Fixed crash with FilePicker when cancelled.
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alphafetus committed
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@@ -0,0 +1,222 @@
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using System;
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using System.Collections.Generic;
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using System.Data.SQLite;
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using PcgsInvUi.Models;
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namespace PcgsInvUi.Services;
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public class CoinDatabase {
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public SQLiteConnection Connection { get; set; }
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private Boolean IsConnected { get; set; }
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public CoinDatabase() {
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// Create a connection to SQLite
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Connection = CreateConnection();
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// Create a base table.
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CreateCollection("CollectionTable");
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Console.WriteLine("Connected to database.");
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}
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private SQLiteConnection CreateConnection() {
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// Create a connection.
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SQLiteConnection connection =
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new SQLiteConnection("DataSource=C:\\Users\\lvas4\\coin_collection");
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// Open the connection.
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try {
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connection.Open();
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IsConnected = true;
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}
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catch (Exception e) {
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Console.WriteLine(e.Message);
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}
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return connection;
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}
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public void CreateCollection(string collectionName) {
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// Create a table to store the collection.
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if (!IsConnected) {
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// TODO Create a NotConnectedToDatabaseException
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Console.WriteLine("Not connected to database.");
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return;
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}
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// Create a SQL command.
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SQLiteCommand cmd = Connection.CreateCommand();
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cmd.CommandText =
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$"CREATE TABLE IF NOT EXISTS {collectionName} (" +
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"PCGS_NUMBER TEXT," +
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"GRADE TEXT" +
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"NAME TEXT," +
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"YEAR INTEGER," +
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"DENOMINATION TEXT," +
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"MINT_MARK TEXT," +
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"PRICE_GUIDE_VALUE REAL," +
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"COIN_FACTS_LINK TEXT," +
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"MAJOR_VARIETY TEXT," +
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"MINOR_VARIETY TEXT," +
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"DIE_VARIETY TEXT," +
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"SERIES_NAME TEXT," +
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"CATEGORY TEXT," +
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"DESIGNATION TEXT," +
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"CERT_NUM INTEGER," +
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"QUANTITY INTEGER," +
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"PRIMARY KEY(PCGS_NUMBER, GRADE))";
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// Execute the command.
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cmd.ExecuteNonQuery();
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}
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public void InsertCoin(Coin newCoin) {
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// Use our existing connection to insert a coin to the database.
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if (!IsConnected) {
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// TODO Create a NotConnectedToDatabaseException
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Console.WriteLine("Not connected to database.");
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return;
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}
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// Create a SQL command.
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SQLiteCommand cmd = Connection.CreateCommand();
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cmd.CommandText =
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"INSERT INTO CollectionTable (PCGS_NUMBER, GRADE, YEAR," +
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"DENOMINATION, MINT_MARK, PRICE_GUIDE_VALUE, COIN_FACTS_LINK," +
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"MAJOR_VARIETY, MINOR_VARIETY, DIE_VARIETY, SERIES_NAME, CATEGORY, DESIGNATION," +
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"CERT_NUM, QUANTITY) " +
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"VALUES (@PcgsNumber, @Grade, @Year, @Denomination, @MintMark, @PriceGuideValue," +
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"@CoinFactsLink, @MajorVariety, @MinorVariety, @DieVariety, @SeriesName, @Category, @Designation," +
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"@CertificateNumber, @Quantity)";
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cmd.Parameters.AddWithValue("@PcgsNumber", newCoin.PCGSNo);
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cmd.Parameters.AddWithValue("@Grade", newCoin.Grade);
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cmd.Parameters.AddWithValue("@Year", newCoin.Year);
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cmd.Parameters.AddWithValue("@Denomination", newCoin.Denomination);
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cmd.Parameters.AddWithValue("@MintMark", newCoin.MintMark);
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cmd.Parameters.AddWithValue("@PriceGuideValue", newCoin.PriceGuideValue);
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cmd.Parameters.AddWithValue("@CoinFactsLink", newCoin.CoinFactsLink);
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cmd.Parameters.AddWithValue("@MajorVariety", newCoin.MajorVariety);
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cmd.Parameters.AddWithValue("@MinorVariety", newCoin.MinorVariety);
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cmd.Parameters.AddWithValue("@DieVariety", newCoin.DieVariety);
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cmd.Parameters.AddWithValue("@SeriesName", newCoin.SeriesName);
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cmd.Parameters.AddWithValue("@Category", newCoin.Category);
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cmd.Parameters.AddWithValue("@Designation", newCoin.Designation);
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cmd.Parameters.AddWithValue("@CertificateNumber", newCoin.CertificateNumber);
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cmd.Parameters.AddWithValue("@Quantity", newCoin.Quantity);
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// Execute the command.
