diff --git a/backup.txt b/backup.txt
new file mode 100644
index 0000000..6588b5f
--- /dev/null
+++ b/backup.txt
@@ -0,0 +1,72 @@
+https://en.wikipedia.org/wiki/Nova_Scotia_Trunk_9
+https://en.wikipedia.org/wiki/World_line
+https://en.wikipedia.org/wiki/Vorobyovy_Gory_(Moscow_Metro)
+https://en.wikipedia.org/wiki/Female_impersonators
+https://en.wikipedia.org/wiki/Pauline_Donalda
+https://en.wikipedia.org/wiki/Skull_and_Bones
+https://en.wikipedia.org/wiki/Woodin_cardinal
+https://en.wikipedia.org/wiki/Hoy_No_Circula?wprov=sfla1
+https://en.wikipedia.org/wiki/Bogdanov_affair
+https://en.wikipedia.org/wiki/Subscriber_trunk_dialling
+https://en.wikipedia.org/wiki/Area_code_318
+https://en.wikipedia.org/wiki/Irving_Fisher
+https://en.wikipedia.org/wiki/Can%27t_Stop_(board_game)
+https://en.wikipedia.org/wiki/Three_Arrows_Capital?wprov=sfla1
+https://en.wikipedia.org/wiki/Karlheinz_Stockhausen?wprov=sfla1
+https://en.wikipedia.org/wiki/Kansas_experiment
+https://en.wikipedia.org/wiki/Refusenik
+https://en.wikipedia.org/wiki/Havre_de_Grace,_Maryland
+https://en.wikipedia.org/wiki/Bootblacking_%28BDSM%29?wprov=sfla1
+https://en.wikipedia.org/wiki/Flag_of_Martinique
+https://en.wikipedia.org/wiki/Wii_system_software?wprov=sfti1
+https://en.wikipedia.org/wiki/Vajont_Dam?wprov=sfla1
+https://en.wikipedia.org/wiki/Massachusetts_Avenue_(metropolitan_Boston)
+https://en.wikipedia.org/wiki/User_error?wprov=sfla1
+https://en.wikipedia.org/wiki/Pangram
+https://en.wikipedia.org/wiki/Analemma
+https://en.wikipedia.org/wiki/Market_basket
+https://en.wikipedia.org/wiki/Indian-made_foreign_liquor
+https://en.wikipedia.org/wiki/Meeting_of_Waters
+https://en.wikipedia.org/wiki/Snub_(geometry)
+https://en.wikipedia.org/wiki/List_of_Interstate_Highways_in_Alaska
+https://en.wikipedia.org/wiki/Jeff_Award
+https://en.wikipedia.org/wiki/Crazy_Frog
+https://en.wikipedia.org/wiki/Hurricane_Iota
+https://en.wikipedia.org/wiki/Wade%E2%80%93Giles?wprov=sfti1
+https://en.wikipedia.org/wiki/Japanese_addressing_system?wprov=sfti1
+https://en.wikipedia.org/wiki/Cuban_peso
+https://en.wikipedia.org/wiki/Telephone_numbers_in_the_State_of_Palestine
+https://en.wikipedia.org/wiki/Han_unification
+https://en.wikipedia.org/wiki/Changhua%E2%80%93Kaohsiung_Viaduct
+https://en.wikipedia.org/wiki/Subway_%28George_Bush_Intercontinental_Airport%29?wprov=sfla1
+https://en.wikipedia.org/wiki/Hawaii_Route_200?wprov=sfla1
+https://en.wikipedia.org/wiki/Santa_Muerte?wprov=sfla1
+https://en.wikipedia.org/wiki/National_conventions_for_writing_telephone_numbers?wprov=sfti1
+https://en.wikipedia.org/wiki/FOAF?wprov=sfti1
+https://en.wikipedia.org/wiki/Quebec_Route_389
+https://en.wikipedia.org/wiki/List_of_terms_referring_to_an_average_person?wprov=sfti1
+https://en.wikipedia.org/wiki/Artemis_program?wprov=sfla1
+https://en.wikipedia.org/wiki/The_Chalice_of_the_Gods?wprov=sfla1
+https://en.wikipedia.org/wiki/Chevrolet_Citation
+https://en.wikipedia.org/wiki/History_of_the_Comoros_(1978%E2%80%931989)
+https://en.wikipedia.org/wiki/Wag_(company)
+https://en.wikipedia.org/wiki/New_York_City_steam_system
+https://en.wikipedia.org/wiki/Airbus_Mobile
+https://en.wikipedia.org/wiki/Derry/Londonderry_name_dispute
+https://en.wikipedia.org/wiki/RS-Computer
+https://en.wikipedia.org/wiki/Trainbow?wprov=sfti1
+https://en.wikipedia.org/wiki/Siege_of_Suiyang
+https://en.wikipedia.org/wiki/Amtrak's_25_Hz_traction_power_system
+https://en.wikipedia.org/wiki/Amtrak's_60_Hz_traction_power_system
+https://en.wikipedia.org/wiki/PowerCon
+https://en.wikipedia.org/wiki/Chateaugay,_New_York
+https://en.wikipedia.org/wiki/996_working_hour_system
+https://en.wikipedia.org/wiki/Cin%C3%A9mas_Guzzo
+https://en.wikipedia.org/wiki/List_of_people_from_Montclair,_New_Jersey
+https://en.wikipedia.org/wiki/Latent_heat
+https://en.wikipedia.org/wiki/Enthalpy_of_vaporization
