Add more progress + abort points to export code

The old `media_files_did_export` hook has been kept around for use with
the legacy apkg exporter (an add-on uses it), and a new 
`legacy_export_progress` hook has been added so we can get progress
from the new colpkg exporter until we move over fully to the new code.

ftl/core/exporting.ftl

@@ -32,3 +32,9 @@ exporting-note-exported =
         [one] { $count } note exported.
        *[other] { $count } notes exported.
     }
+exporting-exporting-file = Exporting file...
+exporting-processed-media-files =
+    { $count ->
+        [one] Processed { $count } media file...
+       *[other] Processed { $count } media files...
+    }

proto/anki/collection.proto

@@ -108,6 +108,7 @@ message Progress {
     uint32 stage_total = 2;
     uint32 stage_current = 3;
   }
+
   oneof value {
     generic.Empty none = 1;
     MediaSync media_sync = 2;
@@ -116,7 +117,7 @@ message Progress {
     NormalSync normal_sync = 5;
     DatabaseCheck database_check = 6;
     string importing = 7;
-    uint32 exporting = 8;
+    string exporting = 8;
   }
 }
 

pylib/anki/exporting.py

@@ -435,14 +435,14 @@ class AnkiCollectionPackageExporter(AnkiPackageExporter):
         def exporting_media() -> bool:
             return any(
                 hook.__name__ == "exported_media"
-                for hook in hooks.media_files_did_export._hooks
+                for hook in hooks.legacy_export_progress._hooks
             )
 
         def progress() -> None:
             while exporting_media():
                 progress = self.col._backend.latest_progress()
                 if progress.HasField("exporting"):
-                    hooks.media_files_did_export(progress.exporting)
+                    hooks.legacy_export_progress(progress.exporting)
                 time.sleep(0.1)
 
         threading.Thread(target=progress).start()

pylib/tools/genhooks.py

@@ -31,7 +31,16 @@ hooks = [
         args=["col: anki.collection.Collection", "ids: Sequence[anki.notes.NoteId]"],
         legacy_hook="remNotes",
     ),
-    Hook(name="media_files_did_export", args=["count: int"]),
+    Hook(
+        name="media_files_did_export",
+        args=["count: int"],
+        doc="Only used by legacy .apkg exporter. Will be deprecated in the future.",
+    ),
+    Hook(
+        name="legacy_export_progress",
+        args=["progress: str"],
+        doc="Temporary hook used in transition to new import/export code.",
+    ),
     Hook(
         name="exporters_list_created",
         args=["exporters: list[tuple[str, Any]]"],

qt/aqt/exporting.py

@@ -160,20 +160,29 @@ class ExportDialog(QDialog):
             else:
                 os.unlink(file)
 
-            # progress handler
-            def exported_media(cnt: int) -> None:
+            # progress handler: old apkg exporter
+            def exported_media_count(cnt: int) -> None:
                 self.mw.taskman.run_on_main(
                     lambda: self.mw.progress.update(
                         label=tr.exporting_exported_media_file(count=cnt)
                     )
                 )
 
+            # progress handler: adaptor for new colpkg importer into old exporting screen.
+            # don't rename this; there's a hack in pylib/exporting.py that assumes this
+            # name
+            def exported_media(progress: str) -> None:
+                self.mw.taskman.run_on_main(
+                    lambda: self.mw.progress.update(label=progress)
+                )
+
             def do_export() -> None:
                 self.exporter.exportInto(file)
 
             def on_done(future: Future) -> None:
                 self.mw.progress.finish()
-                hooks.media_files_did_export.remove(exported_media)
+                hooks.media_files_did_export.remove(exported_media_count)
+                hooks.legacy_export_progress.remove(exported_media)
                 try:
                     # raises if exporter failed
                     future.result()
@@ -186,7 +195,8 @@ class ExportDialog(QDialog):
             if self.isVerbatim:
                 gui_hooks.collection_will_temporarily_close(self.mw.col)
             self.mw.progress.start()
-            hooks.media_files_did_export.append(exported_media)
+            hooks.media_files_did_export.append(exported_media_count)
+            hooks.legacy_export_progress.append(exported_media)
 
             self.mw.taskman.run_in_background(do_export, on_done)
 

qt/aqt/import_export/exporting.py

@@ -246,7 +246,7 @@ class ApkgExporter(Exporter):
 
 def export_progress_update(progress: Progress, update: ProgressUpdate) -> None:
     if not progress.HasField("exporting"):
-        return None
-    update.label = tr.exporting_exported_media_file(count=progress.exporting)
+        return
+    update.label = progress.exporting
     if update.user_wants_abort:
         update.abort = True

rslib/src/backend/import_export.rs

@@ -9,7 +9,7 @@ use crate::{
     backend_proto::{self as pb, export_anki_package_request::Selector},
     import_export::{
         package::{import_colpkg, NoteLog},
-        ImportProgress,
+        ExportProgress, ImportProgress,
     },
     prelude::*,
     search::SearchNode,
@@ -95,7 +95,7 @@ impl Backend {
         move |progress, throttle| handler.update(Progress::Import(progress), throttle)
     }
 
