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Make source ID generation function reusable to extensions (#9836)

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* Make source ID generation function reusable to extensions.

* Add parameters and return documentation.
This commit is contained in:
Alessandro Jean 2023-08-11 23:29:56 -03:00 committed by GitHub
parent 8a6a104987
commit 3411ac40c0
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1 changed files with 31 additions and 8 deletions
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39
source-api/src/commonMain/kotlin/eu/kanade/tachiyomi/source/online/HttpSource.kt
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@ -43,15 +43,16 @@ abstract class HttpSource : CatalogueSource {
open val versionId = 1
/**
* Id of the source. By default it uses a generated id using the first 16 characters (64 bits)
* of the MD5 of the string: sourcename/language/versionId
* Note the generated id sets the sign bit to 0.
* ID of the source. By default it uses a generated id using the first 16 characters (64 bits)
* of the MD5 of the string `"${name.lowercase()}/$lang/$versionId"`.
*
* The ID is generated by the [generateId] function, which can be reused if needed
* to generate outdated IDs for cases where the source name or language needs to
* be changed but migrations can be avoided.
*
* Note: the generated ID sets the sign bit to `0`.
*/
override val id by lazy {
val key = "${name.lowercase()}/$lang/$versionId"
val bytes = MessageDigest.getInstance("MD5").digest(key.toByteArray())
(0..7).map { bytes[it].toLong() and 0xff shl 8 * (7 - it) }.reduce(Long::or) and Long.MAX_VALUE
}
override val id by lazy { generateId(name, lang, versionId) }
/**
* Headers used for requests.
@ -64,6 +65,28 @@ abstract class HttpSource : CatalogueSource {
open val client: OkHttpClient
get() = network.client
/**
* Generates a unique ID for the source based on the provided [name], [lang] and
* [versionId]. It will use the first 16 characters (64 bits) of the MD5 of the string
* `"${name.lowercase()}/$lang/$versionId"`.
*
* Note: the generated ID sets the sign bit to `0`.
*
* Can be used to generate outdated IDs, such as when the source name or language
* needs to be changed but migrations can be avoided.
*
* @since extensions-lib 1.5
* @param name [String] the name of the source
* @param lang [String] the language of the source
* @param versionId [Int] the version ID of the source
* @return a unique ID for the source
*/
protected fun generateId(name: String, lang: String, versionId: Int): Long {
val key = "${name.lowercase()}/$lang/$versionId"
val bytes = MessageDigest.getInstance("MD5").digest(key.toByteArray())
return (0..7).map { bytes[it].toLong() and 0xff shl 8 * (7 - it) }.reduce(Long::or) and Long.MAX_VALUE
}
/**
* Headers builder for requests. Implementations can override this method for custom headers.
*/