Improve ISAC libraries, roles, and public profiles

src/lib/server/agent-profiles.ts

@@ -0,0 +1,90 @@
+import type { Database } from '@tursodatabase/database';
+import {
+	displayNameKey,
+	newAgentDisplayName,
+	publicProfileSlugBase
+} from '$lib/agents';
+
+export async function displayNameIsAvailable(
+	database: Database,
+	displayName: string,
+	exceptUserId = ''
+): Promise<boolean> {
+	const row = await (await database.prepare(
+		'SELECT user_id FROM user_profiles WHERE display_name_key=? AND user_id<>?'
+	)).get(displayNameKey(displayName), exceptUserId);
+	return !row;
+}
+
+export async function createAvailableDisplayName(
+	database: Database,
+	preferredName: string,
+	userId: string,
+	placeholder = false
+): Promise<string> {
+	if (!placeholder && await displayNameIsAvailable(database, preferredName)) return preferredName;
+	if (placeholder) {
+		const names = await (await database.prepare(
+			"SELECT display_name FROM user_profiles WHERE display_name LIKE 'Agent %'"
+		)).all();
+		let sequence = names.reduce((highest, row) => {
+			const match = /^Agent ([1-9]\d*)$/.exec(String(row.display_name));
+			return match ? Math.max(highest, Number(match[1])) : highest;
+		}, 0) + 1;
+		while (!(await displayNameIsAvailable(database, newAgentDisplayName(sequence)))) sequence += 1;
+		return newAgentDisplayName(sequence);
+	}
+	for (let suffixLength = 5; suffixLength <= 12; suffixLength += 1) {
+		const candidate = `${preferredName} ${userId.replaceAll('-', '').slice(0, suffixLength).toLowerCase()}`;
+		if (await displayNameIsAvailable(database, candidate)) return candidate;
+	}
+	throw new Error('Unable to allocate a unique display name.');
+}
+
+export async function createPublicProfileSlug(
+	database: Database,
+	displayName: string,
+	userId: string
+): Promise<string> {
+	const base = publicProfileSlugBase(displayName, userId);
+	const existing = await (await database.prepare(
+		'SELECT user_id FROM user_profiles WHERE public_slug=?'
+	)).get(base);
+	if (!existing || String(existing.user_id) === userId) return base;
+	return `${base.slice(0, 55).replace(/-+$/g, '')}~${userId.replaceAll('-', '').slice(0, 8).toLowerCase()}`;
+}
+
+export async function insertUserProfile(
+	database: Database,
+	userId: string,
+	preferredName: string,
+	updatedAt: string,
+	options: { placeholder?: boolean; resolveCollision?: boolean } = {}
+): Promise<{ displayName: string; publicSlug: string }> {
+	const displayName = options.placeholder || options.resolveCollision
+		? await createAvailableDisplayName(database, preferredName, userId, Boolean(options.placeholder))
+		: preferredName;
+	const publicSlug = await createPublicProfileSlug(database, displayName, userId);
+	await (await database.prepare(`INSERT INTO user_profiles
+		(user_id,display_name,display_name_key,public_slug,updated_at) VALUES(?,?,?,?,?)`))
+		.run(userId, displayName, displayNameKey(displayName), publicSlug, updatedAt);
+	return { displayName, publicSlug };
+}
+
+export async function resolveAgentProfile(
+	database: Database,
+	identifier: string
+): Promise<{ id: string; publicSlug: string; displayName: string } | null> {
+	const row = await (await database.prepare(`SELECT users.id,
+			COALESCE(profile.public_slug,users.id) AS public_slug,
+			COALESCE(profile.display_name,users.username) AS display_name
+		FROM users LEFT JOIN user_profiles profile ON profile.user_id=users.id
+		WHERE users.id=? OR profile.public_slug=?
+		ORDER BY CASE WHEN profile.public_slug=? THEN 0 ELSE 1 END
+		LIMIT 1`)).get(identifier, identifier, identifier);
+	return row ? {
+		id: String(row.id),
+		publicSlug: String(row.public_slug),
+		displayName: String(row.display_name)
+	} : null;
+}