feat: migrate LightningAddressStore to DataStore

2026-06-02 01:57:29 +02:00
parent 54e06506ae
commit fabf18760d
5 changed files with 101 additions and 21 deletions
@@ -55,13 +55,4 @@ class BalancePrefsStore(context: Context) {
            else remove("fiat_currency")
        }
    }
-
-    // ── Lightning address ─────────────────────────────────────────────────────
-
-    val lightningAddress: String?
-        get() = prefs.getString("lightning_address", null)
-
-    fun setLightningAddress(address: String) {
-        prefs.edit { putString("lightning_address", address) }
-    }
 }
@@ -0,0 +1,72 @@
+package com.bitcointxoko.gudariwallet.data
+
+import android.content.Context
+import android.util.Log
+import androidx.datastore.core.DataStore
+import androidx.datastore.preferences.core.Preferences
+import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.core.emptyPreferences
+import androidx.datastore.preferences.core.longPreferencesKey
+import androidx.datastore.preferences.core.stringPreferencesKey
+import androidx.datastore.preferences.preferencesDataStore
+import com.bitcointxoko.gudariwallet.util.WalletConstants.LNADDRESS_TTL_MS
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.catch
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
+import java.io.IOException
+
+private val Context.lightningAddressDataStore: DataStore<Preferences>
+        by preferencesDataStore(name = "lightning_address")
+
+class LightningAddressStore(private val context: Context) {
+
+    companion object {
+        private val KEY_ADDRESS    = stringPreferencesKey("lightning_address")
+        private val KEY_FETCHED_AT = longPreferencesKey("lightning_address_fetched_at")
+    }
+
+    // In-memory snapshot — safe for ClipboardViewModel's synchronous lambda
+    @Volatile private var _currentAddress: String? = null
+    val currentAddress: String? get() = _currentAddress
+
+    val lightningAddressFlow: Flow<String?> = context.lightningAddressDataStore.data
+        .catch { e ->
+            if (e is IOException) emit(emptyPreferences())
+            else throw e
+        }
+        .map { prefs ->
+            prefs[KEY_ADDRESS].also { address ->
+                _currentAddress = address
+                Log.d("LightningAddressStore", "LNADDR [CACHE   ] read from cache: " +
+                        if (address != null) "\"$address\"" else "(empty — nothing cached yet)")            }
+        }
+
+    suspend fun isCacheStale(): Boolean {
+        return context.lightningAddressDataStore.data
+            .catch { e ->
+                if (e is IOException) emit(emptyPreferences())
+                else throw e
+            }
+            .map { prefs ->
+                val address   = prefs[KEY_ADDRESS]
+                val fetchedAt = prefs[KEY_FETCHED_AT] ?: 0L
+                val age       = System.currentTimeMillis() - fetchedAt
+                val isStale   = address == null || age > LNADDRESS_TTL_MS
+                Log.d("LightningAddressStore", "LNADDR [TTL     ] cached=${address != null} " +
+                        "age=${age / 1000}s ttl=${LNADDRESS_TTL_MS / 1000}s " +
+                        if (isStale) "→ cache stale, will fetch from API"
+                        else         "→ cache fresh, skipping API call")
+                isStale
+            }
+            .first()
+    }
+
+    suspend fun setLightningAddress(address: String) {
+        context.lightningAddressDataStore.edit { prefs ->
+            prefs[KEY_ADDRESS]    = address
+            prefs[KEY_FETCHED_AT] = System.currentTimeMillis()   // ← add
+        }
+    }
+}
+