Services/SearchService.cs


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using Microsoft.EntityFrameworkCore;

namespace HyperBooru.Services;

public interface ISearchService {
    public Media[] Search(string query);
}

public class SearchService : ISearchService {
    private IDbContextFactory<HBContext> dbFactory;

    public SearchService(IDbContextFactory<HBContext> dbFactory) =>
        this.dbFactory = dbFactory;

    public Media[] Search(string query) {
        var db = dbFactory.CreateDbContext();

        query = query.ToLower();

        var matchedTag = db.TagDefinitions
            .FirstOrDefault(td => td.Name.ToLower() == query)?.Guid;
        if(matchedTag is not null)
            return db.Media
                .Include(m => m.Tags)
                .ThenInclude(t => t.TagDefinition)
                .Where(m => m.Tags
                    .Select(t => t.TagDefinition)
                    .Select(td => td.Guid)
                    .Contains((Guid) matchedTag))
                .ToArray();

        var matchingTags = db.TagDefinitions
            .Where(td => td.Name.ToLower().Contains(query))
            .Select(td => td.Guid);

        throw new NotImplementedException();
    }
}