Created
October 31, 2018 04:59
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Fully Type Checked and Filtered configuration context for components
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type PropertyNames<T> = keyof T | |
type Omit<T, K extends keyof T> = Pick<T, Exclude<keyof T, K>> | |
type Filtered<T, C> = { [K in keyof T]: T[K] extends C ? K : never }[keyof T] | |
class ConfigurationPageContext<T> { | |
addTextSetting<K extends PropertyNames<T>>( | |
field: Extract<K, Filtered<T, string>>, | |
title: string, | |
defaultValue: string = null | |
): ConfigurationPageContext<Omit<T, K>> { | |
return this | |
} | |
addCheckboxSetting<K extends PropertyNames<T>>( | |
field: Extract<K, Filtered<T, boolean>>, | |
title: string, | |
defaultValue: string = null | |
): ConfigurationPageContext<Omit<T, K>> { | |
return this | |
} | |
addRangeSetting<K extends PropertyNames<T>>( | |
field: Extract<K, Filtered<T, number>>, | |
title: string, | |
defaultValue: string = null | |
): ConfigurationPageContext<Omit<T, K>> { | |
return this | |
} | |
addQuerySetting<K extends PropertyNames<T>>( | |
field: Extract<K, Filtered<T, string>>, | |
title: string, | |
defaultValue: string = null | |
): ConfigurationPageContext<Omit<T, K>> { | |
return this | |
} | |
addTextAreaSetting<K extends PropertyNames<T>>( | |
field: Extract<K, Filtered<T, string>>, | |
title: string, | |
defaultValue: string = null | |
): ConfigurationPageContext<Omit<T, K>> { | |
return this | |
} | |
addDescription(description: string): this { | |
return this | |
} | |
} | |
class ComponentConfigurationContext<T> { | |
addSettingsPage(pageCallback: (pageContext: ConfigurationPageContext<T>) => void) {} | |
} | |
abstract class SomeComponentBase<Props> { | |
abstract configure(context: ComponentConfigurationContext<Props>) | |
} | |
const defaultGraphQlQuery = ` | |
query { | |
someQuery( $a: string ) { | |
id | |
name | |
value | |
} | |
} | |
` | |
interface ComponentProps { | |
name: string | |
title: string | |
max: number | |
valid: boolean | |
query: string | |
} | |
class PatricksComponent extends SomeComponentBase<ComponentProps> { | |
configure(context: ComponentConfigurationContext<ComponentProps>) { | |
context.addSettingsPage(page => | |
page | |
.addTextSetting('name', 'Name') | |
.addCheckboxSetting('valid', 'Is Valid') | |
.addDescription('Heads Up: The query must retuirn `id` and `name`') | |
.addQuerySetting('query', 'GraphQL query', defaultGraphQlQuery) | |
.addRangeSetting('max', 'Range') | |
) | |
} | |
} |
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