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/*
* mygram-droid: Android TV client for Foldergram.
* Copyright (C) 2026 Danilo M. <danix@danix.xyz>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
package mygram.droid;
import android.content.Context;
import android.content.Intent;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.Callable;
import java.util.concurrent.ThreadLocalRandom;
/** Hands a post list to ViewerActivity; intents cannot carry hundreds of posts. */
final class Playlist {
/** Shared with the caller (e.g. a folder grid), not copied, so both see appended pages. */
static List<Post> posts = new ArrayList<>();
static int start;
/** Fetches the next page of posts; null when there is nothing more. */
static Callable<List<Post>> more;
private Playlist() {
}
static void open(Context c, List<Post> list, int startIndex, Callable<List<Post>> pager) {
posts = list;
start = startIndex;
more = pager;
c.startActivity(new Intent(c, ViewerActivity.class));
}
static void openReels(Context c) {
open(c, new ArrayList<>(), 0, Api.reelsPages(1 + ThreadLocalRandom.current().nextInt(1_000_000)));
}
/** Appends the posts not already in the list; returns how many were added. */
static int append(List<Post> page) {
Set<Integer> ids = new HashSet<>();
for (Post p : posts)
ids.add(p.id);
int old = posts.size();
for (Post p : page)
if (ids.add(p.id))
posts.add(p);
return posts.size() - old;
}
}
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