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+ "crossbeam-deque",
+ "crossbeam-queue",
+ "crossbeam-utils",
+ "futures",
+ "lazy_static",
+ "log",
+ "num_cpus",
+ "slab",
+ "tokio-executor",
+]
+
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+ "crossbeam-utils",
+ "futures",
+ "slab",
+ "tokio-executor",
+]
+
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+]
+
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+ "base64 0.11.0",
+ "byteorder",
+ "bytes 0.5.6",
+ "http 0.2.3",
+ "httparse",
+ "input_buffer",
+ "log",
+ "native-tls",
+ "rand 0.7.3",
+ "sha-1",
+ "url 2.2.1",
+ "utf-8",
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+ "version_check 0.1.5",
+]
+
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+ "matches",
+]
+
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+
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+version = "0.1.0"
+dependencies = [
+ "colored",
+ "elefren",
+ "env_logger",
+ "log",
+ "serde",
+ "toml",
+]
+
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+ "idna 0.1.5",
+ "matches",
+ "percent-encoding 1.0.1",
+]
+
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+dependencies = [
+ "form_urlencoded",
+ "idna 0.2.2",
+ "matches",
+ "percent-encoding 2.1.0",
+]
+
+[[package]]
+name = "utf-8"
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+
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+
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+dependencies = [
+ "same-file",
+ "winapi 0.3.9",
+ "winapi-util",
+]
+
+[[package]]
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+ "futures",
+ "log",
+ "try-lock",
+]
+
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+version = "0.9.0+wasi-snapshot-preview1"
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+
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+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
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+ "winapi 0.3.9",
+]
+
+[[package]]
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+
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+checksum = "b2986deb581c4fe11b621998a5e53361efe6b48a151178d0cd9eeffa4dc6acc9"
+dependencies = [
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "ws2_32-sys"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
+dependencies = [
+ "winapi 0.2.8",
+ "winapi-build",
+]
diff --git a/apps/unionbot/Cargo.toml b/apps/unionbot/Cargo.toml
new file mode 100644
index 00000000000..5e24052f50a
--- /dev/null
+++ b/apps/unionbot/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "unionbot"
+description = "A mastodon bot that reminds you periodically to join a union"
+version = "0.1.0"
+authors = ["Katharina Fey <kookie@spacekookie.de>"]
+edition = "2018"
+
+[dependencies]
+serde = { version = "1.0", features = ["derive"] }
+elefren = "0.22"
+toml = "0.5"
+log = "0.4"
+env_logger = "0.8"
+colored = "2.0"
\ No newline at end of file
diff --git a/apps/unionbot/README.md b/apps/unionbot/README.md
new file mode 100644
index 00000000000..f1b23e6b0f3
--- /dev/null
+++ b/apps/unionbot/README.md
@@ -0,0 +1,19 @@
+# unionbot
+
+A mastodon bot that reminds you periodically to join a union, with
+crowd-sourced suggestions.
+
+*TODO: insert screenshots here*
+
+## How to configure
+
+`unionbot` can be built with [`cargo`].  The main configuration is
+provided via the `acab.toml` configuration file.  Following is an
+example.
+
+```toml
+instance = "botsin.space"
+username = "unionbot"
+secret = "some-secrets-are-meant-to-be-committed"
+unions = "unions/en.toml
+```
diff --git a/apps/unionbot/acab.toml b/apps/unionbot/acab.toml
new file mode 100644
index 00000000000..1f5b741fcc7
--- /dev/null
+++ b/apps/unionbot/acab.toml
@@ -0,0 +1,6 @@
+instance = "https://botsin.space"
+username = "unionbot"
+id = "7mYGOUxnBGBcPnyPuKaIEmq-fvDbjIe3gSXiOVvKakg"
+secret = "LDsz6PCx_qApDxGV7x1NdwSe-hxK9uN5qIP8pAku9Sg"
+token = "IMUxGpqLF7ojDEy-vNUzGX0ZMzi5NP-1SDQUQD5Wqj4"
+unions = "unions/en.toml"
diff --git a/apps/unionbot/src/config.rs b/apps/unionbot/src/config.rs
new file mode 100644
index 00000000000..4f2641aaeee
--- /dev/null
+++ b/apps/unionbot/src/config.rs
@@ -0,0 +1,177 @@
+use crate::fatal;
+use elefren::{
+    data::Data, http_send::HttpSender, registration::Registered, scopes::Scopes, Mastodon,
+};
+use serde::{de::DeserializeOwned, Deserialize, Serialize};
