Seems to work!

src/cli.rs

@@ -0,0 +1,64 @@
+use clap::{self, Parser, Subcommand};
+use crate::{db::{Bookmark, Id, Store}, Result};
+
+#[derive(Parser)]
+pub struct Cli {
+    #[command(subcommand)]
+    command: Command,
+    #[arg(short='r')]
+    /// Whether the command should be applied to the reading list instead
+    /// of the bookmark list
+    pub(crate) is_reading_list: bool,
+}
+
+#[derive(Subcommand)]
+enum Command {
+    /// Add an entry to the selected list
+    Add {
+        link: String,
+        #[arg(default_value = "")]
+        comment: String,
+    },
+    /// Fetch the link from an entry in the selected list.
+    /// If fetching from reading list, the item will be removed as well.
+    Get {
+        id: Id,
+    },
+    /// List entries from the selected list.
+    /// The format is ID LINK # COMMENT
+    List,
+    /// Remove an entry, printing out its link in the process.
+    Rm {
+        id: Id,
+    },
+}
+
+impl Cli {
+    pub async fn run(self, mut store: Store) -> Result<()> {
+        match self.command {
+            Command::Add { link, comment } => {
+                let bookmark = Bookmark::new(link, comment);
+                store.add(bookmark).await?;
+            },
+            Command::Get { id } => {
+                let bookmark = store.get(id).await?;
+                if self.is_reading_list {
+                    store.rm(id).await?;
+                }
+                println!("{}", bookmark.link);
+            },
+            Command::List => {
+                let bookmarks = store.list().await?;
+                for Bookmark { id, link, comment } in bookmarks.iter() {
+                    println!("{id} {link} # {comment}");
+                }
+            },
+            Command::Rm { id } => {
+                let bookmark = store.get(id).await?;
+                store.rm(id).await?;
+                println!("{}", bookmark.link);
+            },
+        }
+        Ok(())
+    }
+}

src/db.rs

@@ -0,0 +1,103 @@
+use crate::Result;
+
+use anyhow::anyhow;
+use sqlx::{self, ConnectOptions, SqliteConnection};
+use sqlx::sqlite::SqliteConnectOptions;
+
+pub(crate) type Id = i64;
+
+#[derive(sqlx::FromRow)]
+pub struct Bookmark {
+    #[sqlx(rename="rowid")]
+    pub id: Id,
+    pub link: String,
+    pub comment: String,
+}
+
+impl Bookmark {
+    pub fn new(link: String, comment: String) -> Self {
+        Bookmark { id: 0, link, comment }
+    }
+}
+
+pub struct Store {
+    conn: SqliteConnection,
+    table: &'static str,
+}
+
+impl Store {
+    pub async fn new(location: &str, is_reading_list: bool) -> Result<Self> {
+        let conn = location.parse::<SqliteConnectOptions>()?
+            .connect().await?;
+        let table = {
+            if is_reading_list { "reading_list" } else { "bookmarks" }
+        };
+        let mut result = Self { conn, table };
+        result.create_tables().await?;
+        Ok(result)
+    }
+    
+    pub async fn list(&mut self) -> Result<Vec<Bookmark>> {
+        let query = format!(
+            "SELECT rowid, link, comment
+             FROM {}
+             ORDER BY timestamp",
+             self.table
+        );
+        Ok(sqlx::query_as(&query)
+            .fetch_all(&mut self.conn)
+            .await?)
+    }
+
+    pub async fn add(&mut self, bookmark: Bookmark) -> Result<()> {
+        let query = format!(
+            "INSERT INTO {} VALUES
+             ($1, $2, unixepoch('now'))",
+             self.table
+        );
+        sqlx::query(&query)
+            .bind(bookmark.link)
+            .bind(bookmark.comment)
+            .execute(&mut self.conn).await?;
+        Ok(())
+    }
+
+
+    pub async fn get(&mut self, id: Id)
+        -> Result<Bookmark> {
+        let query = format!(
+            "SELECT rowid, link, comment
+             FROM {}
+             WHERE rowid = $1",
+             self.table
+        );
+        let result = sqlx::query_as(&query)
+            .bind(id)
+            .fetch_optional(&mut self.conn)
+            .await?
+            .ok_or(anyhow!("Could not find a bookmark with that ID!"))?;
+        Ok(result)
+    }
+
+    pub async fn rm(&mut self, id: Id) -> Result<()> {
+        let query = format!(
+            "DELETE FROM {}
+             WHERE rowid = $1",
+            self.table
+        );
+        sqlx::query(&query).bind(id).execute(&mut self.conn).await?;
+        Ok(())
+    }
+
+    async fn create_tables(&mut self) -> Result<()> {
+        for table in ["bookmarks", "reading_list"] {
+            let query = format!(
+                "CREATE TABLE IF NOT EXISTS {}
+                 (link TEXT, comment TEXT, timestamp DATETIME)",
+                table
+            );
+            sqlx::query(&query).execute(&mut self.conn).await?;
+        }
+        Ok(())
+    }
+}

src/main.rs

@@ -1,15 +1,21 @@
-struct Bookmark {
-    link: String,
-    comment: String,
-}
+mod cli;
+mod db;
 
-/* Desired actions:
- * - add new bookmark/reading list item
- * - get bookmark
- * - get RL item and remove/delist
- * - ensure nothing is lost accidentally
- */
+use anyhow::anyhow;
+use clap::Parser;
+use cli::Cli;
 
-fn main() {
-    println!("Hello, world!");
+pub(crate) type Result<T> = anyhow::Result<T>;
+
+#[tokio::main]
+async fn main() -> Result<()> {
+    let cli = Cli::parse();
+    let location = std::env::var("BOOKMARK_DB_PATH")
+            .map_err(|_| anyhow!(
+            "No database path set! \
+             Please provide one with the BOOKMARK_DB_PATH environment \
+             variable.".to_string()
+        ))?;
+    let store = db::Store::new(&location, cli.is_reading_list).await?;
+    cli.run(store).await
 }