+https://en.wikipedia.org/wiki/Asahi-class_destroyer
+https://en.wikipedia.org/wiki/Algiers_Accords
+https://en.wikipedia.org/wiki/U.S._Route_23_in_Tennessee
+https://en.wikipedia.org/wiki/Gradian
+https://en.wikipedia.org/wiki/Electrostatics
diff --git a/queue.txt b/queue.txt
new file mode 100644
index 0000000..e69de29
diff --git a/src/file.rs b/src/file.rs
new file mode 100644
index 0000000..fe2af7c
--- /dev/null
+++ b/src/file.rs
@@ -0,0 +1,45 @@
+use std::fs::{read_to_string, write, File};
+use std::io;
+use std::io::{Read, Write};
+use std::path::Path;
+
+#[derive(Debug)]
+pub enum FileError {
+  IOError(io::Error),
+  EmptyLine,
+}
+
+impl From<io::Error> for FileError {
+    fn from(value: io::Error) -> Self {
+        Self::IOError(value)
+    }
+}
+
+pub struct LinksFile<'a>(&'a Path);
+
+impl<'a> LinksFile<'a> {
+  pub fn new(p: &'a Path) -> LinksFile<'a> {
+    LinksFile(p)
+  }
+
+  pub fn remove_first_line(&self) -> Result<String, FileError> {
+    let file_contents = read_to_string(self.0)?;
+    let mut file_lines = file_contents.split("\n");
+    let first_line = file_lines.next();
+    let first_line_clean = match first_line {
+      Some("") => return Err(FileError::EmptyLine),
+      Some(a) => a,
+      None => panic!("Iterator returns None, something wrong happened")
+    };
+    let rest_of_file = file_lines.collect::<Vec<&str>>().join("\n");
+    write(self.0, rest_of_file)?;
+    Ok(first_line_clean.to_string())
+  }
+
+  pub fn add_line_to_end(&self, line: String) -> Result<(), FileError> {
+    let old_contents = read_to_string(self.0)?;
+    let new_contents = old_contents.trim().to_owned() + "\n" + &line;
+    write(self.0, new_contents)?;
+    Ok(())
+  }
+}
diff --git a/src/lib.rs b/src/lib.rs
deleted file mode 100644
index 40b968d..0000000
--- a/src/lib.rs
+++ /dev/null
@@ -1,17 +0,0 @@
-use regex::Regex;
-
-fn slug_from_link(link: String) -> Result<String, String> {
-  let re = Regex::new(r"\.wikipedia\.org\/wiki\/|\?").unwrap();
-  let v: Vec<&str> = re.split(&link).collect();
-  println!("{v:?}");
-  if v.len() >= 2 { Ok(v[1].to_string()) } else { Err("Illegal link {link} provided".to_string()) }
-}
-
-mod tests {
-  use super::*;
-
-  #[test]
-  fn test_slug_from_link_1() {
-    assert_eq!(slug_from_link("https://en.wikipedia.org/wiki/Buck-a-beer?wprov=sfla1".to_string()).unwrap().as_str(), "Buck-a-beer")
-  }
-}
diff --git a/src/main.rs b/src/main.rs
index e7a11a9..9b6f27b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,31 @@
+use std::path::Path;
+
+use file::{FileError, LinksFile};
+use mastodon::Mastodon;
+
+mod file;
+mod wikipedia;
+mod mastodon;
+
 fn main() {
-    println!("Hello, world!");
+  dotenv::dotenv().ok();
+  let app_code = std::env::var("APP_CODE").expect("APP_CODE required.");
+  let app_token = std::env::var("APP_TOKEN").expect("APP_TOKEN required.");
+  let app_instance = std::env::var("APP_INSTANCE").expect("APP_INSTANCE required.");
+
+  let queue = LinksFile::new(Path::new("queue.txt"));
+  let backup = LinksFile::new(Path::new("backup.txt"));
+
+  let mastodon = Mastodon::new(app_instance, app_token);
+
+  // get link to post
+  let link_to_post = match queue.remove_first_line() {
+    Ok(a) => a,
+    Err(FileError::EmptyLine) => match backup.remove_first_line() {
+      Ok(b) => b,
+      Err(c) => panic!("{c:?}")
+    },
+    Err(d) => panic!("{d:?}")
+  };
+  println!("{link_to_post}")
 }
diff --git a/src/mastodon.rs b/src/mastodon.rs
new file mode 100644
index 0000000..9566a78
--- /dev/null
+++ b/src/mastodon.rs
@@ -0,0 +1,58 @@
+use reqwest::{blocking::multipart, StatusCode};
+
+pub enum Error {
+  ReqwestError(reqwest::Error),
+  FailureStatus(reqwest::StatusCode)
+}
+
+impl From<reqwest::Error> for Error {
+  fn from(value: reqwest::Error) -> Self {
+    Self::ReqwestError(value)
+  }
+}
+
+#[derive(Copy, Clone)]
