59       }
  60     }
  61     document.getElementById("tasks")!.appendChild(target);
  62     target instanceof HTMLElement && target.focus();
  63   },
  64
  65   setState: function (stateTimestamp: string, createTimestamp: string, state: string) {
  66     const task = this.getTask(createTimestamp);
  67     if (task) {
  68       task.setAttribute(`data-${state}`, stateTimestamp);
  69       if (task instanceof HTMLElement) {
  70         task.style.display = "none"; // Until view filtering
  71       }
  72     }
  73   },
  74 };
  75
  76 function Log(prefix: string = "vp-") {
  77   var next_log_index = 0;
  78   return {
  79     apply: function (entry: string) {
  80       const [timestamp, command, data] = splitN(entry, " ", 2);
  81       if (command == "Create") {
  82         return Model.addTask(timestamp, data);
  83       }
  84       if (command == "Destroy") {
  85         return Model.destroyTask(data.split(" ", 1)[0]);
  86       }
  87       if (command == "State") {
  88         const [createTimestamp, state] = splitN(data, " ", 1);
  89         return Model.setState(timestamp, createTimestamp, state);
  90       }
  91       if (command == "Priority") {
  92         const [createTimestamp, newPriority] = splitN(data, " ", 1);
  93         return Model.setPriority(createTimestamp, parseFloat(newPriority));
  94       }
  95     },
  96
  97     record: function (entry: string) {
  98       window.localStorage.setItem(`${prefix}${next_log_index++}`, entry);
  99     },
 100
 101     recordAndApply: function (entry: string) {
 102       this.record(entry);
 103       return this.apply(entry);
 104     },
 105
 106     replay: function () {
 107       while (true) {
 108         const entry = window.localStorage.getItem(`${prefix}${next_log_index}`);
 109         if (entry === null) {
 110           break;
 111         }
 112         this.apply(entry);
 113         next_log_index++;
 114       }
 115     },
 116   };
 117 }
 118 const log = Log();
 119
 120 const UI = {
 121   addTask: function (description: string): Element {
 122     return <Element>log.recordAndApply(`${Date.now()} Create ${description}`);
 123   },
 124   destroyTask: function (createTimestamp: string) {
 125     return log.recordAndApply(`${Date.now()} Destroy ${createTimestamp} ${Model.getTask(createTimestamp)?.textContent}`);
 126   },
 127   setPriority: function (createTimestamp: string, priority: number) {
 128     return log.recordAndApply(`${Date.now()} Priority ${createTimestamp} ${priority}`);
 129   },
 130   setState: function (createTimestamp: string, state: string) {
 131     return log.recordAndApply(`${Date.now()} State ${createTimestamp} ${state}`);
 132   },
 133 };
 134
 135 const BrowserUI = {
 136   addTask: function () {
 137     const input = <HTMLInputElement>document.getElementById("taskName");
 138     if (input.value) {
 139       const task = UI.addTask(input.value);
 140       input.value = "";
 141     }
 142   },
 143
 144   destroyTask: function () {
 145     const createTimestamp = document.activeElement?.getAttribute("data-created");
 146     this.moveCursor(1) || this.moveCursor(-1);
 147     return UI.destroyTask(createTimestamp!);
 148   },
 149
 150   focusTaskNameInput: function (event: any) {
 151     document.getElementById("taskName")!.focus();
 152     event.preventDefault();
 153   },
 154
 155   visibleTaskAtOffset(task: Element, offset: number): Element {
 156     var cursor: Element | null = task;
 157     var valid_cursor = cursor;
 158     const increment = offset / Math.abs(offset);
 159     while (true) {
 160       cursor = increment > 0 ? cursor.nextElementSibling : cursor.previousElementSibling;
 161       if (!cursor || !(cursor instanceof HTMLElement)) break;
 162       if (cursor.style.display !== "none") {
 163         offset -= increment;
 164         valid_cursor = cursor;
 165       }
 166       if (Math.abs(offset) < 0.5) break;
 167     }
 168     return valid_cursor;
 169   },
 170
 171   moveCursor: function (offset: number): boolean {
 172     const active = document.activeElement;
 173     if (!active) return false;
 174     const dest = this.visibleTaskAtOffset(active, offset);
 175     if (dest !== active && dest instanceof HTMLElement) {
 176       dest.focus();
 177       return true;
 178     }
 179     return false;
 180   },
 181
 182   moveTask: function (offset: number) {
 183     const active = document.activeElement;
 184     if (!active) return;
 185     const dest = this.visibleTaskAtOffset(active, offset);
 186     if (dest === active) return; // Already extremal
 187     var onePastDest: Element | null = this.visibleTaskAtOffset(dest, offset / Math.abs(offset));
 188     if (onePastDest == dest) onePastDest = null; // Will become extremal
 189     if (offset > 0) {
 190       this.setPriority(active, dest, onePastDest);
 191     } else {
 192       this.setPriority(active, onePastDest, dest);
 193     }
 194   },
 195
 196   // Change task's priority to be between other tasks a and b.
 197   setPriority: function (task: Element, a: Element | null, b: Element | null) {
 198     const aPriority = a === null ? 0 : Model.getPriority(a);
 199     const bPriority = b === null ? Date.now() : Model.getPriority(b);
 200     console.assert(aPriority < bPriority, aPriority, "<", bPriority);
 201     const span = bPriority - aPriority;
 202     const newPriority = aPriority + 0.1 * span + 0.8 * span * Math.random();
 203     console.assert(aPriority < newPriority && newPriority < bPriority, aPriority, "<", newPriority, "<", bPriority);
 204     const newPriorityRounded = Math.round(newPriority);
 205     const okToRound = aPriority < newPriorityRounded && newPriorityRounded < bPriority;
 206     UI.setPriority(task.getAttribute("data-created")!, okToRound ? newPriorityRounded : newPriority);
 207   },
 208
 209   setState: function (state: string) {
 210     const createTimestamp = document.activeElement?.getAttribute("data-created");
 211     this.moveCursor(1) || this.moveCursor(-1);
 212     return UI.setState(createTimestamp!, state);
 213   },
 214 };
 215
 216 function handleKey(event: any) {
 217   if (event.target.tagName === "INPUT") {
 218     if (event.key == "Enter") return BrowserUI.addTask();
 219   } else {
 220     if (event.key == "j") return BrowserUI.moveCursor(1);
 221     if (event.key == "k") return BrowserUI.moveCursor(-1);
 222     if (event.key == "J") return BrowserUI.moveTask(1);
 223     if (event.key == "K") return BrowserUI.moveTask(-1);
 224     if (event.key == "n") return BrowserUI.focusTaskNameInput(event);
 225     if (event.key == "s") return BrowserUI.setState("someday-maybe");
 226     if (event.key == "w") return BrowserUI.setState("waiting");
 227     if (event.key == "d") return BrowserUI.setState("done");
 228     if (event.key == "c") return BrowserUI.setState("cancelled");
 229     if (event.key == "X") return BrowserUI.destroyTask();
 230   }
 231 }
 232
 233 function browserInit() {
 234   document.body.addEventListener("keydown", handleKey, { capture: false });
 235   log.replay();
 236 }