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silverbullet/common/util.ts
2024-01-20 22:53:51 +01:00

100 lines
2.8 KiB
TypeScript

import { INDEX_TEMPLATE, SETTINGS_TEMPLATE } from "./PAGE_TEMPLATES.ts";
import { YAML } from "./deps.ts";
import { SpacePrimitives } from "./spaces/space_primitives.ts";
import { expandPropertyNames } from "$sb/lib/json.ts";
import type { BuiltinSettings } from "../web/types.ts";
/**
* Runs a function safely by catching any errors and logging them to the console.
* @param fn - The function to run.
*/
export function safeRun(fn: () => Promise<void>) {
fn().catch((e) => {
console.error(e);
});
}
/**
* Checks if the current platform is Mac-like (Mac, iPhone, iPod, iPad).
* @returns A boolean indicating if the platform is Mac-like.
*/
export function isMacLike() {
return /(Mac|iPhone|iPod|iPad)/i.test(navigator.platform);
}
// TODO: This is naive, may be better to use a proper parser
const yamlSettingsRegex = /```yaml([^`]+)```/;
/**
* Parses YAML settings from a Markdown string.
* @param settingsMarkdown - The Markdown string containing the YAML settings.
* @returns An object representing the parsed YAML settings.
*/
export function parseYamlSettings(settingsMarkdown: string): {
[key: string]: any;
} {
const match = yamlSettingsRegex.exec(settingsMarkdown);
if (!match) {
return {};
}
const yaml = match[1];
try {
return YAML.load(yaml) as {
[key: string]: any;
};
} catch (e: any) {
console.error("Error parsing SETTINGS as YAML", e.message);
return {};
}
}
/**
* Ensures that the settings and index page exist in the given space.
* If they don't exist, default settings and index page will be created.
* @param space - The SpacePrimitives object representing the space.
* @returns A promise that resolves to the built-in settings.
*/
export async function ensureSettingsAndIndex(
space: SpacePrimitives,
): Promise<BuiltinSettings> {
let settingsText: string | undefined;
try {
settingsText = new TextDecoder().decode(
(await space.readFile("SETTINGS.md")).data,
);
} catch (e: any) {
if (e.message === "Not found") {
console.log("No settings found, creating default settings");
await space.writeFile(
"SETTINGS.md",
new TextEncoder().encode(SETTINGS_TEMPLATE),
true,
);
} else {
console.error("Error reading settings", e.message);
console.warn("Falling back to default settings");
return {
indexPage: "index",
};
}
settingsText = SETTINGS_TEMPLATE;
// Ok, then let's also check the index page
try {
await space.getFileMeta("index.md");
} catch (e: any) {
console.log(
"No index page found, creating default index page",
e.message,
);
await space.writeFile(
"index.md",
new TextEncoder().encode(INDEX_TEMPLATE),
);
}
}
const settings: any = parseYamlSettings(settingsText);
expandPropertyNames(settings);
return settings;
}