Updated on 2026-08-14
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Tangem
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21 changed files with 627 additions and 0 deletions
1
domain/search/.gitignore
vendored
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domain/search/.gitignore
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/build
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20
domain/search/build.gradle.kts
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domain/search/build.gradle.kts
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plugins {
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alias(deps.plugins.android.library)
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alias(deps.plugins.kotlin.android)
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id("configuration")
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}
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android {
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namespace = "com.tangem.domain.search"
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}
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dependencies {
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api(projects.domain.core)
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api(projects.domain.models)
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implementation(projects.domain.common)
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implementation(projects.domain.markets.models)
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implementation(projects.domain.wallets)
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implementation(projects.domain.appCurrency)
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implementation(projects.domain.account)
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implementation(projects.domain.account.status)
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}
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package com.tangem.domain.search.model
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import com.tangem.domain.models.currency.CryptoCurrency
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/**
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* @property timestamp epoch milliseconds
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*/
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data class RecentSearchToken(
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val id: CryptoCurrency.RawID,
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val name: String,
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val symbol: String,
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val imageUrl: String?,
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val timestamp: Long,
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)
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package com.tangem.domain.search.model
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import com.tangem.domain.markets.TokenMarket
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data class SearchResult(
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val textHints: List<SearchTextHint>,
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val recentTokens: List<RecentSearchToken>,
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val userAssets: List<UserAssetSearchEntry>,
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val marketTokens: List<TokenMarket>,
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)
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package com.tangem.domain.search.model
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/**
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* @property timestamp epoch milliseconds
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*/
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data class SearchTextHint(val text: String, val timestamp: Long)
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package com.tangem.domain.search.model
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import com.tangem.domain.models.account.AccountId
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import com.tangem.domain.models.account.AccountName
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import com.tangem.domain.models.currency.CryptoCurrencyStatus
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import com.tangem.domain.models.wallet.UserWalletId
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data class UserAssetSearchEntry(
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val userWalletId: UserWalletId,
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val userWalletName: String,
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val accountId: AccountId,
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val accountName: AccountName,
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val currencyStatus: CryptoCurrencyStatus,
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)
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package com.tangem.domain.search.repository
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import com.tangem.domain.search.model.RecentSearchToken
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import com.tangem.domain.search.model.SearchTextHint
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import kotlinx.coroutines.flow.Flow
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/**
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* Repository responsible for managing local search history storage.
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* Handles persistence of user's past search queries and recently viewed market tokens.
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* Each history type is limited to 3 entries, sorted by timestamp in descending order.
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*/
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interface SearchRepository {
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/** Observes the list of saved text hints, sorted by timestamp descending. */
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fun getTextHints(): Flow<List<SearchTextHint>>
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/** Observes the list of recently viewed market tokens, sorted by timestamp descending. */
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fun getRecentTokens(): Flow<List<RecentSearchToken>>
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/**
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* Saves a text hint to the search history.
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* If the hint already exists, its timestamp is updated. Oldest entries are evicted when the limit is exceeded.
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*
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* @param text the search query text to save
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*/
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suspend fun saveTextHint(text: String)
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/**
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* Saves a recently viewed market token to the search history.
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* If a token with the same ID already exists, it is moved to the top. Oldest entries are evicted when the limit
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* is exceeded.
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*
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* @param token the market token entry to save
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*/
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suspend fun saveRecentToken(token: RecentSearchToken)
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/** Clears all search history, including both text hints and recent tokens. */
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suspend fun clearHistory()
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}
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package com.tangem.domain.search.usecase
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import com.tangem.domain.search.repository.SearchRepository
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/**
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* Clears the entire search history, removing both text hints and recently viewed tokens.
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*
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* @property searchRepository local search history storage
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*/
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class ClearSearchHistoryUseCase(
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private val searchRepository: SearchRepository,
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) {
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suspend operator fun invoke() {
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searchRepository.clearHistory()
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}
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}
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package com.tangem.domain.search.usecase
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import com.tangem.domain.account.models.AccountStatusList
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import com.tangem.domain.account.status.supplier.MultiAccountStatusListSupplier
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import com.tangem.domain.common.wallets.UserWalletsListRepository
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import com.tangem.domain.markets.TokenMarket
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import com.tangem.domain.models.account.filterCryptoPortfolio
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import com.tangem.domain.models.wallet.UserWallet
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import com.tangem.domain.models.wallet.UserWalletId
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import com.tangem.domain.models.wallet.isLocked
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import com.tangem.domain.search.model.SearchResult
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import com.tangem.domain.search.model.UserAssetSearchEntry
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import com.tangem.domain.search.repository.SearchRepository
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import kotlinx.coroutines.flow.Flow
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import kotlinx.coroutines.flow.combine
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import kotlinx.coroutines.flow.flowOf
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/**
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* Primary search use case that produces [SearchResult] based on the current query.
