Zakhar Timoshenko
29df0aa61f
- Introduced a new feature for managing tasks and notes associated with lessons. - Added a `NotesStore` class to handle local storage of notes in JSON format. - Implemented UI components for displaying, adding, editing, and deleting notes. - Enhanced the `HomeScreen`, `ScheduleScreen`, and `SubjectsScreen` to integrate notes functionality. - Updated the API to handle versioning and added error handling for outdated endpoints. - Improved the overall user experience with visual indicators for tasks and notes in the schedule.
60 lines
2.0 KiB
Kotlin
60 lines
2.0 KiB
Kotlin
package ritm.schedule.data
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import android.content.Context
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import kotlinx.coroutines.Dispatchers
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import kotlinx.coroutines.flow.MutableStateFlow
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import kotlinx.coroutines.flow.StateFlow
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import kotlinx.coroutines.sync.Mutex
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import kotlinx.coroutines.sync.withLock
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import kotlinx.coroutines.withContext
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import kotlinx.serialization.Serializable
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import java.io.File
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import java.util.UUID
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/**
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* A homework task or a plain note the student pinned to one lesson: the subject,
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* the lesson's date and start time. Tasks can be ticked off; notes just remind.
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*/
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@Serializable
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data class Note(
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val id: String = UUID.randomUUID().toString(),
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/** "docId|group": notes of one group never show up in another. */
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val group: String,
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val subject: String,
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val date: String,
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val start: String,
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val text: String,
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val task: Boolean = true,
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val done: Boolean = false,
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val created: Long = System.currentTimeMillis(),
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)
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fun groupKey(g: SavedGroup) = "${g.docId}|${g.group}"
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/** Notes live only on the device, in one small JSON file. */
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class NotesStore(context: Context) {
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private val file = File(context.filesDir, "notes.json")
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private val lock = Mutex()
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private val _notes = MutableStateFlow(read())
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val notes: StateFlow<List<Note>> = _notes
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private fun read(): List<Note> =
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runCatching { json.decodeFromString<List<Note>>(file.readText()) }.getOrDefault(emptyList())
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private suspend fun change(block: (List<Note>) -> List<Note>) = withContext(Dispatchers.IO) {
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lock.withLock {
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val next = block(_notes.value)
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file.writeText(json.encodeToString(next))
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_notes.value = next
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}
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}
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suspend fun save(note: Note) = change { list ->
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if (list.any { it.id == note.id }) list.map { if (it.id == note.id) note else it } else list + note
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}
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suspend fun delete(id: String) = change { list -> list.filterNot { it.id == id } }
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suspend fun toggle(id: String) = change { list -> list.map { if (it.id == id) it.copy(done = !it.done) else it } }
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}
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