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[vopamoi] / 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) {
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 },
26
27 destroyTask: function (createTimestamp: string) {
28 const task = this.getTask(createTimestamp);
29 if (task) {
30 task.parentElement!.removeChild(task);
31 }
32 },
33
34 getPriority: function (task: Element): number {
35 if (task.hasAttribute("data-priority")) {
36 return parseFloat(task.getAttribute("data-priority")!);
37 }
38 return parseFloat(task.getAttribute("data-created")!);
39 },
40
41 getTask: function (createTimestamp: string) {
42 for (const task of document.getElementsByClassName("task")) {
43 if (task.getAttribute("data-created") === createTimestamp) {
44 return task;
45 }
46 }
47 },
48
49 setPriority: function (createTimestamp: string, priority: number) {
50 const target = this.getTask(createTimestamp);
51 if (!target) return;
52 target.setAttribute("data-priority", `${priority}`);
53 for (const task of document.getElementsByClassName("task")) {
54 if (task !== target && this.getPriority(task) > priority) {
55 task.parentElement!.insertBefore(target, task);
56 target instanceof HTMLElement && target.focus();
57 return;
58 }
59 }
60 document.getElementById("tasks")!.appendChild(target);
61 target instanceof HTMLElement && target.focus();
62 },
63
64 setState: function (stateTimestamp: string, createTimestamp: string, state: string) {
65 const task = this.getTask(createTimestamp);
66 if (task) {
67 task.setAttribute(`data-${state}`, stateTimestamp);
68 if (task instanceof HTMLElement) {
69 task.style.display = "none"; // Until view filtering
70 }
71 }
72 },
73 };
74
75 function Log(prefix: string = "vp-") {
76 var next_log_index = 0;
77 return {
78 apply: function (entry: string) {
79 const [timestamp, command, data] = splitN(entry, " ", 2);
80 if (command == "Create") {
81 Model.addTask(timestamp, data);
82 }
83 if (command == "Destroy") {
84 Model.destroyTask(data.split(" ", 1)[0]);
85 }
86 if (command == "State") {
87 const [createTimestamp, state] = splitN(data, " ", 1);
88 Model.setState(timestamp, createTimestamp, state);
89 }
90 if (command == "Priority") {
91 const [createTimestamp, newPriority] = splitN(data, " ", 1);
92 Model.setPriority(createTimestamp, parseFloat(newPriority));
93 }
94 },
95
96 record: function (entry: string) {
97 window.localStorage.setItem(`${prefix}${next_log_index++}`, entry);
98 },
99
100 recordAndApply: function (entry: string) {
101 this.record(entry);
102 this.apply(entry);
103 },
104
105 replay: function () {
106 while (true) {
107 const entry = window.localStorage.getItem(`${prefix}${next_log_index}`);
108 if (entry === null) {
109 break;
110 }
111 this.apply(entry);
112 next_log_index++;
113 }
114 },
115 };
116 }
117 const log = Log();
118
119 const UI = {
120 addTask: function (description: string) {
121 log.recordAndApply(`${Date.now()} Create ${description}`);
122 },
123 destroyTask: function (createTimestamp: string) {
124 log.recordAndApply(`${Date.now()} Destroy ${createTimestamp} ${Model.getTask(createTimestamp)?.textContent}`);
125 },
126 setPriority: function (createTimestamp: string, priority: number) {
127 log.recordAndApply(`${Date.now()} Priority ${createTimestamp} ${priority}`);
128 },
129 setState: function (createTimestamp: string, state: string) {
130 log.recordAndApply(`${Date.now()} State ${createTimestamp} ${state}`);
131 },
132 };
133
134 const BrowserUI = {
135 addTask: function (form: any) {
136 if (form.taskName.value) {
137 UI.addTask(form.taskName.value);
138 form.taskName.value = "";
139 }
140 return false;
141 },
142
