Merge pull request #19 from Stepland/memon-v0.3.0

Add support for memon 0.3.0

.flake8

@@ -32,6 +32,6 @@ per-file-ignores =
     example*.py: F405, F403
     # Silence weird false positive on inline comments ...
     jubeatools/formats/jubeat_analyser/symbols.py: E262
-    # there's a field named "l" in a marshmallow schema
+    # there's a field named "l" in a marshmallow schema and I don't want te rename it
-    jubeatools/formats/memon/memon.py: E741
+    jubeatools/formats/memon/v0.py: E741
 max-line-length = 120

CHANGELOG.md

@@ -1,3 +1,7 @@
+# v1.3.0
+## Added
+- [memon] 🎉 v0.3.0 support
+
 # v1.2.3
 ## Fixed
 - Loaders and Dumpers would recieve options with unwanted default values when

README.md

@@ -16,7 +16,8 @@ jubeatools ${source} ${destination} -f ${output format} (... format specific opt
 ## Which formats are supported
 |                 |                      | input | output |
 |-----------------|----------------------|:-----:|:------:|
-| memon           | v0.2.0               | ✔️     | ✔️      |
+| memon           | v0.3.0               | ✔️     | ✔️      |
+|                 | v0.2.0               | ✔️     | ✔️      |
 |                 | v0.1.0               | ✔️     | ✔️      |
 |                 | legacy               | ✔️     | ✔️      |
 | jubeat analyser | #memo2               | ✔️     | ✔️      |

docs/repo maintenance.md

@@ -18,7 +18,8 @@ Sanity checks before anything serious happens, from the repo's root :
 Now that this is done you can move on to actually making a new version,
 while still being in the repo's root :
 1. Update `CHANGELOG.md`
-1. Commit everything you want in the new release, including the changelog
+1. Update `README.md` if you've just added support for a new format
+1. Commit everything you want in the new release
 1. Run the script <br> `$ poetry run python utils/bump_version.py {rule}`
    
    `{rule}` will usually be one of `patch`, `minor` or `major`. But it can be anything `poetry version` handles.

jubeatools/formats/dump_tools.py

@@ -1,9 +1,10 @@
 import string
+from functools import singledispatch
 from itertools import count
 from pathlib import Path
-from typing import AbstractSet, Any, Dict, Iterator, TypedDict
+from typing import AbstractSet, Any, Dict, Iterator, Optional, TypedDict
 
-from jubeatools.formats.filetypes import ChartFile
+from jubeatools.formats.filetypes import ChartFile, JubeatFile, SongFile
 from jubeatools.formats.typing import ChartFileDumper, Dumper
 from jubeatools.song import Difficulty, Song
 from jubeatools.utils import none_or
@@ -31,17 +32,12 @@ def make_dumper_from_chart_file_dumper(
 
     def dumper(song: Song, path: Path, **kwargs: Any) -> Dict[Path, bytes]:
         res: Dict[Path, bytes] = {}
-        if path.is_dir():
+        name_format = FileNameFormat(file_name_template, suggestion=path)
-            file_path = file_name_template
-            parent = path
-        else:
-            file_path = path
-            parent = path.parent
-
-        name_format = f"{file_path.stem}{{dedup}}{file_path.suffix}"
         files = internal_dumper(song, **kwargs)
         for chartfile in files:
-            filepath = choose_file_path(chartfile, name_format, parent, res.keys())
+            filepath = name_format.available_filename_for(
+                chartfile, already_chosen=res.keys()
+            )
             res[filepath] = chartfile.contents
 
         return res
@@ -49,28 +45,6 @@ def make_dumper_from_chart_file_dumper(
     return dumper
 
 
-def choose_file_path(
-    chart_file: ChartFile,
-    name_format: str,
-    parent: Path,
-    already_chosen: AbstractSet[Path],
-) -> Path:
-    all_paths = iter_possible_paths(chart_file, name_format, parent)
-    not_on_filesystem = filter(lambda p: not p.exists(), all_paths)
-    not_already_chosen = filter(lambda p: p not in already_chosen, not_on_filesystem)
-    return next(not_already_chosen)
-
-
-def iter_possible_paths(
-    chart_file: ChartFile, name_format: str, parent: Path
-) -> Iterator[Path]:
-    for dedup_index in count(start=0):
-        params = extract_format_params(chart_file, dedup_index)
-        formatter = BetterStringFormatter()
-        filename = formatter.format(name_format, **params).strip()
-        yield parent / filename
-
-
 class FormatParameters(TypedDict, total=False):
     title: str
     # uppercase BSC ADV EXT
@@ -82,13 +56,64 @@ class FormatParameters(TypedDict, total=False):
     dedup: str
 