+enum Visibility {
+  Public,
+  Unlisted,
+  Private,
+  Direct
+}
+
+impl Visibility {
+  pub fn enum_name(&self) -> String {
+    match self {
+      Self::Public => "public".to_string(),
+      Self::Unlisted => "unlisted".to_string(),
+      Self::Private => "private".to_string(),
+      Self::Direct => "direct".to_string(),
+    }
+  }
+}
+
+pub struct Mastodon {
+  instance: String,
+  token: String
+}
+
+impl Mastodon {
+  pub fn new(instance: String, token: String) -> Self {
+    Mastodon { instance, token }
+  }
+
+  pub fn post_text_status(&self, status: String, visibility: Visibility) -> Result<(), Error> {
+    let form = multipart::Form::new()
+      .text("status", status)
+      .text("visibility", visibility.enum_name());
+    let client = reqwest::blocking::Client::new();
+    let response = client
+      .post(format!("{}/api/v1/statuses", self.instance))
+      .header("Authorization", format!("Bearer {}", self.token))
+      .multipart(form)
+      .send()?;
+    match response.status() {
+      StatusCode::OK => Ok(()),
+      s => Err(Error::FailureStatus(s))
+    }
+  }
+}
diff --git a/src/wikipedia.rs b/src/wikipedia.rs
new file mode 100644
index 0000000..7487a83
--- /dev/null
+++ b/src/wikipedia.rs
@@ -0,0 +1,87 @@
+use regex::Regex;
+
+#[derive(Debug)]
+pub enum Error{
+  IllegalLink(String),
+  ReqwestError(reqwest::Error),
+  JsonError(json::Error),
+  ArticleNotFound,
+}
+
+impl From<reqwest::Error> for Error {
+  fn from(value: reqwest::Error) -> Self {
+    Self::ReqwestError(value)
+  }
+}
+
+impl From<json::Error> for Error {
+  fn from(value: json::Error) -> Self {
+    Self::JsonError(value)
+  }
+}
+
+pub fn slug_from_link(link: String) -> Result<String, Error> {
+  let regex_pattern = Regex::new(r"\.wikipedia\.org\/wiki\/|\?").unwrap();
+  let link_parts: Vec<&str> = regex_pattern.split(&link).collect();
+  if link_parts.len() >= 2 {
+    Ok(link_parts[1].to_string())
+  } else {
+    Err(Error::IllegalLink(link))
+  }
+}
+
+pub fn title_from_slug(slug: String) -> Result<String, Error> {
+  let escaped_slug = slug.replace("/", "%2F");
+  let request_url =
+    format!(
+      "https://api.wikimedia.org/core/v1/wikipedia/en/page/{escaped_slug}/bare"
+    );
+  let response = reqwest::blocking::get(request_url)?;
+  let json_body = response.text()?;
+  let body = json::parse(&json_body)?;
+  match body["title"].as_str() {
+    Some(x) => Ok(x.to_string()),
+    None => Err(Error::ArticleNotFound)
+  }
+}
+
+pub fn post_body(link: String) -> Result<String, Error> {
+  let title = title_from_slug(slug_from_link(link.clone())?)?;
+  Ok(format!("Today's wikipedia article is {title}\n\n\
+  {link}\n\n\
+  #wikipedia").to_string())
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+
+  #[test]
+  fn test_slug_from_link_1() {
+    assert_eq!(slug_from_link("https://en.wikipedia.org/wiki/Buck-a-beer?wprov=sfla1".to_string()).unwrap().as_str(), "Buck-a-beer")
+  }
+
+  #[test]
+  fn test_slug_from_link_2() {
+    assert_eq!(slug_from_link("https://en.wikipedia.org/wiki/GNU/Linux_naming_controversy".to_string()).unwrap().as_str(), "GNU/Linux_naming_controversy")
+  }
+
+  #[test]
+  fn test_title_from_slug_1() {
+    assert_eq!(title_from_slug("Buck-a-beer".to_string()).unwrap().as_str(), "Buck-a-beer")
+  }
+
+  #[test]
+  fn test_title_from_slug_2() {
+    assert_eq!(title_from_slug("GNU/Linux_naming_controversy".to_string()).unwrap().as_str(), "GNU/Linux naming controversy")
+  }
+
+  #[test]
+  fn test_post_body_1() {
+    let body = post_body("https://en.wikipedia.org/wiki/GNU%2FLinux_naming_controversy".to_string()).unwrap();
+    let expected = "Today's wikipedia article is GNU/Linux naming controversy\n\n\
+      https://en.wikipedia.org/wiki/GNU%2FLinux_naming_controversy\n\n\
+      #wikipedia";
+    assert_eq!(body, expected)
+  }
+}