123 lines
4.4 KiB
C#
123 lines
4.4 KiB
C#
using Microsoft.Extensions.Options;
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using Npgsql;
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using Dapper;
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using OpenArchival.Core;
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namespace OpenArchival.Database;
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public class CategoryProvider : ICategoryProvider
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{
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private readonly NpgsqlDataSource _dataSource;
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public CategoryProvider(NpgsqlDataSource databaseConnection)
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{
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_dataSource = databaseConnection ?? throw new ArgumentNullException(nameof(databaseConnection), "Database connection cannot be null.");
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}
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public async Task<Category?> GetCategoryAsync(string categoryName)
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{
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await using var connection = await _dataSource.OpenConnectionAsync();
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var sql = @"SELECT * FROM Categories WHERE CategoryName = @CategoryName";
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return await connection.QueryFirstOrDefaultAsync<Category>(sql, new {CategoryName=categoryName});
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}
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public async Task<bool> RemoveCategory(string categoryName)
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{
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await using var connection = await _dataSource.OpenConnectionAsync();
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var sql = @"DELETE FROM Categories WHERE categoryname = @CategoryName";
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int rowsAffected = await connection.ExecuteAsync(sql, new { CategoryName = categoryName });
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return rowsAffected > 0;
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}
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public async Task<int?> GetCategoryId(string categoryName)
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{
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await using var connection = await _dataSource.OpenConnectionAsync();
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var sql = @"SELECT categoryid FROM Categories WHERE categoryname = @CategoryName";
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return await connection.QueryFirstOrDefaultAsync<int>(sql, new {CategoryName=categoryName});
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}
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public async Task<IEnumerable<Category>> AllCategories()
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{
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await using var connection = await _dataSource.OpenConnectionAsync();
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var sql = @"SELECT * FROM Categories;";
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return await connection.QueryAsync<Category>(sql);
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}
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public async Task<IEnumerable<Category>> SearchCategories(string searchQuery)
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{
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await using var connection = await _dataSource.OpenConnectionAsync();
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var sql = @"SELECT * FROM Categories WHERE POSITION(LOWER(@SearchQuery) in LOWER(categoryname)) > 0";
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return await connection.QueryAsync<Category>(sql, new {SearchQuery=searchQuery});
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}
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public async Task<IEnumerable<Category>> TopCategories(int numResults)
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{
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await using var connection = await _dataSource.OpenConnectionAsync();
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var sql = $@"SELECT * FROM Categories ORDER BY categoryname ASC LIMIT {numResults}";
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return await connection.QueryAsync<Category>(sql);
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}
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public async Task<int> InsertCategoryAsync(Category category)
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{
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await using var connection = await _dataSource.OpenConnectionAsync();
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var sql = @"INSERT INTO Categories (categoryname, fieldseparator, fieldnames, fielddescriptions) VALUES (@CategoryName, @FieldSeparator, @FieldNames, @FieldDescriptions)";
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return await connection.ExecuteAsync(sql, category);
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}
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public async Task<int> UpdateCategoryAsync(string oldCategoryName, Category category)
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{
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await using var connection = await _dataSource.OpenConnectionAsync();
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const string sql = @"
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UPDATE Categories
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SET
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categoryname = @CategoryName,
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fieldseparator = @FieldSeparator,
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fieldnames = @FieldNames,
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fielddescriptions = @FieldDescriptions
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WHERE categoryname = @OldCategoryName;";
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var parameters = new
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{
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category.CategoryName,
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category.FieldSeparator,
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category.FieldNames,
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category.FieldDescriptions,
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OldCategoryName = oldCategoryName
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};
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return await connection.ExecuteAsync(sql, parameters);
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}
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public async Task<int> InsertCategoryFieldOptionAsync(CategoryFieldOption option)
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{
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await using var connection = await _dataSource.OpenConnectionAsync();
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var sql = @"INSERT INTO CategoryFieldOptions (categoryid, fieldnumber, value, name, description) VALUES (@CategoryId, @FieldNumber, @Value, @Name, @Description)";
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return await connection.ExecuteAsync(sql, option);
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}
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public async Task<IEnumerable<CategoryFieldOption>> GetCategoryFieldOptionsAsync(int categoryId, int fieldNumber)
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{
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await using var connection = await _dataSource.OpenConnectionAsync();
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var sql = @"SELECT * FROM CategoryFieldOptions WHERE categoryid = @CategoryId AND fieldnumber = @FieldNumber";
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return await connection.QueryAsync<CategoryFieldOption>(sql, new {CategoryId = categoryId, FieldNumber = fieldNumber});
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}
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}
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