 
-def extract_format_params(chartfile: ChartFile, dedup_index: int) -> FormatParameters:
+class FileNameFormat:
+    def __init__(self, file_name_template: Path, suggestion: Path):
+        if suggestion.is_dir():
+            file_path = file_name_template
+            self.parent = suggestion
+        else:
+            file_path = suggestion
+            self.parent = suggestion.parent
+
+        self.name_format = f"{file_path.stem}{{dedup}}{file_path.suffix}"
+
+    def available_filename_for(
+        self, file: JubeatFile, already_chosen: Optional[AbstractSet[Path]] = None
+    ) -> Path:
+        fixed_params = extract_format_params(file)
+        return next(self.iter_possible_paths(fixed_params, already_chosen))
+
+    def iter_possible_paths(
+        self,
+        fixed_params: FormatParameters,
+        already_chosen: Optional[AbstractSet[Path]] = None,
+    ) -> Iterator[Path]:
+        all_paths = self.iter_deduped_paths(fixed_params)
+        not_on_filesystem = (p for p in all_paths if not p.exists())
+        if already_chosen is not None:
+            yield from (p for p in not_on_filesystem if p not in already_chosen)
+        else:
+            yield from not_on_filesystem
+
+    def iter_deduped_paths(self, params: FormatParameters) -> Iterator[Path]:
+        for dedup_index in count(start=0):
+            # TODO Remove the type ignore once this issue is fixed
+            # https://github.com/python/mypy/issues/6019
+            params.update(  # type: ignore[call-arg]
+                dedup="" if dedup_index == 0 else f"-{dedup_index}"
+            )
+            formatter = BetterStringFormatter()
+            filename = formatter.format(self.name_format, **params).strip()
+            yield self.parent / filename
+
+
+@singledispatch
+def extract_format_params(file: JubeatFile) -> FormatParameters:
+    ...
+
+
+@extract_format_params.register
+def extract_song_format_params(songfile: SongFile) -> FormatParameters:
+    return FormatParameters(title=none_or(slugify, songfile.song.metadata.title) or "")
+
+
+@extract_format_params.register
+def extract_chart_format_params(chartfile: ChartFile) -> FormatParameters:
     return FormatParameters(
         title=none_or(slugify, chartfile.song.metadata.title) or "",
         difficulty=slugify(chartfile.difficulty),
         difficulty_index=str(DIFFICULTY_INDEX.get(chartfile.difficulty, 2)),
         difficulty_number=str(DIFFICULTY_NUMBER.get(chartfile.difficulty, 3)),
-        dedup="" if dedup_index == 0 else f"-{dedup_index}",
     )
 
 

jubeatools/formats/enum.py

@@ -8,6 +8,7 @@ class Format(str, Enum):
     MEMON_LEGACY = "memon:legacy"
     MEMON_0_1_0 = "memon:v0.1.0"
     MEMON_0_2_0 = "memon:v0.2.0"
+    MEMON_0_3_0 = "memon:v0.3.0"
     MONO_COLUMN = "mono-column"
     MEMO = "memo"
     MEMO_1 = "memo1"

jubeatools/formats/formats.py

@@ -1,50 +1,33 @@
 from typing import Dict
 
+from . import jubeat_analyser, konami, malody, memon
 from .enum import Format
-from .jubeat_analyser import (
-    dump_memo,
-    dump_memo1,
-    dump_memo2,
-    dump_mono_column,
-    load_memo,
-    load_memo1,
-    load_memo2,
-    load_mono_column,
-)
-from .konami import dump_eve, dump_jbsq, load_eve, load_jbsq
-from .malody import dump_malody, load_malody
-from .memon import (
-    dump_memon_0_1_0,
-    dump_memon_0_2_0,
-    dump_memon_legacy,
-    load_memon_0_1_0,
-    load_memon_0_2_0,
-    load_memon_legacy,
-)
 from .typing import Dumper, Loader
 
