Bimba.git

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218

// SPDX-FileCopyrightText: Adam Evyčędo
//
// SPDX-License-Identifier: GPL-3.0-or-later

package xyz.apiote.bimba.czwek.repo

import android.content.Context
import android.database.sqlite.SQLiteDatabase
import androidx.core.content.edit
import androidx.core.database.sqlite.transaction
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.withContext
import xyz.apiote.bimba.czwek.api.Server
import xyz.apiote.fruchtfleisch.Reader
import xyz.apiote.fruchtfleisch.Writer
import java.io.File
import java.net.URLEncoder
import java.time.LocalDate

class OfflineRepository(context: Context) : Repository {
	private val db =
		SQLiteDatabase.openOrCreateDatabase(context.getDatabasePath("favourites").path, null)

	fun saveFeedCache(context: Context, feedInfos: Map<String, FeedInfo>) {
		val file = File(
			context.filesDir, URLEncoder.encode(Server.get(context).apiPath, "utf-8")
		)
		context.getSharedPreferences("offlineFeeds", Context.MODE_PRIVATE).edit {
			putInt("version", FeedInfo.VERSION.toInt())
		}
		val stream = file.outputStream()
		val writer = Writer(stream)
		writer.writeUInt(feedInfos.size.toULong())
		feedInfos.forEach {
			it.value.marshal(stream)
		}
		stream.flush()
		stream.close()
	}

	override suspend fun getFavourite(stopCode: String): Favourite? {
		val cursor =
			db.rawQuery(
				"select sequence, stop_name, feed_id, feed_name, lines from favourites where stop_code = ?",
				listOf(stopCode).toTypedArray()
			)
		if (cursor.count == 0) {
			return null
		}
		cursor.moveToNext()
		val f = Favourite(
			cursor.getInt(0),
			cursor.getString(2),
			cursor.getString(3),
			stopCode,
			cursor.getString(1),
			cursor.getString(4).split("||").filter { it != "" }
		)
		cursor.close()
		return f
	}

	override suspend fun getFavourites(feedIDs: Set<String>): List<Favourite> {
		val whereClause = if (feedIDs.isNotEmpty()) {
			feedIDs.indices.joinToString(prefix = "where feed_id in (", postfix = ")") { "?" }
		} else {
			""
		}
		val cursor =
			db.rawQuery(
				"select sequence, stop_name, feed_id, feed_name, stop_code, lines from favourites $whereClause order by sequence",
				feedIDs.toTypedArray()
			)
		val l = mutableListOf<Favourite>()
		while (cursor.moveToNext()) {
			l.add(
				Favourite(
					cursor.getInt(0),
					cursor.getString(2),
					cursor.getString(3),
					cursor.getString(4),
					cursor.getString(1),
					cursor.getString(5).split("||").filter { it != "" }
				)
			)
		}
		cursor.close()
		return l
	}

	override suspend fun saveFavourite(favourite: Favourite) {
		val sequence = favourite.sequence ?: run {
			val cursor =
				db.rawQuery("select max(ROWID) from favourites", emptyArray<String?>())
			val s = if (cursor.count == 0) {
				0
			} else {
				cursor.moveToNext()
				cursor.getInt(0)
			}
			cursor.close()
			s
		}

		// XXX `on conflict` is not supported on older versions of Android
		val cursor = db.rawQuery("select * from favourites where feed_id = ? and stop_code = ?", arrayOf(favourite.feedID, favourite.stopCode))
		if (cursor.count > 0) {
			db.execSQL("update favourites set stop_name = ?, lines = ?, sequence = ? where feed_id = ? and stop_code = ?", arrayOf(favourite.stopName, favourite.lines.joinToString(separator = "||"), favourite.sequence, favourite.feedID, favourite.stopCode))
		} else {
			db.execSQL(
				"insert into favourites(sequence, feed_id, feed_name, stop_code, stop_name, lines) values (?, ?,?,?,?,?)",
				arrayOf(
					sequence,
					favourite.feedID,
					favourite.feedName,
					favourite.stopCode,
					favourite.stopName,
					favourite.lines.joinToString(separator = "||"),
				)
			)
		}
		cursor.close()
	}

	override suspend fun saveFavourites(favourites: Set<Favourite>) {
		db.execSQL("delete from favourites")
		db.transaction {
			favourites.forEach {
				saveFavourite(it)
			}
		}
	}

	@Suppress("RedundantNullableReturnType")
	override suspend fun getFeeds(
		context: Context,
		server: Server
	): Map<String, FeedInfo>? {
		val file = File(
			context.filesDir, withContext(Dispatchers.IO) {
				URLEncoder.encode(server.apiPath, "utf-8")
			}
		)
		if (!file.exists()) {
			return emptyMap()
		}

		val version =
			context.getSharedPreferences("offlineFeeds", Context.MODE_PRIVATE).getInt("version", -1)
		if (version < 0) {
			return emptyMap()
		}
		val unmarshaller =
			if (version.toUInt() == FeedInfo.VERSION) FeedInfo::unmarshal else FeedInfoPrev::unmarshal
		val stream = file.inputStream()
		val feeds = mutableMapOf<String, FeedInfo>()
		val n = Reader(stream).readUInt().toULong().toInt()
		repeat(n) {
			val feed = unmarshaller(stream)
			feeds[feed.id] = feed
			if (version.toUInt() != FeedInfo.VERSION) {
				saveFeedCache(context, feeds)
			}
		}
		return feeds
	}

	override suspend fun getDepartures(
		feedID: String,
		stop: String,
		date: LocalDate?,
		context: Context,
		limit: Int?
	): StopDepartures? {
		TODO("Not yet implemented")
	}

	override suspend fun getLocatablesIn(
		context: Context,
		bl: Position,
		tr: Position,
	): List<Locatable>? {
		TODO("Not yet implemented")
	}

	override suspend fun getLine(
		context: Context,
		feedID: String,
		lineName: String,
		lineID: String,
	): Line? {
		TODO("Not yet implemented")
	}

	override suspend fun queryQueryables(
		query: String,
		context: Context
	): List<Queryable>? {
		TODO("Not yet implemented")
	}

	override suspend fun locateQueryables(
		position: Position,
		context: Context
	): List<Queryable>? {
		TODO("Not yet implemented")
	}

	fun close() {
		db.close()
	}
}


fun migrateDB(context: Context) {
	val db = SQLiteDatabase.openOrCreateDatabase(context.getDatabasePath("favourites").path, null)
	db.execSQL("create table if not exists favourites(sequence integer, feed_id text, feed_name text, stop_code text, stop_name text, lines text, primary key(feed_id, stop_code))")
}