1 files changed, 120 insertions, 0 deletions
diff --git a/src/commands/meme.rs b/src/commands/meme.rs
new file mode 100644
index 0000000..bb7315c
--- /dev/null
+++ b/src/commands/meme.rs
@@ -0,0 +1,120 @@
+use rand::{thread_rng, distributions::{Weighted, WeightedChoice, Distribution}};
+use serenity::http::AttachmentType;
+use serenity::builder::CreateMessage;
+use diesel::PgConnection;
+
+use super::*;
+use super::playback::CtxExt;
+
+use ::db::*;
+
+#[derive(Clone, Copy, Debug)]
+enum MemeType {
+    Text,
+    Image,
+    Audio,
+}
+
+static mut MEME_WEIGHTS: [Weighted<MemeType>; 3] = [
+    Weighted { weight: 1, item: MemeType::Text },
+    Weighted { weight: 1, item: MemeType::Image },
+    Weighted { weight: 1, item: MemeType::Audio },
+];
+
+static mut TTS_WEIGHTS: [Weighted<bool>; 2] = [
+    Weighted { weight: 4, item: false },
+    Weighted { weight: 1, item: true }
+];
+
+command!(meme(ctx, msg, args) {
+    let ch = msg.channel_id;
+
+    if args.len() == 0 {
+        let conn = connection()?;
+
+        let should_audio = ctx.currently_playing() && ctx.users_listening()?;
+        let dist: WeightedChoice<'static, MemeType> = if should_audio {
+            WeightedChoice::new(unsafe { &mut MEME_WEIGHTS })
+        } else {
+            WeightedChoice::new(unsafe { &mut MEME_WEIGHTS[..2] })
+        };
+
+        match dist.sample(&mut thread_rng()) {
+            MemeType::Text => {
+                let mut text_meme = rand_text(&conn)?;
+
+                let mut ctr = 0;
+                while !should_audio && text_meme.audio_id.is_some() {
+                    text_meme = rand_text(&conn)?;
+
+                    ctr += 1;
+                    if ctr > 10 {
+                        warn!("looped 10 times trying to find a non-audio text meme");
+                        return Ok(());
+                    }
+                }
+
+                send_text(ctx, &text_meme, &conn, msg)?;
+            },
+            MemeType::Image => {
+                let image_meme = rand_image(&conn)?;
+                let image = image_meme.associated_data(&conn)?;
+
+                send_image(&image_meme, &image, ch)?;
+            },
+            MemeType::Audio => {
+                let audio = rand_audio(&conn)?.associated_data(&conn)?;
+                send_audio(ctx, msg, &audio)?;
+            }
+        }
+    }
+});
+
+fn send_text(ctx: &Context, t: &TextMeme, conn: &PgConnection, msg: &Message) -> Result<()> {
+    let (image, audio) = t.associated_data(conn)?;
+
+    let dist = WeightedChoice::new(unsafe { &mut TTS_WEIGHTS });
+
+    let create_msg = |m: CreateMessage| m
+        .tts(dist.sample(&mut thread_rng()))
+        .content(&t.content);
+
+    match image {
+        Some(image) => msg.channel_id.send_files(vec!(AttachmentType::Bytes((&image.data, &t.title))), create_msg)?,
+        None => msg.channel_id.send_message(create_msg)?,
+    };
+
+    if let Some(audio) = audio {
+        send_audio(ctx, msg, &audio)?;
+    }
+
+    Ok(())
+}
+
+fn send_image(image_meme: &ImageMeme, image: &Image, ch: ChannelId) -> Result<()> {
+    ch.send_files(vec!(AttachmentType::Bytes((&image.data, &image_meme.title))), |m| m.content(""))?;
+    Ok(())
+}
+
+// note: slight edge-case race condition here: there could have been something queued since we
+//  checked whether anything was playing. not a significant negative impact and unlikely, so i'm
+//  not worrying about it
+fn send_audio(ctx: &Context, msg: &Message, audio: &Audio) -> Result<()> {
+    let queue_lock = ctx.data.lock().get::<PlayQueue>().cloned().unwrap();
+    let mut play_queue = queue_lock.write().unwrap();
+
+    play_queue.queue.push_front(PlayArgs{
+        initiator: msg.author.name.clone(),
+        data: ::either::Right(audio.data.clone()),
+        sender_channel: msg.channel_id,
+    });
+
+    Ok(())
+}
+
+
+pub fn db_fallback(ctx: &mut Context, msg: &Message, s: &str) -> Result<()> {
+
+
+    Ok(())
+}