ref: 7b6047ea6c99eac164e6e40cf9837f49daa1d060
app/src/main/java/xyz/apiote/bimba/czwek/repo/OfflineRepository.kt
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 |
// 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 import xyz.apiote.bimba.czwek.R 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) } } val feedsWithTransitous = feeds.toMutableMap() feedsWithTransitous.put( "transitous", FeedInfo( "transitous", "Transitous", context.getString(R.string.transitous_description), context.getString(R.string.transitous_attribution), LocalDate.now(), "", QrLocation.NONE, "", null, null, false ) ) return feedsWithTransitous } override suspend fun getDepartures( feedID: String, stop: String, date: LocalDate?, context: Context, limit: Int? ): StopEvents? { 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))") } |