87 lines
1.9 KiB
TypeScript
87 lines
1.9 KiB
TypeScript
import { SpacePrimitives } from "./space_primitives";
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import { PageMeta } from "../types";
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import Dexie, { Table } from "dexie";
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import { Plug } from "../../plugos/plug";
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type Page = {
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name: string;
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text: string;
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meta: PageMeta;
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};
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export class IndexedDBSpacePrimitives implements SpacePrimitives {
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private pageTable: Table<Page, string>;
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constructor(dbName: string, readonly timeSkew: number = 0) {
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const db = new Dexie(dbName);
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db.version(1).stores({
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page: "name",
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});
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this.pageTable = db.table("page");
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}
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async deletePage(name: string): Promise<void> {
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return this.pageTable.delete(name);
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}
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async getPageMeta(name: string): Promise<PageMeta> {
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let entry = await this.pageTable.get(name);
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if (entry) {
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return entry.meta;
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} else {
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throw Error(`Page not found`);
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}
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}
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invokeFunction(
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plug: Plug<any>,
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env: string,
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name: string,
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args: any[]
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): Promise<any> {
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return plug.invoke(name, args);
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}
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async fetchPageList(): Promise<{
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pages: Set<PageMeta>;
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nowTimestamp: number;
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}> {
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let allPages = await this.pageTable.toArray();
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return {
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pages: new Set(allPages.map((p) => p.meta)),
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nowTimestamp: Date.now() + this.timeSkew,
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};
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}
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proxySyscall(plug: Plug<any>, name: string, args: any[]): Promise<any> {
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return plug.syscall(name, args);
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}
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async readPage(name: string): Promise<{ text: string; meta: PageMeta }> {
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let page = await this.pageTable.get(name);
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if (page) {
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return page;
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} else {
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throw new Error("Page not found");
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}
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}
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async writePage(
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name: string,
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text: string,
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selfUpdate?: boolean,
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lastModified?: number
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): Promise<PageMeta> {
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let meta = {
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name,
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lastModified: lastModified ? lastModified : Date.now() + this.timeSkew,
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};
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await this.pageTable.put({
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name,
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text,
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meta,
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});
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return meta;
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}
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}
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