107 lines
3.7 KiB
C#
107 lines
3.7 KiB
C#
using Microsoft.EntityFrameworkCore;
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using Prefab.Data.Entities;
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using Prefab.Domain.Common;
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namespace Prefab.Data.Queries;
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/// <summary>
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/// Provides extension methods for the <see cref="GenericAttribute"/> entity.
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/// </summary>
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public static class GenericAttributeQueries
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{
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/// <summary>
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/// Query for records where the <see cref="GenericAttribute.EntityId"/> field matches the given entity.
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/// </summary>
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public static IQueryable<GenericAttribute> ForEntity(this IQueryable<GenericAttribute> query, IEntity<Guid> entity)
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{
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ArgumentNullException.ThrowIfNull(entity);
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return query.Where(x => x.EntityId == entity.Id && x.KeyGroup == entity.GetType().FullName);
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}
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/// <summary>
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/// Query for records in a module-specific view where the EntityId matches the given entity.
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/// </summary>
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public static IQueryable<TView> ForEntity<TView>(this IQueryable<TView> query, IEntity<Guid> entity, string keyGroup)
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where TView : class
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{
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return GenericAttributeViewQueries.ForEntity(query, entity, keyGroup);
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}
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/// <summary>
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/// Query for records where the <see cref="GenericAttribute.Value"/> field contains characters from the given string value.
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/// </summary>
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public static IQueryable<GenericAttribute> WhereTheValueContains(this IQueryable<GenericAttribute> query, string value)
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{
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return query.Where(x => x.Value.Contains(value));
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}
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/// <summary>
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/// Filter by key (exact match).
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/// </summary>
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private static IQueryable<GenericAttribute> WhereKey(
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this IQueryable<GenericAttribute> q, string key) =>
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q.Where(x => x.Key == key);
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/// <summary>
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/// Filter by key-group (exact match).
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/// </summary>
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public static IQueryable<GenericAttribute> WhereGroup(
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this IQueryable<GenericAttribute> q, string keyGroup) =>
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q.Where(x => x.KeyGroup == keyGroup);
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/// <summary>
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/// Filter by type (exact match).
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/// </summary>
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public static IQueryable<GenericAttribute> WhereType(
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this IQueryable<GenericAttribute> q, string type) =>
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q.Where(x => x.Type == type);
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/// <summary>
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/// Filter by any of the given keys.
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/// </summary>
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public static IQueryable<GenericAttribute> WhereKeys(
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this IQueryable<GenericAttribute> q, params string[] keys) =>
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q.Where(x => keys.Contains(x.Key));
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/// <summary>
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/// Case-insensitive substring search on Value using EF.Functions.Like.
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/// </summary>
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public static IQueryable<GenericAttribute> WhereValueLike(
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this IQueryable<GenericAttribute> q, string pattern) =>
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q.Where(x => EF.Functions.Like(x.Value, pattern));
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/// <summary>
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/// Project into a key→value dictionary.
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/// </summary>
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public static async Task<Dictionary<string, string>> ToDictionaryAsync(
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this IQueryable<GenericAttribute> q,
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CancellationToken ct = default)
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{
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return await q
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.Select(x => new { x.Key, x.Value })
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.ToDictionaryAsync(x => x.Key, x => x.Value, ct)
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.ConfigureAwait(false);
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}
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/// <summary>
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/// Shortcut to fetch a single attribute value (or null).
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/// </summary>
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public static async Task<string?> GetValueAsync(
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this IQueryable<GenericAttribute> q, string key, CancellationToken ct = default)
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{
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return await q
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.WhereKey(key)
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.Select(x => x.Value)
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.FirstOrDefaultAsync(ct)
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.ConfigureAwait(false);
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}
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/// <summary>
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/// Apply AsNoTracking for read-only queries.
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/// </summary>
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public static IQueryable<GenericAttribute> AsReadOnly(
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this IQueryable<GenericAttribute> q) =>
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q.AsNoTracking();
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} |