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*
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* Behavior depends on the query:
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* - **Empty query** — returns search history: text hints and recently viewed tokens.
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* - **Non-empty query** — performs the search across all unlocked user wallets,
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* matching currencies by name or symbol, and combines the results with externally provided market tokens.
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*
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* @property searchRepository local search history storage
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* @property multiAccountStatusListSupplier supplier for loaded account status lists across all wallets
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* @property userWalletsListRepository repository providing the list of user wallets
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*/
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class GetSearchResultsUseCase(
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private val searchRepository: SearchRepository,
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private val multiAccountStatusListSupplier: MultiAccountStatusListSupplier,
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private val userWalletsListRepository: UserWalletsListRepository,
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) {
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/**
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* Produces a [Flow] of [SearchResult] for the given [query].
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*
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* @param query the search query string; blank means "show history"
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* @param marketTokens external flow of market token search results (provided by presentation layer)
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*/
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operator fun invoke(
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query: String,
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marketTokens: Flow<List<TokenMarket>> = flowOf(emptyList()),
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): Flow<SearchResult> {
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return if (query.isBlank()) {
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observeHistory()
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} else {
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searchAssets(query, marketTokens)
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}
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}
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private fun observeHistory(): Flow<SearchResult> {
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return combine(
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searchRepository.getTextHints(),
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searchRepository.getRecentTokens(),
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) { hints, tokens ->
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SearchResult(
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textHints = hints,
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recentTokens = tokens,
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userAssets = emptyList(),
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marketTokens = emptyList(),
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)
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}
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}
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private fun searchAssets(query: String, marketTokens: Flow<List<TokenMarket>>): Flow<SearchResult> {
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return combine(
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observeUserAssets(query),
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marketTokens,
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) { userAssets, markets ->
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SearchResult(
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textHints = emptyList(),
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recentTokens = emptyList(),
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userAssets = userAssets,
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marketTokens = markets,
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)
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}
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}
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private fun observeUserAssets(query: String): Flow<List<UserAssetSearchEntry>> {
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val lowerQuery = query.lowercase()
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return combine(
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multiAccountStatusListSupplier(),
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userWalletsListRepository.userWallets,
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) { statusLists, wallets ->
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val unlockedWallets = wallets
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.orEmpty()
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.filterNot(UserWallet::isLocked)
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.associateBy { it.walletId }
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if (unlockedWallets.isEmpty()) return@combine emptyList()
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statusLists
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.filter { it.userWalletId in unlockedWallets }
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.flatMap { statusList -> extractMatchingAssets(statusList, unlockedWallets, lowerQuery) }
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}
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}
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private fun extractMatchingAssets(
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statusList: AccountStatusList,
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wallets: Map<UserWalletId, UserWallet>,
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lowerQuery: String,
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): List<UserAssetSearchEntry> {
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val wallet = wallets[statusList.userWalletId] ?: return emptyList()
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return statusList.accountStatuses
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.filterCryptoPortfolio()
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.flatMap { accountStatus ->
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accountStatus.flattenCurrencies()
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.filter { currencyStatus ->
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val name = currencyStatus.currency.name.lowercase()
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val symbol = currencyStatus.currency.symbol.lowercase()
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name.contains(lowerQuery) || symbol.contains(lowerQuery)
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}
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.map { currencyStatus ->
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UserAssetSearchEntry(
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userWalletId = statusList.userWalletId,
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userWalletName = wallet.name,
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accountId = accountStatus.accountId,
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accountName = accountStatus.account.accountName,
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currencyStatus = currencyStatus,
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)
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}
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}
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}
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}
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package com.tangem.domain.search.usecase
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import com.tangem.domain.search.model.RecentSearchToken
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import com.tangem.domain.search.repository.SearchRepository
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/**
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* Saves a market token to the "recently viewed" search history.
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* Only market assets should be saved (user's own assets are ignored).
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* The history is limited to 3 entries; oldest entries are evicted automatically.
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*
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* @property searchRepository local search history storage
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*/
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class SaveRecentSearchTokenUseCase(
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private val searchRepository: SearchRepository,
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) {
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/**
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* @param token the market token to persist as a recent search entry
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*/
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suspend operator fun invoke(token: RecentSearchToken) {
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searchRepository.saveRecentToken(token)
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}
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}
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package com.tangem.domain.search.usecase
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import com.tangem.domain.search.repository.SearchRepository
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/**
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* Saves the current search query text to the local search history.
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* Blank queries are ignored. The history is limited to 3 entries; oldest entries are evicted automatically.
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* Should be called when the user selects any asset from the search results.
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*
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* @property searchRepository local search history storage
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*/
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class SaveSearchQueryUseCase(
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private val searchRepository: SearchRepository,
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) {
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/**
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* @param query the search text to persist; blank values are silently ignored
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*/
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suspend operator fun invoke(query: String) {
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if (query.isBlank()) return
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searchRepository.saveTextHint(query.trim())
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}
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}
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