@ayonli/jsext/dialog/terminal/file/mac.ts

A JavaScript extension package for building strong and modern applications.

import { dedent, lines } from "../../../string.ts";
import { run } from "../../../cli.ts";
import { getUTI } from "../../../filetype.ts";
import { escape } from "../util.ts";

function htmlAcceptToAppleType(accept: string): string {
    return accept.split(/\s*,\s*/).map(getUTI).filter(Boolean).map(t => `"${t}"`).join(", ");
}

function createAppleScript(mode: "file" | "files" | "folder", title = "", options: {
    type?: string | undefined;
    forSave?: boolean | undefined;
    defaultName?: string | undefined;
} = {}): string {
    const { type, forSave, defaultName } = options;

    if (mode === "file") {
        if (forSave) {
            return dedent`
                tell application (path to frontmost application as text)
                    set myFile to choose file name${title ? ` with prompt "${escape(title)}"` : ""}\
                        ${defaultName ? ` default name "${escape(defaultName)}"` : ""}
                    POSIX path of myFile
                end
                `;
        } else {
            const _type = type ? htmlAcceptToAppleType(type) : "";
            return dedent`
                tell application (path to frontmost application as text)
                    set myFile to choose file${title ? ` with prompt "${escape(title)}"` : ""}\
                        ${_type ? ` of type {${_type}}` : ""} invisibles false
                    POSIX path of myFile
                end
                `;
        }
    } else if (mode === "files") {
        const _type = type ? htmlAcceptToAppleType(type) : "";
        return dedent`
            tell application (path to frontmost application as text)
                set myFiles to choose file${title ? ` with prompt "${escape(title)}"` : ""}\
                    ${_type ? ` of type {${_type}}` : ""} invisibles false\
                    multiple selections allowed true
                set theList to {}
                repeat with aItem in myFiles
                    set end of theList to POSIX path of aItem
                end repeat
                set my text item delimiters to "\\n"
                return theList as text
            end
            `;
    } else {
        return dedent`
            tell application (path to frontmost application as text)
                set myFolder to choose folder${title ? ` with prompt "${escape(title)}"` : ""}\
                    invisibles false
                POSIX path of myFolder
            end
            `;
    }
}

export async function macPickFile(title = "", options: {
    type?: string | undefined;
    forSave?: boolean | undefined;
    defaultName?: string | undefined;
} = {}): Promise<string | null> {
    const { code, stdout, stderr } = await run("osascript", [
        "-e",
        createAppleScript("file", title, options)
    ]);

    if (!code) {
        const path = stdout.trim();
        return path || null;
    } else {
        if (stderr.includes("User canceled")) {
            return null;
        } else {
            throw new Error(stderr.trim());
        }
    }
}

export async function macPickFiles(title = "", type = ""): Promise<string[]> {
    const { code, stdout, stderr } = await run("osascript", [
        "-e",
        createAppleScript("files", title, { type })
    ]);

    if (!code) {
        const output = stdout.trim();
        return output ? lines(stdout.trim()) : [];
    } else {
        if (stderr.includes("User canceled")) {
            return [];
        } else {
            throw new Error(stderr.trim());
        }
    }
}

export async function macPickFolder(title = ""): Promise<string | null> {
    const { code, stdout, stderr } = await run("osascript", [
        "-e",
        createAppleScript("folder", title)
    ]);

    if (!code) {
        const dir = stdout.trim();
        return dir || null;
    } else {
        if (stderr.includes("User canceled")) {
            return null;
        } else {
            throw new Error(stderr.trim());
        }
    }
}