Fix app building

package.nix

@@ -7,5 +7,5 @@ buildNpmPackage {
   pname = "obsidian-tasks-reminder";
   version = "0.0.1";
   src = ./.;
-  npmDepsHash = "sha256-rhwGWuw/X7YGdPwIrgkIGukFNpAwpx/a6H3D/2cVP5Y=";
+  npmDepsHash = "sha256-d8uZWYmroWoju976WXnCaYX+0uTLK/tc6hS/WgEHv/o=";
 }

src/database/deserializer.ts

@@ -0,0 +1,17 @@
+import fs from "fs";
+import { NotificationDatabase } from "../types/notification";
+
+/**
+ * Loads and deserializes database from JSON formatted file.
+ */
+export function loadDatabase(file: string): NotificationDatabase {
+  const text = fs.readFileSync(file).toString();
+  return deserializeDatabase(text);
+}
+
+/**
+ * Deserializes database from JSON format.
+ */
+export function deserializeDatabase(json: string): NotificationDatabase {
+  return JSON.parse(json) as NotificationDatabase;
+}

src/database/index.ts

@@ -0,0 +1,2 @@
+export { serializeDatabase } from "./serializer";
+export { deserializeDatabase } from "./deserializer";

src/database/serializer.ts

@@ -0,0 +1,34 @@
+import fs from "fs";
+import { Task } from "../types/task";
+import { Notification, NotificationDatabase } from "../types/notification";
+
+/**
+ * Applies the mapper for each task from list, groups them by time and dumps the data into JSON formatted file.
+ */
+export function dumpDatabase(file: string, tasks: Task[], mapper: (task: Task) => Notification[]) {
+  const data = serializeDatabase(tasks, mapper);
+  fs.writeFileSync(file, data);
+}
+
+/**
+ * Applies the mapper for each task from list, groups them by time and serializes into JSON format.
+ */
+export function serializeDatabase(tasks: Task[], mapper: (task: Task) => Notification[]): string {
+  const output = tasks.flatMap(wrapWithTimeFiller(mapper)).reduce((acc, n) => {
+    if (n.time) {
+      (acc[n.time] = (acc[n.time] || [])).push(n);
+    };
+    
+    return acc;
+  }, {} as NotificationDatabase);
+
+  return JSON.stringify(output);
+}
+
+function wrapWithTimeFiller(mapper: (task: Task) => Notification[]): (task: Task) => Notification[] {
+  return (task: Task) => mapper(task)
+    .map(notification => ({
+      ...notification,
+      time: task.reminder ?? notification.time,
+    }));
+}

src/loader/index.ts

@@ -3,7 +3,7 @@ import dayjs from "dayjs";
 import { createInterface } from "readline";
 import { parse } from "../generated/grammar/task";
 import { Task as DefaultTask } from "../model";
-import { ParseResult } from "../types/grammar/task";
+import { ParseResult } from "../types/grammar";
 import { Task, TaskPriority } from "../types/task";
 
 /**

src/model/task.ts

@@ -1,5 +1,5 @@
 import dayjs, { Dayjs } from "dayjs";
-import { ParsedTask, ParsedTaskDate, ParsedTaskDependency, ParsedTaskMeta } from "../types/grammar/task";
+import { ParsedTask, ParsedTaskDate, ParsedTaskDependency, ParsedTaskMeta } from "../types/grammar";
 import { Task, TaskPriority } from "../types/task";
 
 export class LazyTask implements Task {

src/types/notification.ts

@@ -0,0 +1,9 @@
+import dayjs, { Dayjs } from "dayjs"
+
+export type Notification = {
+  time?: string;
+  title: string;
+  text: string;
+};
+
+export type NotificationDatabase = Record<string, Notification[]>;