interviews_InfoTrack/backend/SolicitorsApi/Program.cs

using System.ComponentModel;
using Microsoft.AspNetCore.Mvc;
using Solicitors.CacheBuild;
using Solicitors.Core;
using Solicitors.Core.Misc;
using Solicitors.Core.Models;
using Solicitors.Data;
using Solicitors.Data.RepositorySetup.Sqlite;
using Solicitors.HtmlParsing;


var builder = WebApplication.CreateBuilder(args);

builder.Services.AddOpenApi();
builder.Services.AddCore();
builder.Services.AddData(new SqliteDbSetupOptions("demo"));
builder.Services.AddCacheBuild();
builder.Services.AddHtmlParsing();
builder.Services.AddHttpClient();
builder.Services.AddCors(options =>
{
    options.AddDefaultPolicy(policy => policy.AllowAnyHeader().AllowAnyMethod().AllowAnyOrigin());
});

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.MapOpenApi();
}

app.UseHttpsRedirection();
app.UseCors();

app.MapGet(
    "/conveyancors", 
    (
        [FromServices] IReadOnlySolicitorService solicitorService,
        CancellationToken cancellationToken,
        [FromQuery] uint pageNumber = 1,
        [FromQuery] uint pageSize = 20,
        [FromQuery] string? nameFilter = null,
        [FromQuery] decimal minRating = 0,
        [FromQuery] string[]? cities = null,
        [FromQuery] string ratingsProvider = "Solicitors.com",
        [FromQuery] string? orderingType = null) =>
    {
        IFilter<Solicitor>? filter = null;

        if (!string.IsNullOrEmpty(nameFilter))
            filter = new WrapperFilter<Solicitor>(filter, solicitor => solicitor.Name.Contains(nameFilter));
        
        if (cities is not null && cities.Length > 0)
            filter = new WrapperFilter<Solicitor>(filter, solicitor => cities.Any(city => solicitor.Cities.Any(solCity => solCity.Name == city)));

        if (minRating > 0)
            filter = new WrapperFilter<Solicitor>(
                filter,
                solicitor => solicitor.Ratings.Any(rating => (rating.Provider == ratingsProvider) && (rating.Value / rating.Maximum >= minRating / 5.0m)));

        IComparer<Solicitor>? ordering = orderingType switch
        {
            "rating-asc" => new RatingComparer(ratingsProvider, true),
            "rating-desc" => new RatingComparer(ratingsProvider, false),
            "alphabet-asc" => new NameComparer(true),
            "alphabet-desc" => new NameComparer(false),
            _ => null
        };
        
        return solicitorService.GetSolicitorSummariesAsync(
            new Pagination(pageNumber, pageSize),
            ratingsProvider,
            filter,
            ordering,
            cancellationToken: cancellationToken);
    }
);

app.MapGet(
    "/cities",
    (
        [FromServices] IReadOnlyCitiesService citiesService,
        CancellationToken cancellationToken) =>
    {
        return citiesService.GetAllCitiesAsync(cancellationToken);
    }
);

app.MapGet(
    "/conveyancors/{id}",
    (
        [FromServices] IReadOnlySolicitorService solicitorService,
        [FromRoute] Guid id,
        CancellationToken cancellationToken
    ) => solicitorService.GetSolicitorInfoByIdAsync(id, cancellationToken)
);

app.MapGet(
    "/ratingsProviders",
    (
        [FromServices] IRatingsProviderService service,
        CancellationToken cancellationToken
    ) =>
    {
        return service.GetRatingsProvidersAsync(cancellationToken);
    }
);

using (var scope = app.Services.CreateScope())
{
    var solicitors = scope.ServiceProvider.GetRequiredService<ISolicitorService>();
    var first = await solicitors
        .GetSolicitorSummariesAsync(
            new Pagination(1, 1),
            "Solicitors.com",
            cancellationToken: CancellationToken.None);
    if (first.Data.Length == 0)
        await scope.ServiceProvider
            .GetRequiredService<ISolicitorImporter>()
            .RunFullImport(CancellationToken.None);
}

app.Run();

public class RatingComparer(string ratingsProvider, bool ascending) : IComparer<Solicitor>
{
    public int Compare(Solicitor? x, Solicitor? y)
    {
        var xRating = x?.Ratings?.FirstOrDefault(r => r.Provider == ratingsProvider);
        var yRating = y?.Ratings?.FirstOrDefault(r => r.Provider == ratingsProvider);

        decimal compare;
        
        if (xRating is null)
            compare = yRating is null ? 0 : 1;
        else if (yRating is null)
            compare = -1;
        else
        {
            compare = (xRating.Value / xRating.Maximum) - (yRating.Value / yRating.Maximum);

            if (!ascending)
                compare *= -1;
        }

        if (compare >= 0)
            return (int)Math.Ceiling(compare);
        else
            return (int)Math.Floor(compare);
        
    }
}

public class NameComparer(bool ascending) : IComparer<Solicitor>
{
    public int Compare(Solicitor? x, Solicitor? y)
    {
        int compare;
        if (ReferenceEquals(x, y)) 
            compare = 0;
        else if (y is null) 
            compare = 1;
        else if (x is null) 
            compare = -1;
        else
        {
            compare = string.Compare(x.Name, y.Name, StringComparison.OrdinalIgnoreCase);

            if (!ascending)
                compare *= -1;
        }

        return compare;
    }
}