 LOADERS: Dict[Format, Loader] = {
-    Format.EVE: load_eve,
+    Format.EVE: konami.load_eve,
-    Format.JBSQ: load_jbsq,
+    Format.JBSQ: konami.load_jbsq,
-    Format.MALODY: load_malody,
+    Format.MALODY: malody.load_malody,
-    Format.MEMON_LEGACY: load_memon_legacy,
+    Format.MEMON_LEGACY: memon.load_memon_legacy,
-    Format.MEMON_0_1_0: load_memon_0_1_0,
+    Format.MEMON_0_1_0: memon.load_memon_0_1_0,
-    Format.MEMON_0_2_0: load_memon_0_2_0,
+    Format.MEMON_0_2_0: memon.load_memon_0_2_0,
-    Format.MONO_COLUMN: load_mono_column,
+    Format.MEMON_0_3_0: memon.load_memon_0_3_0,
-    Format.MEMO: load_memo,
+    Format.MONO_COLUMN: jubeat_analyser.load_mono_column,
-    Format.MEMO_1: load_memo1,
+    Format.MEMO: jubeat_analyser.load_memo,
-    Format.MEMO_2: load_memo2,
+    Format.MEMO_1: jubeat_analyser.load_memo1,
+    Format.MEMO_2: jubeat_analyser.load_memo2,
 }
 
 DUMPERS: Dict[Format, Dumper] = {
-    Format.EVE: dump_eve,
+    Format.EVE: konami.dump_eve,
-    Format.JBSQ: dump_jbsq,
+    Format.JBSQ: konami.dump_jbsq,
-    Format.MALODY: dump_malody,
+    Format.MALODY: malody.dump_malody,
-    Format.MEMON_LEGACY: dump_memon_legacy,
+    Format.MEMON_LEGACY: memon.dump_memon_legacy,
-    Format.MEMON_0_1_0: dump_memon_0_1_0,
+    Format.MEMON_0_1_0: memon.dump_memon_0_1_0,
-    Format.MEMON_0_2_0: dump_memon_0_2_0,
+    Format.MEMON_0_2_0: memon.dump_memon_0_2_0,
-    Format.MONO_COLUMN: dump_mono_column,
+    Format.MEMON_0_3_0: memon.dump_memon_0_3_0,
-    Format.MEMO: dump_memo,
+    Format.MONO_COLUMN: jubeat_analyser.dump_mono_column,
-    Format.MEMO_1: dump_memo1,
+    Format.MEMO: jubeat_analyser.dump_memo,
-    Format.MEMO_2: dump_memo2,
+    Format.MEMO_1: jubeat_analyser.dump_memo1,
+    Format.MEMO_2: jubeat_analyser.dump_memo2,
 }

jubeatools/formats/guess.py

@@ -53,6 +53,8 @@ def recognize_memon_version(obj: dict) -> Format:
         return Format.MEMON_0_1_0
     elif version == "0.2.0":
         return Format.MEMON_0_2_0
+    elif version == "0.3.0":
+        return Format.MEMON_0_3_0
     else:
         raise ValueError(f"Unsupported memon version : {version}")
 

jubeatools/formats/jubeat_analyser/dump_tools.py

@@ -210,7 +210,8 @@ def create_sections_from_chart(
 
     header = sections[BeatsTime(0)].commands
     header["o"] = int(timing.beat_zero_offset * 1000)
-    header["lev"] = Decimal(chart.level)
+    if chart.level is not None:
+        header["lev"] = Decimal(chart.level)
     header["dif"] = DIFFICULTY_NUMBER.get(difficulty, 3)
     if metadata.audio is not None:
         header["m"] = metadata.audio

jubeatools/formats/jubeat_analyser/memo2/dump.py

@@ -299,7 +299,8 @@ def _dump_memo2_chart(
     file.write(f"// https://github.com/Stepland/jubeatools\n\n")
 
     # Header
-    file.write(dump_command("lev", Decimal(chart.level)) + "\n")
+    if chart.level is not None:
+        file.write(dump_command("lev", Decimal(chart.level)) + "\n")
     file.write(dump_command("dif", DIFFICULTY_NUMBER.get(difficulty, 1)) + "\n")
     if metadata.audio is not None:
         file.write(dump_command("m", metadata.audio) + "\n")

jubeatools/formats/load_tools.py

@@ -27,7 +27,9 @@ class FolderLoader(Protocol[T]):
         ...
 