143 destroyTask: function () {
144 const createTimestamp = document.activeElement?.getAttribute("data-created");
145 this.moveCursor(1) || this.moveCursor(-1);
146 return UI.destroyTask(createTimestamp!);
147 },
148
149 focusTaskNameInput: function (event: any) {
150 document.getElementById("taskName")!.focus();
151 event.preventDefault();
152 },
153
154 visibleTaskAtOffset(task: Element, offset: number): Element {
155 var cursor: Element | null = task;
156 var valid_cursor = cursor;
157 const increment = offset / Math.abs(offset);
158 while (true) {
159 cursor = increment > 0 ? cursor.nextElementSibling : cursor.previousElementSibling;
160 if (!cursor || !(cursor instanceof HTMLElement)) break;
161 if (cursor.style.display !== "none") {
162 offset -= increment;
163 valid_cursor = cursor;
164 }
165 if (Math.abs(offset) < 0.5) break;
166 }
167 return valid_cursor;
168 },
169
170 moveCursor: function (offset: number): boolean {
171 const active = document.activeElement;
172 if (!active) return false;
173 const dest = this.visibleTaskAtOffset(active, offset);
174 if (dest !== active && dest instanceof HTMLElement) {
175 dest.focus();
176 return true;
177 }
178 return false;
179 },
180
181 moveTask: function (offset: number) {
182 const active = document.activeElement;
183 if (!active) return;
184 const dest = this.visibleTaskAtOffset(active, offset);
185 if (dest === active) return; // Already extremal
186 var onePastDest: Element | null = this.visibleTaskAtOffset(dest, offset / Math.abs(offset));
187 if (onePastDest == dest) onePastDest = null; // Will become extremal
188 if (offset > 0) {
189 this.setPriority(active, dest, onePastDest);
190 } else {
191 this.setPriority(active, onePastDest, dest);
192 }
193 },
194
195 // Change task's priority to be between other tasks a and b.
196 setPriority: function (task: Element, a: Element | null, b: Element | null) {
197 const aPriority = a === null ? 0 : Model.getPriority(a);
198 const bPriority = b === null ? Date.now() : Model.getPriority(b);
199 console.assert(aPriority < bPriority, aPriority, "<", bPriority);
200 const span = bPriority - aPriority;
201 const newPriority = aPriority + 0.1 * span + 0.8 * span * Math.random();
202 console.assert(aPriority < newPriority && newPriority < bPriority, aPriority, "<", newPriority, "<", bPriority);
203 const newPriorityRounded = Math.round(newPriority);
204 const okToRound = aPriority < newPriorityRounded && newPriorityRounded < bPriority;
205 UI.setPriority(task.getAttribute("data-created")!, okToRound ? newPriorityRounded : newPriority);
206 },
207
208 setState: function (state: string) {
209 const createTimestamp = document.activeElement?.getAttribute("data-created");
210 this.moveCursor(1) || this.moveCursor(-1);
211 return UI.setState(createTimestamp!, state);
212 },
213 };
214
215 function handleKey(event: any) {
216 if (event.target.tagName !== "INPUT") {
217 if (event.key == "j") return BrowserUI.moveCursor(1);
218 if (event.key == "k") return BrowserUI.moveCursor(-1);
219 if (event.key == "J") return BrowserUI.moveTask(1);
220 if (event.key == "K") return BrowserUI.moveTask(-1);
221 if (event.key == "n") return BrowserUI.focusTaskNameInput(event);
222 if (event.key == "s") return BrowserUI.setState("someday-maybe");
223 if (event.key == "w") return BrowserUI.setState("waiting");
224 if (event.key == "d") return BrowserUI.setState("done");
225 if (event.key == "c") return BrowserUI.setState("cancelled");
226 if (event.key == "X") return BrowserUI.destroyTask();
227 }
228 }
229
230 function browserInit() {
231 document.body.addEventListener("keydown", handleKey, { capture: false });
232 log.replay();
233 }