# Changelog

## [Unreleased]
### Added
- Add `specOrNull` delegate to meta and Scheme
- Suspended read methods to the `Binary`
- Synchronously accessed `meta` to all `DataSet`s
- More fine-grained types in Action builders.

### Changed
- `Factory` is now `fun interface` and uses `build` instead of `invoke`. `invoke moved to an extension.
- KTor 2.0
- DataTree `items` call is blocking.
- DataSet `getData` is no longer suspended and renamed to `get`
- DataSet operates with sequences of data instead of flows
- PartialEnvelope uses `Int` instead `UInt`.
- `ActiveDataSet` renamed to `DataSource`

### Deprecated

### Removed

### Fixed
- Meta file name in readMeta from directory
- Tagless and FrontMatter envelope partial readers fix.

### Security

## [0.5.2]
### Added
- Yaml plugin
- Partial fix to #53


### Changed

### Deprecated

### Removed

### Fixed
- MutableMetaImpl attachment and checks
- Listeners in observable meta are replaced by lists
- JS number comparison bug.


### Security

## [0.5.0]
### Added
- Experimental `listOfSpec` delegate.


### Changed
- **API breaking** Config is deprecated, use `ObservableMeta` instead.
- **API breaking** Descriptor no has a member property `defaultValue` instead of `defaultItem()` extension. It caches default value state on the first call. It is done because computing default on each call is too expensive.
- Kotlin 1.5.10
- Build tools 0.10.0
- Relaxed type restriction on `MetaConverter`. Now nullables are available.
- **Huge API-breaking refactoring of Meta**. Meta now can have both value and children. There is only one kind of descriptor now.
- **API breaking** `String.toName()` is replaced by `Name.parse()`
- **API breaking** Configurable`config` changed to `meta`


### Removed
- `Config`
- Public PluginManager mutability
- Tables and tables-exposed moved to the separate project `tables.kt`
- BinaryMetaFormat. Use CBOR encoding instead


### Fixed
- Proper json array index treatment.
- Proper json index for single-value array.

## [0.4.0]
### Added
- LogManager plugin
- dataforge-context API dependency on SLF4j
- Context `withEnv` and `fetch` methods to manipulate plugins without changing plugins after creation.
- Split `ItemDescriptor` into builder and read-only part


### Changed
- Kotlin-logging moved from common to JVM and JS. Replaced by console for native.
- Package changed to `space.kscience`
- Scheme made observable
- Global context is a variable (the singleton is hidden and will be deprecated in future)
- Kotlin 1.5
- Added blank builders for children context.
- Refactor loggers


### Deprecated
- Direct use of PluginManager


### Removed
- Common dependency on Kotlin-logging
- Kotlinx-io fork dependency. Replaced by Ktor-io.


### Fixed
- Scheme properties properly handle children property change.

## [0.3.0]
### Added
- Yaml meta format based on yaml.kt
- `Path` builders
- Special ValueType for lists
- `copy` method to descriptors
- Multiplatform yaml meta


### Changed
- `ListValue` and `DoubleArrayValue` implement `Iterable`.
- Changed the logic of `Value::isList` to check for type instead of size
- `Meta{}` builder made inline
- Moved `Envelope` builder to a top level function. Companion invoke is deprecated.
- Context logging moved to the extension
- `number` and `string` methods on `Value` moved to extensions (breaking change)
- \[Major breaking change\] Schemes and configurables us `MutableItemProvider` instead of `Config`
- \[Major breaking change\] `MetaItem` renamed to `TypedMetaItem` and `MetaItem` is now an alias for `TypedMetaItem<*>`
- \[Major breaking change\] Moved `NodeItem` and `ValueItem` to a top level
- Plugins are removed from Context constructor and added lazily in ContextBuilder
- \[Major breaking change\] Full refactor of DataTree/DataSource
- \[Major Breaking change\] Replace KClass with KType in data. Remove direct access to constructors with types.

## [0.2.0]
### Changed
- Context content resolution refactor
- Kotlin 1.4.10 (build tools 0.6.0)
- Empty query in Name is null instead of ""
- Provider provides an empty map instead of error by default
- Hidden delegates hierarchy in favor of stdlib properties
- Removed io depdendency from `dataforge-output`. Replaced Output by Appendable.
- Configurable is no longer MutableItemProvider. All functionality moved to Scheme.


### Deprecated
- Context activation API
- TextRenderer


### Removed
- Functional server prototype
- `dataforge-output` module


### Fixed
- Global context CoroutineScope resolution
- Library mode compliance