 
-def make_folder_loader(glob_pattern: str, file_loader: FileLoader) -> FolderLoader:
+def make_folder_loader(
+    glob_pattern: str, file_loader: FileLoader[T]
+) -> FolderLoader[T]:
     def folder_loader(path: Path) -> Dict[Path, T]:
         files: Dict[Path, T] = {}
         if path.is_dir():

jubeatools/formats/malody/load.py

@@ -9,7 +9,7 @@ import simplejson as json
 
 from jubeatools import song
 from jubeatools.formats import timemap
-from jubeatools.formats.load_tools import make_folder_loader
+from jubeatools.formats.load_tools import FolderLoader, make_folder_loader
 from jubeatools.utils import none_or
 
 from . import schema as malody
@@ -26,7 +26,7 @@ def load_file(path: Path) -> Any:
         return json.load(f, use_decimal=True)
 
 
-load_folder = make_folder_loader("*.mc", load_file)
+load_folder: FolderLoader[Any] = make_folder_loader("*.mc", load_file)
 
 
 def load_malody_file(raw_dict: dict) -> song.Song:

jubeatools/formats/memon/__init__.py

@@ -8,11 +8,13 @@ parse than existing "memo-like" formats (memo, youbeat, etc ...).
 https://github.com/Stepland/memon
 """
 
-from .memon import (
+from .v0 import (
     dump_memon_0_1_0,
     dump_memon_0_2_0,
+    dump_memon_0_3_0,
     dump_memon_legacy,
     load_memon_0_1_0,
     load_memon_0_2_0,
+    load_memon_0_3_0,
     load_memon_legacy,
 )

jubeatools/formats/memon/test_memon.py

@@ -1,36 +1,12 @@
-import tempfile
-from pathlib import Path
 from typing import Set
 
 import hypothesis.strategies as st
 from hypothesis import given
 
 from jubeatools import song
-from jubeatools.formats.typing import Dumper, Loader
+from jubeatools.formats.enum import Format
 from jubeatools.testutils import strategies as jbst
-
+from jubeatools.testutils.test_patterns import dump_and_load_then_compare
-from . import (
-    dump_memon_0_1_0,
-    dump_memon_0_2_0,
-    dump_memon_legacy,
-    load_memon_0_1_0,
-    load_memon_0_2_0,
-    load_memon_legacy,
-)
-
-
-def dump_and_load(
-    expected_song: song.Song, dump_function: Dumper, load_function: Loader
-) -> None:
-    with tempfile.NamedTemporaryFile(mode="wb") as file:
-        files = dump_function(expected_song, Path(file.name))
-        assert len(files) == 1
-        filename, contents = list(files.items())[0]
-        file.write(contents)
-        file.seek(0)
-        actual_song = load_function(Path(file.name))
-
-    assert actual_song == expected_song
 
 
 @st.composite
@@ -56,6 +32,11 @@ def memon_legacy_compatible_song(draw: st.DrawFn) -> song.Song:
             diffs_strat=memon_diffs(),
             chart_strat=jbst.chart(timing_strat=st.none()),
             common_timing_strat=jbst.timing_info(with_bpm_changes=False),
+            metadata_strat=jbst.metadata(
+                text_strat=st.text(
+                    alphabet=st.characters(blacklist_categories=("Cc", "Cs")),
+                ),
+            ),
         )
     )
     random_song.metadata.preview = None
@@ -65,7 +46,7 @@ def memon_legacy_compatible_song(draw: st.DrawFn) -> song.Song:
 
 @given(memon_legacy_compatible_song())
 def test_memon_legacy(song: song.Song) -> None:
-    dump_and_load(song, dump_memon_legacy, load_memon_legacy)
+    dump_and_load_then_compare(Format.MEMON_LEGACY, song)
 
 
 memon_0_1_0_compatible_song = memon_legacy_compatible_song
@@ -73,7 +54,7 @@ memon_0_1_0_compatible_song = memon_legacy_compatible_song
 
 @given(memon_0_1_0_compatible_song())
 def test_memon_0_1_0(song: song.Song) -> None:
-    dump_and_load(song, dump_memon_0_1_0, load_memon_0_1_0)
+    dump_and_load_then_compare(Format.MEMON_0_1_0, song)
 
 
 @st.composite
@@ -84,6 +65,11 @@ def memon_0_2_0_compatible_song(draw: st.DrawFn) -> song.Song:
             diffs_strat=memon_diffs(),
             chart_strat=jbst.chart(timing_strat=st.none()),
             common_timing_strat=jbst.timing_info(with_bpm_changes=False),
+            metadata_strat=jbst.metadata(
+                text_strat=st.text(
+                    alphabet=st.characters(blacklist_categories=("Cc", "Cs")),
+                ),
+            ),
         )
     )
     random_song.metadata.preview_file = None
@@ -92,4 +78,25 @@ def memon_0_2_0_compatible_song(draw: st.DrawFn) -> song.Song:
 
