Factor out media importing

rslib/src/import_export/package/apkg/import/media.rs

@@ -0,0 +1,99 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
+use std::{collections::HashMap, fs::File, mem};
+
+use zip::ZipArchive;
+
+use super::Context;
+use crate::{
+    import_export::package::{
+        media::{extract_media_entries, SafeMediaEntry},
+        Meta,
+    },
+    media::{
+        files::{add_hash_suffix_to_file_stem, sha1_of_reader},
+        MediaManager,
+    },
+    prelude::*,
+};
+
+/// Map of source media files, that do not already exist in the target.
+///
+/// original, normalized filename → (refererenced on import material,
+/// entry with possibly remapped filename)
+#[derive(Default)]
+pub(super) struct MediaUseMap(HashMap<String, (bool, SafeMediaEntry)>);
+
+impl<'a> Context<'a> {
+    pub(super) fn prepare_media(&mut self) -> Result<MediaUseMap> {
+        let existing_sha1s = self.target_col.all_existing_sha1s()?;
+        prepare_media(&mut self.archive, &existing_sha1s)
+    }
+
+    pub(super) fn copy_media(&mut self, media_map: &mut MediaUseMap) -> Result<()> {
+        for entry in media_map.used_entries() {
+            entry.copy_from_archive(&mut self.archive, &self.target_col.media_folder)?;
+        }
+        Ok(())
+    }
+}
+
+impl Collection {
+    fn all_existing_sha1s(&mut self) -> Result<HashMap<String, [u8; 20]>> {
+        let mgr = MediaManager::new(&self.media_folder, &self.media_db)?;
+        mgr.all_checksums(|_| true, &self.log)
+    }
+}
+
+fn prepare_media(
+    archive: &mut ZipArchive<File>,
+    existing_sha1s: &HashMap<String, [u8; 20]>,
+) -> Result<MediaUseMap> {
+    let mut media_map = MediaUseMap::default();
+    for mut entry in extract_media_entries(&Meta::new_legacy(), archive)? {
+        if let Some(other_sha1) = existing_sha1s.get(&entry.name) {
+            entry.with_hash_from_archive(archive)?;
+            if entry.sha1 != *other_sha1 {
+                let original_name = entry.uniquify_name();
+                media_map.add(original_name, entry);
+            }
+        } else {
+            media_map.add(entry.name.clone(), entry);
+        }
+    }
+    Ok(media_map)
+}
+
+impl MediaUseMap {
+    pub(super) fn add(&mut self, filename: impl Into<String>, entry: SafeMediaEntry) {
+        self.0.insert(filename.into(), (false, entry));
+    }
+
+    pub(super) fn use_entry(&mut self, filename: &str) -> Option<&SafeMediaEntry> {
+        self.0.get_mut(filename).map(|(used, entry)| {
+            *used = true;
+            &*entry
+        })
+    }
+
+    pub(super) fn used_entries(&self) -> impl Iterator<Item = &SafeMediaEntry> {
+        self.0.values().filter_map(|t| t.0.then(|| &t.1))
+    }
+}
+
+impl SafeMediaEntry {
+    fn with_hash_from_archive(&mut self, archive: &mut ZipArchive<File>) -> Result<()> {
+        if self.sha1 == [0; 20] {
+            let mut reader = self.fetch_file(archive)?;
+            self.sha1 = sha1_of_reader(&mut reader)?;
+        }
+        Ok(())
+    }
+
+    /// Requires sha1 to be set. Returns old file name.
+    fn uniquify_name(&mut self) -> String {
+        let new_name = add_hash_suffix_to_file_stem(&self.name, &self.sha1);
+        mem::replace(&mut self.name, new_name)
+    }
+}

rslib/src/import_export/package/apkg/import/mod.rs

@@ -3,9 +3,10 @@
 
 mod cards;
 mod decks;
+mod media;
 mod notes;
 
-use std::{collections::HashMap, fs::File, io, mem, path::Path};
+use std::{fs::File, io, path::Path};
 
 pub(crate) use notes::NoteMeta;
 use tempfile::NamedTempFile;
@@ -13,28 +14,11 @@ use zip::ZipArchive;
 
 use crate::{
     collection::CollectionBuilder,
-    import_export::{
-        gather::ExchangeData,
-        package::{
-            media::{extract_media_entries, SafeMediaEntry},
-            Meta,
-        },
-    },
-    media::{
-        files::{add_hash_suffix_to_file_stem, sha1_of_reader},
-        MediaManager,
-    },
+    import_export::{gather::ExchangeData, package::Meta},
     prelude::*,
     search::SearchNode,
 };
 
-/// Map of source media files, that do not already exist in the target.
-///
-/// original, normalized filename → (refererenced on import material,
-/// entry with possibly remapped filename)
-#[derive(Default)]
-struct MediaUseMap(HashMap<String, (bool, SafeMediaEntry)>);
-
 struct Context<'a> {
     target_col: &'a mut Collection,
     archive: ZipArchive<File>,
@@ -42,39 +26,6 @@ struct Context<'a> {
     usn: Usn,
 }
 