+use std::{
+    collections::BTreeMap,
+    fs::{File, OpenOptions},
+    io::{self, Read, Write},
+    path::{Path, PathBuf},
+};
+
+pub type Location = String;
+pub type Name = String;
+
+type InnerMap = BTreeMap<Location, BTreeMap<Name, BTreeMap<String, String>>>;
+
+#[derive(Debug, Deserialize, Serialize)]
+pub struct UnionMap {
+    #[serde(flatten)]
+    inner: InnerMap,
+    #[serde(skip)]
+    path: PathBuf,
+}
+
+#[derive(Debug, Deserialize, Serialize)]
+pub struct Config {
+    /// The instance URL (example: `botsin.space`)
+    pub instance: String,
+    /// The username (example: `bot@beep.boop`)
+    pub username: String,
+    /// The required login secret
+    #[serde(flatten)]
+    pub secret: Option<Secret>,
+    /// Union suggestion map
+    pub unions: Unions,
+}
+
+#[derive(Debug, Deserialize, Serialize)]
+#[serde(untagged)]
+pub enum Unions {
+    /// The configuration contains a path
+    Path(PathBuf),
+    /// Which is then turned into the union map
+    Map(UnionMap),
+}
+
+impl Unions {
+    fn close(&mut self) {
+        let path = match self {
+            Unions::Path(ref path) => path,
+            Unions::Map(ref map) => &map.path,
+        };
+
+        *self = Unions::Path(path.clone());
+    }
+}
+
+#[derive(Clone, Debug, Deserialize, Serialize)]
+pub struct Secret {
+    pub id: String,
+    pub secret: String,
+    pub token: String,
+}
+
+impl<'d> From<&'d Data> for Secret {
+    fn from(d: &'d Data) -> Self {
+        Self {
+            id: d.client_id.to_string(),
+            secret: d.client_secret.to_string(),
+            token: d.token.to_string(),
+        }
+    }
+}
+
+fn load_path(p: &Path) -> String {
+    let mut f = File::open(p)
+        .unwrap_or_else(|e| fatal!("Failed to open path `{}`: {}", p.to_str().unwrap(), e));
+
+    let mut buf = String::new();
+    f.read_to_string(&mut buf)
+        .unwrap_or_else(|e| fatal!("Failed to read file: {}", e));
+
+    info!("Loaded path {}", p.to_str().unwrap());
+    buf
+}
+
+fn parse_toml<T: DeserializeOwned>(s: String) -> T {
+    toml::from_str(s.as_str()).unwrap_or_else(|e| fatal!("Failed to parse toml: {}", e))
+}
+
+impl Config {
+    pub fn load(path: &Path) -> Self {
+        let cfg_buf = load_path(path);
+        let mut cfg: Config = parse_toml(cfg_buf);
+
+        dbg!(&cfg);
+
+        // Load the union map from the provided path
+        cfg.load_unions();
+
+        // Return
+        cfg
+    }
+
+    /// Load the unions from the path
+    pub fn load_unions(&mut self) {
+        let union_buf = load_path(self.unions_path());
+        let inner: InnerMap = parse_toml(union_buf);
+
+        // Swap the path for the map
+        self.unions = Unions::Map(UnionMap {
+            inner,
+            path: self.unions_path().to_path_buf(),
+        });
+    }
+
+    pub fn registration(&self) -> Mastodon<HttpSender> {
+        let sec = self.assume_secret().clone();
+        Data {
+            base: (&self.instance).clone().into(),
+            client_id: sec.id.into(),
+            client_secret: sec.secret.into(),
+            token: sec.token.into(),
+            redirect: "".into(),
+        }
+        .into()
+    }
+
+    pub fn save(&mut self, path: &Path) -> io::Result<()> {
+        let mut f = OpenOptions::new()
+            .write(true)
+            .create(false)
+            .truncate(true)
+            .open(path)?;
+
+        let string = self.as_toml();
+        f.write_all(string.as_bytes())?;
+
+        Ok(())
+    }
+
+    pub fn as_toml(&mut self) -> String {
+        self.unions.close();
+
+        let string = toml::to_string(self).unwrap();
+        self.load_unions();
+        string
+    }
+
+    fn unions_path(&self) -> &Path {
+        match self.unions {
+            Unions::Path(ref pathbuf) => pathbuf.as_path(),
+            _ => unreachable!(),
+        }
+    }
+
+    fn assume_secret(&self) -> &Secret {
+        self.secret.as_ref().unwrap()
+    }
+
+    pub fn unions(&self, loc: Location) -> &BTreeMap<Name, BTreeMap<String, String>> {
+        match self.unions {
+            Unions::Map(ref map) => map.inner.get(&loc).unwrap(),
+            _ => unreachable!(),
+        }
+    }
+
+    /// Update the secret in the configuration
+    pub fn update_secret<S: Into<Secret>>(&mut self, secret: S) {
+        self.secret = Some(secret.into());