 @given(memon_0_2_0_compatible_song())
 def test_memon_0_2_0(song: song.Song) -> None:
-    dump_and_load(song, dump_memon_0_2_0, load_memon_0_2_0)
+    dump_and_load_then_compare(Format.MEMON_0_2_0, song)
+
+
+@st.composite
+def memon_0_3_0_compatible_song(draw: st.DrawFn) -> song.Song:
+    return draw(
+        jbst.song(
+            diffs_strat=memon_diffs(),
+            chart_strat=jbst.chart(timing_strat=st.none()),
+            common_timing_strat=jbst.timing_info(with_bpm_changes=False),
+            metadata_strat=jbst.metadata(
+                text_strat=st.text(
+                    alphabet=st.characters(blacklist_categories=("Cc", "Cs")),
+                ),
+            ),
+        )
+    )
+
+
+@given(memon_0_3_0_compatible_song())
+def test_memon_0_3_0(song: song.Song) -> None:
+    dump_and_load_then_compare(Format.MEMON_0_3_0, song)

jubeatools/formats/memon/v0.py

@@ -1,7 +1,8 @@
+from functools import reduce
 from io import StringIO
 from itertools import chain
 from pathlib import Path
-from typing import Any, Dict, List, Union
+from typing import Any, Callable, Dict, List, Union
 
 import simplejson as json
 from marshmallow import (
@@ -15,7 +16,11 @@ from marshmallow import (
 from multidict import MultiDict
 
 from jubeatools import song as jbt
-from jubeatools.utils import lcm
+from jubeatools.formats.dump_tools import FileNameFormat
+from jubeatools.formats.filetypes import SongFile
+from jubeatools.formats.load_tools import FolderLoader, make_folder_loader
+from jubeatools.formats.typing import Dumper, Loader
+from jubeatools.utils import lcm, none_or
 
 # v0.x.x long note value :
 #
@@ -102,6 +107,12 @@ class MemonMetadata_0_2_0(MemonMetadata_0_1_0):
     preview = fields.Nested(MemonPreview)
 
 
+class MemonMetadata_0_3_0(MemonMetadata_0_2_0):
+    audio = fields.String(required=False, data_key="music path")
+    cover = fields.String(required=False, data_key="album cover path")
+    preview_path = fields.String(data_key="preview path")
+
+
 class Memon_legacy(StrictSchema):
     metadata = fields.Nested(MemonMetadata_legacy, required=True)
     data = fields.Nested(MemonChart_legacy, required=True, many=True)
@@ -123,15 +134,39 @@ class Memon_0_2_0(StrictSchema):
     )
 
 
-def _load_raw_memon(file: Path) -> Dict[str, Any]:
+class Memon_0_3_0(StrictSchema):
-    with open(file) as f:
+    version = fields.String(required=True, validate=validate.OneOf(["0.3.0"]))
-        res = json.load(f, use_decimal=True)
+    metadata = fields.Nested(MemonMetadata_0_3_0, required=True)
-        if not isinstance(res, dict):
+    data = fields.Dict(
+        keys=fields.String(), values=fields.Nested(MemonChart_0_1_0), required=True
+    )
+
+
+def _load_raw_memon(path: Path) -> Any:
+    with path.open() as f:
+        return json.load(f, use_decimal=True)
+
+
+load_folder: FolderLoader[Any] = make_folder_loader("*.memon", _load_raw_memon)
+
+
+def make_folder_loader_with_optional_merge(
+    memon_loader: Callable[[Any], jbt.Song]
+) -> Loader:
+    def load(path: Path, merge: bool = False, **kwargs: Any) -> jbt.Song:
+        files = load_folder(path)
+        if not merge and len(files) > 1:
             raise ValueError(
-                "JSON file does not represent a valid memon file : "
+                "Multiple .memon files were found in the given folder, "
-                "The top level of a memon file should be a JSON Object"
+                "use the --merge option if you want to make a single memon file "
+                "out of several that each containt a different chart (or set of "
+                "charts) for the same song"
             )
-        return res
+
+        charts = [memon_loader(d) for d in files.values()]
+        return reduce(jbt.Song.merge, charts)
+
+    return load
 
 
 def _load_memon_note_v0(
@@ -149,8 +184,7 @@ def _load_memon_note_v0(
         return jbt.TapNote(time, position)
 