-    fn export_progress_fn(&self) -> impl FnMut(usize, bool) -> bool {
+    fn export_progress_fn(&self) -> impl FnMut(ExportProgress, bool) -> bool {
         let mut handler = self.new_progress_handler();
         move |progress, throttle| handler.update(Progress::Export(progress), throttle)
     }

rslib/src/backend/progress.rs

@@ -10,7 +10,7 @@ use crate::{
     backend_proto as pb,
     dbcheck::DatabaseCheckProgress,
     i18n::I18n,
-    import_export::ImportProgress,
+    import_export::{ExportProgress, ImportProgress},
     media::sync::MediaSyncProgress,
     sync::{FullSyncProgress, NormalSyncProgress, SyncStage},
 };
@@ -52,7 +52,7 @@ pub(super) enum Progress {
     NormalSync(NormalSyncProgress),
     DatabaseCheck(DatabaseCheckProgress),
     Import(ImportProgress),
-    Export(usize),
+    Export(ExportProgress),
 }
 
 pub(super) fn progress_to_proto(progress: Option<Progress>, tr: &I18n) -> pb::Progress {
@@ -117,7 +117,15 @@ pub(super) fn progress_to_proto(progress: Option<Progress>, tr: &I18n) -> pb::Pr
                 }
                 .into(),
             ),
-            Progress::Export(progress) => pb::progress::Value::Exporting(progress as u32),
+            Progress::Export(progress) => pb::progress::Value::Exporting(
+                match progress {
+                    ExportProgress::File => tr.exporting_exporting_file(),
+                    ExportProgress::Media(n) => tr.exporting_processed_media_files(n),
+                    ExportProgress::Notes(n) => tr.importing_processed_notes(n),
+                    ExportProgress::Gathering => tr.importing_gathering(),
+                }
+                .into(),
+            ),
         }
     } else {
         pb::progress::Value::None(pb::Empty {})

rslib/src/import_export/gather.rs

@@ -5,6 +5,7 @@ use std::collections::{HashMap, HashSet};
 
 use itertools::Itertools;
 
+use super::{ExportProgress, IncrementableProgress};
 use crate::{
     decks::immediate_parent_name,
     io::filename_is_safe,
@@ -52,19 +53,25 @@ impl ExchangeData {
         col.storage.clear_searched_cards_table()
     }
 
-    pub(super) fn gather_media_names(&mut self) {
+    pub(super) fn gather_media_names(
+        &mut self,
+        progress: &mut IncrementableProgress<ExportProgress>,
+    ) -> Result<()> {
         let mut inserter = |name: String| {
             if filename_is_safe(&name) {
                 self.media_filenames.insert(name);
             }
         };
+        let mut progress = progress.incrementor(ExportProgress::Notes);
         let svg_getter = svg_getter(&self.notetypes);
         for note in self.notes.iter() {
+            progress.increment()?;
             gather_media_names_from_note(note, &mut inserter, &svg_getter);
         }
         for notetype in self.notetypes.iter() {
             gather_media_names_from_notetype(notetype, &mut inserter);
         }
+        Ok(())
     }
 
     fn remove_scheduling_information(&mut self, col: &Collection) {

rslib/src/import_export/mod.rs

@@ -19,6 +19,14 @@ pub enum ImportProgress {
     Notes(usize),
 }
 
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub enum ExportProgress {
+    File,
+    Gathering,
+    Notes(usize),
+    Media(usize),
+}
+
 /// Wrapper around a progress function, usually passed by the [crate::backend::Backend],
 /// to make repeated calls more ergonomic.
 pub(crate) struct IncrementableProgress<P>(Box<dyn FnMut(P, bool) -> bool>);

