37 lines
2.4 KiB
Markdown
37 lines
2.4 KiB
Markdown
# Application
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- It's mainly responsible for
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- creating and event based [application state](#application-state)
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- [parsing](#parsing) and [compiling](#compiling) [application data](#application-data)
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## Application state
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- [ApplicationContext.ts](./../src/application/Context/ApplicationContext.ts) holds the [CategoryCollectionState](./../src/application/Context/State/CategoryCollectionState.ts) for each OS
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- Uses [state pattern](https://en.wikipedia.org/wiki/State_pattern)
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- Same instance is shared throughout the application to ensure consistent state
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- 📖 See [Application State | Presentation layer](./presentation.md#application-state) to read more about how the state should be managed by the presentation layer.
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- 📖 See [ApplicationContext.ts](./../src/application/Context/ApplicationContext.ts) to start diving into the state code.
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## Application data
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- Compiled to [`Application`](./../src/domain/Application.ts) domain object.
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- The scripts are defined and controlled in different data files per OS
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- Enables [data-driven programming](https://en.wikipedia.org/wiki/Data-driven_programming) and easier contributions
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- Application data is defined in collection files and
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- 📖 See [Application data | Presentation layer](./presentation.md#application-data) to read how the application data is read by the presentation layer.
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- 📖 See [collection files documentation](./collection-files.md) to read more about how the data files are structured/defined and see [collection yaml files](./../src/application/collections/) to directly check the code.
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## Parsing
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- Application data is parsed to domain object [`Application.ts`](./../src/domain/Application.ts)
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- Steps
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1. (Compile time) Load application data from [collection yaml files](./../src/application/collections/) using webpack loader
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2. (Runtime) Parse and compile application and make it available to presentation layer by [`ApplicationFactory.ts`](./../src/application/ApplicationFactory.ts)
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### Compiling
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- Parsing the application files includes compiling scripts using [collection file defined functions](./collection-files.md#function)
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- To extend the syntax:
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1. Add a new parser under [SyntaxParsers](./../src/application/Parser/Script/Compiler/Expressions/SyntaxParsers) where you can look at other parsers to understand more.
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2. Register your in [CompositeExpressionParser](./../src/application/Parser/Script/Compiler/Expressions/Parser/CompositeExpressionParser.ts)
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