 
-def load_memon_legacy(path: Path, **kwargs: Any) -> jbt.Song:
+def _load_memon_legacy(raw_memon: Any) -> jbt.Song:
-    raw_memon = _load_raw_memon(path)
     schema = Memon_legacy()
     memon = schema.load(raw_memon)
     metadata = jbt.Metadata(
@@ -179,8 +213,10 @@ def load_memon_legacy(path: Path, **kwargs: Any) -> jbt.Song:
     return jbt.Song(metadata=metadata, charts=charts, common_timing=common_timing)
 
 
-def load_memon_0_1_0(path: Path, **kwargs: Any) -> jbt.Song:
+load_memon_legacy = make_folder_loader_with_optional_merge(_load_memon_legacy)
-    raw_memon = _load_raw_memon(path)
+
+
+def _load_memon_0_1_0(raw_memon: Any) -> jbt.Song:
     schema = Memon_0_1_0()
     memon = schema.load(raw_memon)
     metadata = jbt.Metadata(
@@ -209,8 +245,10 @@ def load_memon_0_1_0(path: Path, **kwargs: Any) -> jbt.Song:
     return jbt.Song(metadata=metadata, charts=charts, common_timing=common_timing)
 
 
-def load_memon_0_2_0(path: Path, **kwargs: Any) -> jbt.Song:
+load_memon_0_1_0 = make_folder_loader_with_optional_merge(_load_memon_0_1_0)
-    raw_memon = _load_raw_memon(path)
+
+
+def _load_memon_0_2_0(raw_memon: Any) -> jbt.Song:
     schema = Memon_0_2_0()
     memon = schema.load(raw_memon)
     preview = None
@@ -246,6 +284,49 @@ def load_memon_0_2_0(path: Path, **kwargs: Any) -> jbt.Song:
     return jbt.Song(metadata=metadata, charts=charts, common_timing=common_timing)
 
 
+load_memon_0_2_0 = make_folder_loader_with_optional_merge(_load_memon_0_2_0)
+
+
+def _load_memon_0_3_0(raw_memon: Any) -> jbt.Song:
+    schema = Memon_0_3_0()
+    memon = schema.load(raw_memon)
+    preview = None
+    if "preview" in memon["metadata"]:
+        start = memon["metadata"]["preview"]["position"]
+        length = memon["metadata"]["preview"]["length"]
+        preview = jbt.Preview(start, length)
+
+    metadata = jbt.Metadata(
+        title=memon["metadata"]["title"],
+        artist=memon["metadata"]["artist"],
+        audio=none_or(Path, memon["metadata"].get("audio")),
+        cover=none_or(Path, memon["metadata"].get("cover")),
+        preview=preview,
+        preview_file=none_or(Path, memon["metadata"].get("preview_path")),
+    )
+    common_timing = jbt.Timing(
+        events=[jbt.BPMEvent(time=jbt.BeatsTime(0), BPM=memon["metadata"]["BPM"])],
+        beat_zero_offset=jbt.SecondsTime(-memon["metadata"]["offset"]),
+    )
+    charts: MultiDict[jbt.Chart] = MultiDict()
+    for difficulty, memon_chart in memon["data"].items():
+        charts.add(
+            difficulty,
+            jbt.Chart(
+                level=memon_chart["level"],
+                notes=[
+                    _load_memon_note_v0(note, memon_chart["resolution"])
+                    for note in memon_chart["notes"]
+                ],
+            ),
+        )
+
+    return jbt.Song(metadata=metadata, charts=charts, common_timing=common_timing)
+
+
+load_memon_0_3_0 = make_folder_loader_with_optional_merge(_load_memon_0_3_0)
+
+
 def _long_note_tail_value_v0(note: jbt.LongNote) -> int:
     dx = note.tail_tip.x - note.position.x
     dy = note.tail_tip.y - note.position.y
@@ -267,7 +348,6 @@ def _get_timing(song: jbt.Song) -> jbt.Timing:
 
 
 def _raise_if_unfit_for_v0(song: jbt.Song, version: str) -> None:
-
     """Raises an exception if the Song object is ill-formed or contains information
     that cannot be represented in a memon v0.x.y file (includes legacy)"""
 
