77 lines
2.8 KiB
Kotlin
77 lines
2.8 KiB
Kotlin
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package com.keylesspalace.tusky.db
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import androidx.room.*
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import com.keylesspalace.tusky.entity.Status
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/**
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* We're trying to play smart here. Server sends us reblogs as two entities one embedded into
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* another (reblogged status is a field inside of "reblog" status). But it's really inefficient from
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* the DB perspective and doesn't matter much for the display/interaction purposes.
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* What if when we store reblog we don't store almost empty "reblog status" but we store
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* *reblogged* status and we embed "reblog status" into reblogged status. This reversed
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* relationship takes much less space and is much faster to fetch (no N+1 type queries or JSON
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* serialization).
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* "Reblog status", if present, is marked by [reblogServerId], and [reblogAccountId]
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* fields.
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*/
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@Entity(
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primaryKeys = ["serverId", "timelineUserId"],
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foreignKeys = ([
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ForeignKey(
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entity = TimelineAccountEntity::class,
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parentColumns = ["serverId", "timelineUserId"],
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childColumns = ["authorServerId", "timelineUserId"]
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)
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]),
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// Avoiding rescanning status table when accounts table changes. Recommended by Room(c).
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indices = [Index("authorServerId", "timelineUserId")]
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)
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@TypeConverters(TootEntity.Converters::class)
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data class TimelineStatusEntity(
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val serverId: String, // id never flips: we need it for sorting so it's a real id
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val url: String?,
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// our local id for the logged in user in case there are multiple accounts per instance
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val timelineUserId: Long,
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val authorServerId: String?,
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val inReplyToId: String?,
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val inReplyToAccountId: String?,
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val content: String?,
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val createdAt: Long,
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val emojis: String?,
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val reblogsCount: Int,
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val favouritesCount: Int,
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val reblogged: Boolean,
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val favourited: Boolean,
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val sensitive: Boolean,
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val spoilerText: String?,
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val visibility: Status.Visibility?,
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val attachments: String?,
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val mentions: String?,
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val application: String?,
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val reblogServerId: String?, // if it has a reblogged status, it's id is stored here
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val reblogAccountId: String?
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)
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@Entity(
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primaryKeys = ["serverId", "timelineUserId"]
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)
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data class TimelineAccountEntity(
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val serverId: String,
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val timelineUserId: Long,
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val localUsername: String,
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val username: String,
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val displayName: String,
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val url: String,
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val avatar: String,
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val emojis: String
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)
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class TimelineStatusWithAccount {
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@Embedded
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lateinit var status: TimelineStatusEntity
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@Embedded(prefix = "a_")
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lateinit var account: TimelineAccountEntity
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@Embedded(prefix = "rb_")
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var reblogAccount: TimelineAccountEntity? = null
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}
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