Prevent duplicate posts

src/helper.rs

@@ -58,11 +58,11 @@ pub async fn get_community_id(
     Ok(data.community_view.community.id)
 }
 
-pub async fn lemmy_login(client: &Client) -> Result<Sensitive<String>, Box<dyn std::error::Error>> {
+pub async fn lemmy_login(client: &Client, user: &Sensitive<String>, password: &Sensitive<String>) -> Result<Sensitive<String>, Box<dyn std::error::Error>> {
     println!("Logging in");
     let params = Login {
-        username_or_email: lemmy_user(),
-        password: lemmy_password()?,
+        username_or_email: user.clone(),
+        password: password.clone(),
         ..Default::default()
     };
 

src/main.rs

@@ -1,16 +1,27 @@
 use chrono::{Datelike, Month, Utc};
-use lemmy_api_common::{post::{CreatePost, PostResponse}, sensitive::Sensitive, lemmy_db_schema::newtypes::PostId};
+use lemmy_api_common::{
+    lemmy_db_schema::{newtypes::PostId, source::post::Post, SortType},
+    person::{GetPersonDetails, GetPersonDetailsResponse},
+    post::{CreatePost, PostResponse},
+    sensitive::Sensitive,
+};
 use reqwest::{Client, Url};
 use serde::Deserialize;
 
 mod helper;
-use crate::helper::{get_community_id, lemmy_community, lemmy_login};
+use crate::helper::{get_community_id, lemmy_community, lemmy_login, lemmy_password, lemmy_user};
 
 #[derive(Debug, Deserialize, Default)]
 struct WordleData {
     days_since_launch: i64,
 }
 
+impl std::fmt::Display for WordleData {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        write!(f, "{}", self.days_since_launch)
+    }
+}
+
 async fn get_current_nyt_wordle_data() -> Result<WordleData, Box<dyn std::error::Error>> {
     println!("Fetching NYT wordle data");
     let now = Utc::now();
@@ -21,27 +32,22 @@ async fn get_current_nyt_wordle_data() -> Result<WordleData, Box<dyn std::error:
     // Did it work?
     response.error_for_status_ref()?;
     let data = response.json::<WordleData>().await?;
-    println!("{:?}", data);
+    println!("Wordle number: {}", data);
     Ok(data)
 }
 
-async fn post_to_lemmy(data: &WordleData, client: &Client, auth: Sensitive<String>) -> Result<PostId, Box<dyn std::error::Error>> {
-    println!("Posting to lemmy: {:?}", data);
+async fn post_to_lemmy(
+    data: &WordleData,
+    client: &Client,
+    auth: Sensitive<String>,
+    date: &chrono::DateTime<Utc>,
+) -> Result<PostId, Box<dyn std::error::Error>> {
+    println!("Posting number {} to lemmy", data);
 
     // Get the community id
     let community_id = get_community_id(client, lemmy_community()).await?;
 
-    let now = Utc::now();
-
-    let month = Month::try_from(now.month() as u8)?;
-    let title = format!(
-        "Wordle #{} - {} {} {} {}",
-        data.days_since_launch,
-        now.weekday(),
-        now.day(),
-        month.name(),
-        now.year()
-    );
+    let title = make_title(data, date)?;
     let url = Url::parse(
         format!(
             "https://www.nytimes.com/games/wordle/index.html#{}",
@@ -69,14 +75,64 @@ async fn post_to_lemmy(data: &WordleData, client: &Client, auth: Sensitive<Strin
     Ok(data.post_view.post.id)
 }
 
+fn make_title(
+    data: &WordleData,
+    date: &chrono::DateTime<Utc>,
+) -> Result<String, Box<dyn std::error::Error>> {
+    let month = Month::try_from(date.month() as u8)?;
+    Ok(format!(
+        "Wordle #{} - {} {} {} {}",
+        data.days_since_launch,
+        date.weekday(),
+        date.day(),
+        month.name(),
+        date.year()
+    ))
+}
+
+async fn get_latest_post(
+    client: &Client,
+    user: &Sensitive<String>,
+) -> Result<Option<Post>, Box<dyn std::error::Error>> {
+    let params = GetPersonDetails {
+        username: Some(user.to_string()),
+        sort: Some(SortType::New),
+        ..Default::default()
+    };
+
+    let response = client
+        .get(helper::api_url("user"))
+        .query(&params)
+        .send()
+        .await?;
+
+    // let data = response.text().await?;
+
+    let data = response.json::<GetPersonDetailsResponse>().await?;
+    if let Some(postview) = data.posts.first() {
+        return Ok(Some(postview.post.clone()));
+    }
+    Ok(None)
+}
+
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
     println!("A wordle a day keeps the doctor away!");
 
+    let now = Utc::now();
+    let user = lemmy_user();
+    let password = lemmy_password()?;
+
     let client = Client::new();
-    let auth = lemmy_login(&client).await?;
+    let auth = lemmy_login(&client, &user, &password).await?;
     let data = get_current_nyt_wordle_data().await?;
-    let id = post_to_lemmy(&data, &client, auth).await?;
+    if let Some(latest_post) = get_latest_post(&client, &user).await? {
+        if latest_post.name == make_title(&data, &now)? {
+            println!("The current wordle has already been posted.");
+            return Ok(());
+        }
+    }
+    let id = post_to_lemmy(&data, &client, auth, &now).await?;
     println!("New post ID: {}", id);
 
     Ok(())