split crate into core and cli

1 files changed, 0 insertions, 165 deletions

diff --git a/src/storage.rs b/src/storage.rs
deleted file mode 100644
index 9e6b270..0000000
--- a/src/storage.rs
+++ /dev/null
@@ -1,165 +0,0 @@
-//! Abstractions over different storage backends.
-//!
-//! The main trait to use here is [`Storage`], which provides the necessary interface to store
-//! tiles. Usually you want to have a `dyn Storage`, and then instantiate it with a concrete
-//! implementation (either [`Folder`] or [`Sqlite`]), depending on the command line flags or
-//! similar.
-use color_eyre::{
-    eyre::{bail, WrapErr},
-    Result,
-};
-use rusqlite::{params, Connection};
-use std::{
-    fs,
-    io::ErrorKind,
-    path::{Path, PathBuf},
-};
-
-/// The trait that provides the interface for storing tiles.
-pub trait Storage {
-    /// Prepare the storage.
-    ///
-    /// This can be used to e.g. ensure the directory exists, or to create the database.
-    fn prepare(&mut self) -> Result<()>;
-    /// Prepare for a given zoom level.
-    ///
-    /// This function is called once per zoom, and can be used e.g. to set up the inner folder for
-    /// the level. This can avoid unnecesary syscalls if this setup would be done in
-    /// [`Storage::store`] instead.
-    fn prepare_zoom(&mut self, zoom: u32) -> Result<()>;
-    /// Store the given data for the tile.
-    fn store(&mut self, zoom: u32, x: u64, y: u64, data: &[u8]) -> Result<()>;
-    /// Finish the storing operation.
-    ///
-    /// This can flush any buffers, commit database changes, and so on.
-    fn finish(&mut self) -> Result<()>;
-}
-
-/// Folder-based storage.
-///
-/// This stores the tiles according to the [slippy map
-/// tilenames](https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames).
-#[derive(Debug)]
-pub struct Folder {
-    base_dir: PathBuf,
-}
-
-impl Folder {
-    /// Create a new folder based storage.
-    ///
-    /// The given directory is the "root" directory, so a tile would be saved as
-    /// `base_dir/{zoom}/{x}/{y}.png`.
-    pub fn new(base_dir: PathBuf) -> Self {
-        Folder { base_dir }
-    }
-}
-
-impl Storage for Folder {
-    fn prepare(&mut self) -> Result<()> {
-        let path = &self.base_dir;
-        let metadata = fs::metadata(path);
-        match metadata {
-            Err(e) if e.kind() == ErrorKind::NotFound => {
-                let parent = path.parent().unwrap_or_else(|| Path::new("/"));
-                fs::create_dir(path)
-                    .context(format!("Could not create output directory at {parent:?}"))?
-            }
-            Err(e) => Err(e).context("Error while checking output directory")?,
-            Ok(m) if m.is_dir() => (),
-            Ok(_) => bail!("Output directory is not a directory"),
-        }
-        Ok(())
-    }
-
-    fn prepare_zoom(&mut self, zoom: u32) -> Result<()> {
-        let target = [&self.base_dir, &zoom.to_string().into()]
-            .iter()
-            .collect::<PathBuf>();
-        fs::create_dir(target)?;
-        Ok(())
-    }
-
-    fn store(&mut self, zoom: u32, x: u64, y: u64, data: &[u8]) -> Result<()> {
-        let folder = self.base_dir.join(zoom.to_string()).join(x.to_string());
-        let metadata = folder.metadata();
-        match metadata {
-            Err(_) => fs::create_dir(&folder)?,
-            Ok(m) if !m.is_dir() => bail!("Output path is not a directory"),
-            _ => {}
-        }
-        let file = folder.join(format!("{y}.png"));
-        fs::write(file, data)?;
-        Ok(())
-    }
-
-    fn finish(&mut self) -> Result<()> {
-        Ok(())
-    }
-}
-
-/// SQLite based storage.
-///
-/// This stores tiles in a SQLite database. The database will have a single table:
-///
-/// ```sql
-/// CREATE TABLE tiles (
-///     zoom INTEGER,
-///     x INTEGER,
-///     y INTEGER,
-///     data BLOB,
-///     PRIMARY KEY (zoom, x, y)
-/// );
-/// ```
-#[derive(Debug)]
-pub struct Sqlite {
-    connection: Connection,
-}
-
-impl Sqlite {
-    /// Create a new SQLite backed tile store.
-    ///
-    /// The database will be saved at the given location. Note that the database must not yet
-    /// exist.
-    pub fn connect<P: AsRef<Path>>(file: P) -> Result<Self> {
-        let path = file.as_ref();
-        if fs::metadata(path).is_ok() {
-            bail!("Path {path:?} already exists, refusing to open")
-        }
-        let connection = Connection::open(path)?;
-        Ok(Sqlite { connection })
-    }
-}
-
-impl Storage for Sqlite {
-    fn prepare(&mut self) -> Result<()> {
-        self.connection.execute(
-            "CREATE TABLE tiles (
-            zoom INTEGER,
-            x INTEGER,
-            y INTEGER,
-            data BLOB,
-            PRIMARY KEY (zoom, x, y)
-        );",
-            (),
-        )?;
-        self.connection.execute("BEGIN;", ())?;
-        Ok(())
-    }
-
-    fn prepare_zoom(&mut self, _zoom: u32) -> Result<()> {
-        Ok(())
-    }
-
-    fn store(&mut self, zoom: u32, x: u64, y: u64, data: &[u8]) -> Result<()> {
-        self.connection.execute(
-            "INSERT INTO tiles (zoom, x, y, data) VALUES (?, ?, ?, ?)",
-            params![zoom, x, y, data],
-        )?;
-        Ok(())
-    }
-
-    fn finish(&mut self) -> Result<()> {
-        self.connection.execute("COMMIT;", ())?;
-        Ok(())
-    }
-}