@@ -347,8 +427,7 @@ def _dump_memon_note_v0(
     return memon_note
 
 
-def dump_memon_legacy(song: jbt.Song, path: Path, **kwargs: dict) -> Dict[Path, bytes]:
+def _dump_memon_legacy(song: jbt.Song) -> SongFile:
-
     _raise_if_unfit_for_v0(song, "legacy")
     timing = _get_timing(song)
 
@@ -379,16 +458,23 @@ def dump_memon_legacy(song: jbt.Song, path: Path, **kwargs: dict) -> Dict[Path,
             }
         )
 
-    if path.is_dir():
+    return SongFile(contents=_dump_to_json(memon), song=song)
-        filepath = path / f"{song.metadata.title}.memon"
-    else:
-        filepath = path
-
-    return {filepath: _dump_to_json(memon)}
 
 
-def dump_memon_0_1_0(song: jbt.Song, path: Path, **kwargs: dict) -> Dict[Path, bytes]:
+def make_memon_dumper(internal_dumper: Callable[[jbt.Song], SongFile]) -> Dumper:
+    def dump(song: jbt.Song, path: Path, **kwargs: dict) -> Dict[Path, bytes]:
+        name_format = FileNameFormat(Path("{title}.memon"), suggestion=path)
+        songfile = internal_dumper(song)
+        filepath = name_format.available_filename_for(songfile)
+        return {filepath: songfile.contents}
 
+    return dump
+
+
+dump_memon_legacy = make_memon_dumper(_dump_memon_legacy)
+
+
+def _dump_memon_0_1_0(song: jbt.Song) -> SongFile:
     _raise_if_unfit_for_v0(song, "v0.1.0")
     timing = _get_timing(song)
 
@@ -415,15 +501,13 @@ def dump_memon_0_1_0(song: jbt.Song, path: Path, **kwargs: dict) -> Dict[Path, b
             ],
         }
 
-    if path.is_dir():
+    return SongFile(contents=_dump_to_json(memon), song=song)
-        filepath = path / f"{song.metadata.title}.memon"
-    else:
-        filepath = path
-
-    return {filepath: _dump_to_json(memon)}
 
 
-def dump_memon_0_2_0(song: jbt.Song, path: Path, **kwargs: dict) -> Dict[Path, bytes]:
+dump_memon_0_1_0 = make_memon_dumper(_dump_memon_0_1_0)
+
+
+def _dump_memon_0_2_0(song: jbt.Song) -> SongFile:
 
     _raise_if_unfit_for_v0(song, "v0.2.0")
     timing = _get_timing(song)
@@ -458,9 +542,55 @@ def dump_memon_0_2_0(song: jbt.Song, path: Path, **kwargs: dict) -> Dict[Path, b
             ],
         }
 
-    if path.is_dir():
+    return SongFile(contents=_dump_to_json(memon), song=song)
-        filepath = path / f"{song.metadata.title}.memon"
-    else:
-        filepath = path
 
-    return {filepath: _dump_to_json(memon)}
+
+dump_memon_0_2_0 = make_memon_dumper(_dump_memon_0_2_0)
+
+
+def _dump_memon_0_3_0(song: jbt.Song) -> SongFile:
+
+    _raise_if_unfit_for_v0(song, "v0.3.0")
+    timing = _get_timing(song)
+
+    memon: Dict[str, Any] = {
+        "version": "0.3.0",
+        "metadata": {
+            "song title": song.metadata.title,
+            "artist": song.metadata.artist,
+            "BPM": timing.events[0].BPM,
+            "offset": -timing.beat_zero_offset,
+        },
+        "data": {},
+    }
+
+    if song.metadata.audio is not None:
+        memon["metadata"]["music path"] = str(song.metadata.audio)
+
+    if song.metadata.cover is not None:
+        memon["metadata"]["album cover path"] = str(song.metadata.cover)
+
+    if song.metadata.preview is not None:
+        memon["metadata"]["preview"] = {
+            "position": song.metadata.preview.start,
+            "length": song.metadata.preview.length,
+        }
+
+    if song.metadata.preview_file is not None:
+        memon["metadata"]["preview path"] = str(song.metadata.preview_file)
+
+    for difficulty, chart in song.charts.items():
+        resolution = _compute_resolution(chart.notes)
+        memon["data"][difficulty] = {
+            "level": chart.level,
+            "resolution": resolution,
+            "notes": [
+                _dump_memon_note_v0(note, resolution)
+                for note in sorted(set(chart.notes), key=lambda n: (n.time, n.position))
+            ],
+        }
+
+    return SongFile(contents=_dump_to_json(memon), song=song)
+
+
+dump_memon_0_3_0 = make_memon_dumper(_dump_memon_0_3_0)