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cmd.ExecuteNonQuery();
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}
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public List<Coin> GetCollection(string collectionName) {
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SQLiteCommand cmd = Connection.CreateCommand();
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cmd.CommandText = $"SELECT * FROM {collectionName}";
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var coins = new List<Coin>();
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using (var reader = cmd.ExecuteReader()) {
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while (reader.Read()) {
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// Create coin from reader then add to list.
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coins.Add(CoinFromReader(reader));
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}
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}
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return coins;
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}
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public String CollectionToCSV(string collectionName) {
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var cmd = Connection.CreateCommand();
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cmd.CommandText = $"SELECT * FROM {collectionName}";
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var headersCommand = Connection.CreateCommand();
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headersCommand.CommandText = $"PRAGMA table_info({collectionName})";
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var resultString = "";
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var numHeaders = 0;
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// Get the headers.
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using (var reader = headersCommand.ExecuteReader()) {
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while (reader.Read()) {
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resultString += reader.GetString(1) + ",";
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numHeaders++;
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}
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}
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resultString += "\n";
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// Is there a more efficient way of doing this? This is running at O(n^2) time.
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using (var reader = cmd.ExecuteReader()) {
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while (reader.Read()) {
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// Read information from the reader, then add to CSV string.
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for (int i = 0; i < numHeaders; i++) {
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// Get the type of each column.
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var type = reader.GetFieldType(i);
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Console.WriteLine("Type: " + type);
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if (type == typeof(Int64)) {
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resultString += reader.GetInt32(i) + ",";
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}
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else if (type == typeof(Double)) {
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resultString += reader.GetDouble(i) + ",";
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}
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else if (type == typeof(String)) {
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resultString += reader.GetString(i) + ",";
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}
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else {
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resultString += "NULL" + ",";
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}
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}
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resultString += "\n";
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}
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}
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return resultString;
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}
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public Coin? GetCoin(int pcgsNumber, string grade) {
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// Get the coin based off of the pcgs number.
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SQLiteCommand cmd = Connection.CreateCommand();
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cmd.CommandText = "SELECT * FROM CollectionTable WHERE Id = @Id AND Grade = @Grade";
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cmd.Parameters.AddWithValue("@Id", pcgsNumber);
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cmd.Parameters.AddWithValue("@Grade", grade);
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Coin? returnCoin = null;
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// Execute the command.
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using (var reader = cmd.ExecuteReader()) {
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while (reader.Read()) {
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returnCoin = CoinFromReader(reader);
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}
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}
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return returnCoin;
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}
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private Coin CoinFromReader(SQLiteDataReader reader) {
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Coin coin = new Coin();
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coin.PCGSNo = reader.GetString(0);
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coin.Grade = reader.GetString(1);
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coin.Year = reader.GetInt32(2);
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coin.Denomination = reader.GetString(3);
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coin.MintMark = reader.GetString(4);
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coin.PriceGuideValue = reader.GetDouble(5);
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coin.CoinFactsLink = reader.GetString(6);
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coin.MajorVariety = reader.GetString(7);
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coin.MinorVariety = reader.GetString(8);
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coin.DieVariety = reader.GetString(9);
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coin.SeriesName = reader.GetString(10);
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coin.Category = reader.GetString(11);
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coin.Designation = reader.GetString(12);
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coin.CertificateNumber = reader.GetInt32(13);
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coin.Quantity = reader.GetInt32(14);
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coin.TotalPrice = coin.Quantity * coin.PriceGuideValue;
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return coin;
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}
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public void DeleteCoin(Coin delCoin) {
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SQLiteCommand cmd = Connection.CreateCommand();
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cmd.CommandText = "DELETE FROM CollectionTable WHERE PCGS_NUMBER = @PcgsNumber AND GRADE = @Grade";
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cmd.Parameters.AddWithValue("@PcgsNumber", delCoin.PCGSNo);
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cmd.Parameters.AddWithValue("@Grade", delCoin.Grade);
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cmd.ExecuteNonQuery();
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}
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}
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