Add functionality to the Search funtion in the Transactions' toolbar, which fires events to filter the transactions list while the user types a search query.

app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/TransactionsFragment.kt

@@ -1,9 +1,12 @@
 package cy.agorise.bitsybitshareswallet.fragments
 
+import android.graphics.Point
 import android.os.Bundle
 import android.preference.PreferenceManager
 import android.view.*
+import androidx.appcompat.widget.SearchView
 import androidx.fragment.app.Fragment
+import androidx.fragment.app.FragmentActivity
 import androidx.lifecycle.Observer
 import androidx.lifecycle.ViewModelProviders
 import androidx.recyclerview.widget.LinearLayoutManager
@@ -14,15 +17,31 @@ import cy.agorise.bitsybitshareswallet.utils.BounceTouchListener
 import cy.agorise.bitsybitshareswallet.utils.Constants
 import cy.agorise.bitsybitshareswallet.viewmodels.TransferDetailViewModel
 import kotlinx.android.synthetic.main.fragment_transactions.*
+import java.util.*
+import kotlin.collections.ArrayList
 
-class TransactionsFragment : Fragment() {
+class TransactionsFragment : Fragment(), SearchView.OnQueryTextListener {
 
     private lateinit var mTransferDetailViewModel: TransferDetailViewModel
 
-    override fun onCreateView(
-        inflater: LayoutInflater, container: ViewGroup?,
-        savedInstanceState: Bundle?
-    ): View? {
+    private lateinit var transfersDetailsAdapter: TransfersDetailsAdapter
+
+    private val transfersDetails = ArrayList<TransferDetail>()
+    private val filteredTransfersDetails = ArrayList<TransferDetail>()
+
+    /** Variables used to filter the transaction items  */
+    private var filterQuery = ""
+    private var filterTransactionsDirection = 0
+    private var filterDateRangeAll = true
+    private var filterStartDate = 0L
+    private var filterEndDate = 0L
+    private var filterCryptocurrencyAll = true
+    private var filterCryptocurrency = "BTS"
+    private var filterFiatAmountAll = true
+    private var filterFromFiatAmount = 0L
+    private var filterToFiatAmount = 500L
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         setHasOptionsMenu(true)
 
         return inflater.inflate(R.layout.fragment_transactions, container, false)
@@ -34,23 +53,105 @@ class TransactionsFragment : Fragment() {
         val userId = PreferenceManager.getDefaultSharedPreferences(context)
             .getString(Constants.KEY_CURRENT_ACCOUNT_ID, "") ?: ""
 
-        // Configure TransferDetailViewModel to show the transaction history
-        mTransferDetailViewModel = ViewModelProviders.of(this).get(TransferDetailViewModel::class.java)
-
-        val transfersDetailsAdapter = TransfersDetailsAdapter(context!!)
+        transfersDetailsAdapter = TransfersDetailsAdapter(context!!)
         rvTransactions.adapter = transfersDetailsAdapter
         rvTransactions.layoutManager = LinearLayoutManager(context)
 
+        // Configure TransferDetailViewModel to fetch the transaction history
+        mTransferDetailViewModel = ViewModelProviders.of(this).get(TransferDetailViewModel::class.java)
+
         mTransferDetailViewModel.getAll(userId).observe(this, Observer<List<TransferDetail>> { transfersDetails ->
-            transfersDetailsAdapter.replaceAll(transfersDetails)
+            this.transfersDetails.clear()
+            this.transfersDetails.addAll(transfersDetails)
+            applyFilterOptions(false)
         })
 
-        // Sets custom touch listener to handle bounce/stretch effect
+        // Set custom touch listener to handle bounce/stretch effect
         val bounceTouchListener = BounceTouchListener(rvTransactions)
         rvTransactions.setOnTouchListener(bounceTouchListener)
+
+        // Initialize filter options
+        val calendar = Calendar.getInstance()
+        filterEndDate = calendar.timeInMillis / 1000
+        calendar.add(Calendar.MONTH, -2)
+        filterStartDate = calendar.timeInMillis / 1000
     }
 
     override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
         inflater.inflate(R.menu.menu_transactions, menu)
+
+        // Adds listener for the SearchView
+        val searchItem = menu.findItem(R.id.menuSearch)
+        val searchView = searchItem.actionView as SearchView
+        searchView.setOnQueryTextListener(this)
+
+        // Adjust SearchView width to avoid pushing other menu items out of the screen
+        searchView.maxWidth = getScreenWidth(activity) * 3 / 5
+    }
+
+    /**
+     * Returns the screen width in pixels for the given [FragmentActivity]
+     */
+    private fun getScreenWidth(activity: FragmentActivity?): Int {
+        if (activity == null)
+            return 200
+
+        val size = Point()
+        activity.windowManager.defaultDisplay.getSize(size)
+        return size.x
+    }
+
+    override fun onQueryTextChange(query: String): Boolean {
+        filterQuery = query.toLowerCase()
+        applyFilterOptions()
+        return true
+    }
+
+    override fun onQueryTextSubmit(query: String?) = false // Not needed since we are filtering as the user types
+
+    /**
+     * Filters the TransferDetail list given the user selected filter options.
+     * TODO move this to a background thread
+     */
+    private fun applyFilterOptions(scrollToTop: Boolean = true) {
+        // Clean the filtered list
+        filteredTransfersDetails.clear()
+
+        for (transferDetail in transfersDetails) {
+            // Filter by transfer direction
+            if (transferDetail.direction) { // Transfer sent
+                if (filterTransactionsDirection == 2)
+                // Looking for received transfers only
+                    continue
+            } else { // Transfer received
+                if (filterTransactionsDirection == 1)
+                // Looking for sent transactions only
+                    continue
+            }
+
+            // Filter by date range
+            if (!filterDateRangeAll && (transferDetail.date < filterStartDate || transferDetail.date > filterEndDate))
+                continue
+
+            // Filter by cryptocurrency
+            if (!filterCryptocurrencyAll && transferDetail.cryptoSymbol != filterCryptocurrency)
+                continue
+
+//            // Filter by fiat amount
+//            if (!filterFiatAmountAll && (transferDetail.fiatAmount < filterFromFiatAmount || transferDetail.fiatAmount > filterToFiatAmount))
+//                continue
+
+            // Filter by search query
+            val text = (transferDetail.from ?: "").toLowerCase() + (transferDetail.to ?: "").toLowerCase()
+            if (text.contains(filterQuery, ignoreCase = true)) {
+                filteredTransfersDetails.add(transferDetail)
+            }
+        }
+
+        // Replaces the list of TransferDetail items with the new filtered list
+        transfersDetailsAdapter.replaceAll(filteredTransfersDetails)
+
+        if (scrollToTop)
+            rvTransactions.scrollToPosition(0)
     }
 }