-impl MediaUseMap {
-    fn add(&mut self, filename: impl Into<String>, entry: SafeMediaEntry) {
-        self.0.insert(filename.into(), (false, entry));
-    }
-
-    fn use_entry(&mut self, filename: &str) -> Option<&SafeMediaEntry> {
-        self.0.get_mut(filename).map(|(used, entry)| {
-            *used = true;
-            &*entry
-        })
-    }
-
-    fn used_entries(&self) -> impl Iterator<Item = &SafeMediaEntry> {
-        self.0.values().filter_map(|t| t.0.then(|| &t.1))
-    }
-}
-
-impl SafeMediaEntry {
-    fn with_hash_from_archive(&mut self, archive: &mut ZipArchive<File>) -> Result<()> {
-        if self.sha1 == [0; 20] {
-            let mut reader = self.fetch_file(archive)?;
-            self.sha1 = sha1_of_reader(&mut reader)?;
-        }
-        Ok(())
-    }
-
-    /// Requires sha1 to be set. Returns old file name.
-    fn uniquify_name(&mut self) -> String {
-        let new_name = add_hash_suffix_to_file_stem(&self.name, &self.sha1);
-        mem::replace(&mut self.name, new_name)
-    }
-}
-
 impl Collection {
     pub fn import_apkg(&mut self, path: impl AsRef<Path>) -> Result<OpOutput<()>> {
         let file = File::open(path)?;
@@ -85,29 +36,6 @@ impl Collection {
             ctx.import()
         })
     }
-
-    fn all_existing_sha1s(&mut self) -> Result<HashMap<String, [u8; 20]>> {
-        let mgr = MediaManager::new(&self.media_folder, &self.media_db)?;
-        mgr.all_checksums(|_| true, &self.log)
-    }
-}
-
-impl ExchangeData {
-    fn gather_from_archive(
-        archive: &mut ZipArchive<File>,
-        search: impl TryIntoSearch,
-        with_scheduling: bool,
-    ) -> Result<Self> {
-        let mut zip_file = archive.by_name(Meta::new_legacy().collection_filename())?;
-        let mut tempfile = NamedTempFile::new()?;
-        io::copy(&mut zip_file, &mut tempfile)?;
-        let mut col = CollectionBuilder::new(tempfile.path()).build()?;
-
-        let mut data = ExchangeData::default();
-        data.gather_data(&mut col, search, with_scheduling)?;
-
-        Ok(data)
-    }
 }
 
 impl<'a> Context<'a> {
@@ -130,28 +58,22 @@ impl<'a> Context<'a> {
         self.import_cards_and_revlog(&imported_notes, &imported_decks)?;
         self.copy_media(&mut media_map)
     }
+}
 
-    fn prepare_media(&mut self) -> Result<MediaUseMap> {
-        let mut media_map = MediaUseMap::default();
-        let existing_sha1s = self.target_col.all_existing_sha1s()?;
-        for mut entry in extract_media_entries(&Meta::new_legacy(), &mut self.archive)? {
-            if let Some(other_sha1) = existing_sha1s.get(&entry.name) {
-                entry.with_hash_from_archive(&mut self.archive)?;
-                if entry.sha1 != *other_sha1 {
-                    let original_name = entry.uniquify_name();
-                    media_map.add(original_name, entry);
-                }
-            } else {
-                media_map.add(entry.name.clone(), entry);
-            }
-        }
-        Ok(media_map)
-    }
+impl ExchangeData {
+    fn gather_from_archive(
+        archive: &mut ZipArchive<File>,
+        search: impl TryIntoSearch,
+        with_scheduling: bool,
+    ) -> Result<Self> {
+        let mut zip_file = archive.by_name(Meta::new_legacy().collection_filename())?;
+        let mut tempfile = NamedTempFile::new()?;
+        io::copy(&mut zip_file, &mut tempfile)?;
+        let mut col = CollectionBuilder::new(tempfile.path()).build()?;
 
-    fn copy_media(&mut self, media_map: &mut MediaUseMap) -> Result<()> {
-        for entry in media_map.used_entries() {
-            entry.copy_from_archive(&mut self.archive, &self.target_col.media_folder)?;
-        }
-        Ok(())
+        let mut data = ExchangeData::default();
+        data.gather_data(&mut col, search, with_scheduling)?;
+
+        Ok(data)
     }
 }

rslib/src/import_export/package/apkg/import/notes.rs

@@ -10,7 +10,7 @@ use std::{
 
 use sha1::Sha1;
 
-use super::{Context, MediaUseMap};
+use super::{media::MediaUseMap, Context};
 use crate::{
     import_export::package::media::safe_normalized_file_name, prelude::*, text::replace_media_refs,
 };