jubeatools/formats/tests/test_decimal_to_beats.py

@@ -1,17 +1,15 @@
 from decimal import Decimal
 from fractions import Fraction
 
-import pytest
-
 from ..load_tools import round_beats
 
 
-@pytest.mark.parametrize("numerator", range(240))
+def test_fraction_recovery_after_rounding_to_three_decimals() -> None:
-def test_fraction_recovery_after_rounding_to_three_decimals(numerator: int) -> None:
+    for numerator in range(240):
-    fraction = Fraction(numerator, 240)
+        fraction = Fraction(numerator, 240)
-    decimal = numerator / Decimal(240)
+        decimal = numerator / Decimal(240)
-    rounded = round(decimal, 3)
+        rounded = round(decimal, 3)
-    text_form = str(rounded)
+        text_form = str(rounded)
-    re_parsed_decimal = Decimal(text_form)
+        re_parsed_decimal = Decimal(text_form)
-    result = round_beats(re_parsed_decimal)
+        result = round_beats(re_parsed_decimal)
-    assert fraction == result
+        assert fraction == result

jubeatools/song.py

@@ -180,7 +180,7 @@ class Timing:
 
 @dataclass
 class Chart:
-    level: Decimal
+    level: Optional[Decimal]
     timing: Optional[Timing] = None
     notes: List[Union[TapNote, LongNote]] = field(default_factory=list)
 

jubeatools/testutils/test_patterns.py

@@ -20,7 +20,7 @@ def open_temp_dir() -> Iterator[Path]:
 def dump_and_load_then_compare(
     format_: Format,
     song: song.Song,
-    bytes_decoder: Callable[[bytes], str],
+    bytes_decoder: Callable[[bytes], str] = lambda b: b.decode("utf-8"),
     temp_path: Callable[[], ContextManager[Path]] = open_temp_dir,
     load_options: Optional[dict] = None,
     dump_options: Optional[dict] = None,

poetry.lock

@@ -498,6 +498,14 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "types-toml"
+version = "0.10.1"
+description = "Typing stubs for toml"
+category = "dev"
+optional = false
+python-versions = "*"
+
 [[package]]
 name = "typing-extensions"
 version = "3.10.0.2"
@@ -521,7 +529,7 @@ typing-extensions = ">=3.7.4"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.8"
-content-hash = "667e5000f1e328f2d07a86946ad1423912c875c0abcc7efb97a72aec38fdb916"
+content-hash = "025ff93ec3b033c89bdaaeab7905dc10ff450ed70695bcbd863a10e6af6fa9ea"
 
 [metadata.files]
 atomicwrites = [
@@ -864,6 +872,10 @@ types-simplejson = [
     {file = "types-simplejson-3.17.1.tar.gz", hash = "sha256:310ef5addfe97c20b9f2cac85079cbab95fd123c2c9a5c6b99856075d6b48211"},
     {file = "types_simplejson-3.17.1-py3-none-any.whl", hash = "sha256:7b5ac5549f5269f25e5e932d6f4e96ea8397369d6031300161cd1fda484e2534"},
 ]
+types-toml = [
+    {file = "types-toml-0.10.1.tar.gz", hash = "sha256:5c1f8f8d57692397c8f902bf6b4d913a0952235db7db17d2908cc110e70610cb"},
+    {file = "types_toml-0.10.1-py3-none-any.whl", hash = "sha256:8cdfd2b7c89bed703158b042dd5cf04255dae77096db66f4a12ca0a93ccb07a5"},
+]
 typing-extensions = [
     {file = "typing_extensions-3.10.0.2-py2-none-any.whl", hash = "sha256:d8226d10bc02a29bcc81df19a26e56a9647f8b0a6d4a83924139f4a8b01f17b7"},
     {file = "typing_extensions-3.10.0.2-py3-none-any.whl", hash = "sha256:f1d25edafde516b146ecd0613dabcc61409817af4766fbbcfb8d1ad4ec441a34"},

pyproject.toml

@@ -32,6 +32,7 @@ toml = "^0.10.2"
 flake8 = "^3.9.1"
 autoimport = "^0.7.0"
 types-simplejson = "^3.17.1"
+types-toml = "^0.10.1"
 
 [tool.poetry.scripts]
 jubeatools = 'jubeatools.cli.cli:convert'