rslib/src/import_export/package/apkg/export.rs

@@ -16,7 +16,7 @@ use crate::{
             colpkg::export::{export_collection, MediaIter},
             Meta,
         },
-        IncrementableProgress,
+        ExportProgress, IncrementableProgress,
     },
     io::{atomic_rename, tempfile_in_parent_of},
     prelude::*,
@@ -33,9 +33,10 @@ impl Collection {
         with_media: bool,
         legacy: bool,
         media_fn: Option<Box<dyn FnOnce(HashSet<String>) -> MediaIter>>,
-        progress_fn: impl 'static + FnMut(usize, bool) -> bool,
+        progress_fn: impl 'static + FnMut(ExportProgress, bool) -> bool,
     ) -> Result<usize> {
         let mut progress = IncrementableProgress::new(progress_fn);
+        progress.call(ExportProgress::File)?;
         let temp_apkg = tempfile_in_parent_of(out_path.as_ref())?;
         let mut temp_col = NamedTempFile::new()?;
         let temp_col_path = temp_col
@@ -51,10 +52,12 @@ impl Collection {
             &meta,
             temp_col_path,
             search,
+            &mut progress,
             with_scheduling,
             with_media,
         )?;
 
+        progress.call(ExportProgress::File)?;
         let media = if let Some(media_fn) = media_fn {
             media_fn(data.media_filenames)
         } else {
@@ -80,16 +83,19 @@ impl Collection {
         meta: &Meta,
         path: &str,
         search: impl TryIntoSearch,
+        progress: &mut IncrementableProgress<ExportProgress>,
         with_scheduling: bool,
         with_media: bool,
     ) -> Result<ExchangeData> {
         let mut data = ExchangeData::default();
+        progress.call(ExportProgress::Gathering)?;
         data.gather_data(self, search, with_scheduling)?;
         if with_media {
-            data.gather_media_names();
+            data.gather_media_names(progress)?;
         }
 
         let mut temp_col = Collection::new_minimal(path)?;
+        progress.call(ExportProgress::File)?;
         temp_col.insert_data(&data)?;
         temp_col.set_creation_stamp(self.storage.creation_stamp()?)?;
         temp_col.set_creation_utc_offset(data.creation_utc_offset)?;

rslib/src/import_export/package/colpkg/export.rs

@@ -22,7 +22,7 @@ use zstd::{
 use super::super::{MediaEntries, MediaEntry, Meta, Version};
 use crate::{
     collection::CollectionBuilder,
-    import_export::IncrementableProgress,
+    import_export::{ExportProgress, IncrementableProgress},
     io::{atomic_rename, read_dir_files, tempfile_in_parent_of},
     media::files::filename_if_normalized,
     prelude::*,
@@ -40,9 +40,10 @@ impl Collection {
         out_path: impl AsRef<Path>,
         include_media: bool,
         legacy: bool,
-        progress_fn: impl 'static + FnMut(usize, bool) -> bool,
+        progress_fn: impl 'static + FnMut(ExportProgress, bool) -> bool,
     ) -> Result<()> {
         let mut progress = IncrementableProgress::new(progress_fn);
+        progress.call(ExportProgress::File)?;
         let colpkg_name = out_path.as_ref();
         let temp_colpkg = tempfile_in_parent_of(colpkg_name)?;
         let src_path = self.col_path.clone();
@@ -105,7 +106,7 @@ fn export_collection_file(
     media_dir: Option<PathBuf>,
     legacy: bool,
     tr: &I18n,
-    progress: &mut IncrementableProgress<usize>,
+    progress: &mut IncrementableProgress<ExportProgress>,
 ) -> Result<()> {
     let meta = if legacy {
         Meta::new_legacy()
@@ -148,8 +149,9 @@ pub(crate) fn export_collection(
     col_size: usize,
     media: MediaIter,
     tr: &I18n,
-    progress: &mut IncrementableProgress<usize>,
+    progress: &mut IncrementableProgress<ExportProgress>,
 ) -> Result<()> {
+    progress.call(ExportProgress::File)?;
     let out_file = File::create(&out_path)?;
     let mut zip = ZipWriter::new(out_file);
 
@@ -234,7 +236,7 @@ fn write_media(
     meta: &Meta,
     zip: &mut ZipWriter<File>,
     media: MediaIter,
-    progress: &mut IncrementableProgress<usize>,
+    progress: &mut IncrementableProgress<ExportProgress>,
 ) -> Result<()> {
     let mut media_entries = vec![];
     write_media_files(meta, zip, media, &mut media_entries, progress)?;
@@ -278,10 +280,10 @@ fn write_media_files(
     zip: &mut ZipWriter<File>,
     media: MediaIter,
     media_entries: &mut Vec<MediaEntry>,
-    progress: &mut IncrementableProgress<usize>,
+    progress: &mut IncrementableProgress<ExportProgress>,
 ) -> Result<()> {
     let mut copier = MediaCopier::new(meta);
-    let mut incrementor = progress.incrementor(|u| u);
+    let mut incrementor = progress.incrementor(ExportProgress::Media);
     for (index, res) in media.0.enumerate() {
         incrementor.increment()?;
         let path = res?;