+    }
+
+    pub fn secret(&self) -> Option<Secret> {
+        self.secret.clone()
+    }
+}
diff --git a/apps/unionbot/src/log_util.rs b/apps/unionbot/src/log_util.rs
new file mode 100644
index 00000000000..b87dbe83df4
--- /dev/null
+++ b/apps/unionbot/src/log_util.rs
@@ -0,0 +1,36 @@
+#[macro_export]
+macro_rules! fatal {
+    () => {
+        error!("Unknown failure!");
+        std::process::exit(2)
+    };
+    ($($arg:tt)*) => ({
+        error!($($arg)*);
+        std::process::exit(2)
+    })
+}
+
+use colored::*;
+use env_logger::Builder;
+use log::Level;
+use std::io::Write;
+
+pub fn initialise() {
+    let mut b = Builder::from_default_env();
+    b.format(|buf, record| {
+        let lvl = record.level().to_string();
+        write!(
+            buf,
+            "[{}]: {}\n",
+            match record.level() {
+                Level::Error => lvl.red(),
+                Level::Warn => lvl.yellow(),
+                Level::Info => lvl.green(),
+                Level::Debug => lvl.purple(),
+                Level::Trace => lvl.cyan(),
+            },
+            record.args()
+        )
+    })
+    .init();
+}
diff --git a/apps/unionbot/src/main.rs b/apps/unionbot/src/main.rs
new file mode 100644
index 00000000000..59b01e1a6c1
--- /dev/null
+++ b/apps/unionbot/src/main.rs
@@ -0,0 +1,55 @@
+#[macro_use]
+extern crate log;
+#[macro_use]
+mod log_util;
+
+mod config;
+mod register;
+mod toot;
+
+use config::Config;
+
+use elefren::{helpers::cli, MastodonClient};
+use std::path::PathBuf;
+
+fn main() {
+    std::env::set_var("RUST_LOG", "unionbot=debug,warn");
+    
+    log_util::initialise();
+
+    let path = PathBuf::new().join("acab.toml");
+    let mut cfg = Config::load(path.as_path());
+
+    // Register the app, or authenticate.  Tries to re-write the
+    // configuration file with the updated client secrets, but will
+    // print to stdout if this fails.
+    let masto = match cfg.secret() {
+        Some(_) => {
+            debug!("Attempting authentication with stored secret...");
+            cfg.registration()
+        },
+        None => {
+            warn!("No client secret available, attempting registration!");
+            let reg = register::register(&cfg).unwrap();
+
+            let masto = cli::authenticate(reg).unwrap();
+            
+            cfg.update_secret(&masto.data);
+
+            info!("Persisting client configuration in {}", "acab.toml");
+            if let Err(e) = cfg.save(path.as_path()) {
+                error!("Writing configuration file failed: {}", e);
+                error!("Dumping new configuration on stdout...");
+
+                println!("{}", cfg.as_toml());
+                fatal!("Byeee");
+            }
+
+            masto
+        }
+    };
+
+    info!("Successfully authenticated! ^-^");
+
+    masto.new_status(toot::make(&cfg)).unwrap();
+}
diff --git a/apps/unionbot/src/register.rs b/apps/unionbot/src/register.rs
new file mode 100644
index 00000000000..56bdcce9dbd
--- /dev/null
+++ b/apps/unionbot/src/register.rs
@@ -0,0 +1,18 @@
+use crate::config::Config;
+use elefren::{
+    errors::Result,
+    http_send::HttpSender,
+    registration::{Registered, Registration},
+    scopes::Scopes,
+};
+
+// use mammut::{apps::AppBuilder, Registration, Mastodon};
+
+/// Attempt to register an account
+pub(crate) fn register(cfg: &Config) -> Result<Registered<HttpSender>> {
+    Registration::new(cfg.instance.as_str())
+        .client_name("unionbot")
+        .redirect_uris("urn:ietf:wg:oauth:2.0:oob")
+        .scopes(Scopes::write_all())
+        .build()
+}
diff --git a/apps/unionbot/src/toot.rs b/apps/unionbot/src/toot.rs
new file mode 100644
index 00000000000..5b6b557d2ad
--- /dev/null
+++ b/apps/unionbot/src/toot.rs
@@ -0,0 +1,10 @@
+use crate::config::Config;
+use elefren::status_builder::{NewStatus, StatusBuilder, Visibility};
+
+pub fn make(cfg: &Config) -> NewStatus {
+    StatusBuilder::new()
+        .status("Hello world, join a union!")
+        .visibility(Visibility::Public)
+        .build()
+        .unwrap()
+}
diff --git a/apps/unionbot/unions/en.toml b/apps/unionbot/unions/en.toml
new file mode 100644
index 00000000000..baeb3e69eed
--- /dev/null
+++ b/apps/unionbot/unions/en.toml
@@ -0,0 +1,2 @@
+[berlin]
+FAU  = { name = "FAU Berlin", url = "https://berlin.fau.org" }
\ No newline at end of file