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ImageRepository.page(id): constant time complexity

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This commit is contained in:
Pierre-Yves Nicolas
2026-01-12 17:57:20 +01:00
parent 3c68e08a03
commit aa9e3893b9
1 changed files with 19 additions and 14 deletions
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23
app/src/main/java/org/fairscan/app/data/ImageRepository.kt
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@@ -51,7 +51,10 @@ class ImageRepository(
private val metadataFile = File(scanDir, "document.json") private val metadataFile = File(scanDir, "document.json")
private var pages: MutableList<PageV2> = loadPages() private val pagesById = mutableMapOf<String, PageV2>()
private var pages: MutableList<PageV2> = loadPages().also {
pagesById.putAll(it.associateBy { p -> p.id })
}
private val json = Json { private val json = Json {
prettyPrint = false prettyPrint = false
@@ -125,8 +128,7 @@ class ImageRepository(
ScanPage(it.id, it.toMetadata()) ScanPage(it.id, it.toMetadata())
} }
// TODO time complexity should be constant private fun page(id: String): PageV2? = pagesById[id]
private fun page(id: String): PageV2? = pages.find { p -> p.id == id }
fun add(pageBytes: ByteArray, sourceBytes: ByteArray, metadata: PageMetadata) { fun add(pageBytes: ByteArray, sourceBytes: ByteArray, metadata: PageMetadata) {
val id = "${System.currentTimeMillis()}" val id = "${System.currentTimeMillis()}"
@@ -135,15 +137,15 @@ class ImageRepository(
file.writeBytes(pageBytes) file.writeBytes(pageBytes)
writeThumbnail(file) writeThumbnail(file)
File(sourceDir, fileName).writeBytes(sourceBytes) File(sourceDir, fileName).writeBytes(sourceBytes)
pages.add( val page = PageV2(
PageV2(
id = id, id = id,
quad = metadata.normalizedQuad.toSerializable(), quad = metadata.normalizedQuad.toSerializable(),
baseRotationDegrees = metadata.baseRotation.degrees, baseRotationDegrees = metadata.baseRotation.degrees,
manualRotationDegrees = metadata.manualRotation.degrees, manualRotationDegrees = metadata.manualRotation.degrees,
isColored = metadata.isColored isColored = metadata.isColored
) )
) pagesById[page.id] = page
pages.add(page)
saveMetadata() saveMetadata()
} }
@@ -183,9 +185,9 @@ class ImageRepository(
transformations.rotate(inputFile, outputFile, clockwise) transformations.rotate(inputFile, outputFile, clockwise)
} }
pages[index] = page.copy( val updated = page.copy(manualRotationDegrees = newManualRotation.degrees)
manualRotationDegrees = newManualRotation.degrees, pagesById[id] = updated
) pages[index] = updated
saveMetadata() saveMetadata()
} }
@@ -248,6 +250,7 @@ class ImageRepository(
return return
pages.removeAt(index) pages.removeAt(index)
saveMetadata() saveMetadata()
pagesById.remove(id)
getSourceFile(id).delete() getSourceFile(id).delete()
scanDir.listFiles() scanDir.listFiles()
@@ -261,6 +264,8 @@ class ImageRepository(
fun clear() { fun clear() {
pages.clear() pages.clear()
saveMetadata() // "empty" json file saveMetadata() // "empty" json file
pagesById.clear()
thumbnailDir.listFiles()?.forEach { thumbnailDir.listFiles()?.forEach {
file -> file.delete() file -> file.delete()
} }