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Add reverse geocoding for brewery street addresses (#245)

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* Add geocoding to seed application, remove postal codes from generator

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This commit is contained in:
Aaron Po
2026-08-23 23:53:56 -04:00
committed by Aaron Po
parent e738fe484a
commit cd5fd2d998
41 changed files with 2966 additions and 2297 deletions
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90
web/backend/Database/Database.Seed/Program.cs
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@@ -1,4 +1,5 @@
using Database.Seed.DatabaseHelpers;
using Database.Seed.Geocoding;
using Database.Seed.PipelineData;
using Database.Seed.Sqlite;
using Domain.Entities;
@@ -16,6 +17,9 @@ using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Spectre.Console;
const string NominatimUserAgent =
"TheBiergartenApp-Seeder/1.0 (+https://github.com/aaronpo97/the-biergarten-app)";
return await RunAsync();
static async Task<int> RunAsync()
@@ -100,23 +104,34 @@ static async Task<int> RunAsync()
}
);
await AnsiConsole
.Status()
.Spinner(Spinner.Known.Dots)
.SpinnerStyle(Style.Parse("green"))
.StartAsync(
"Loading brewery data into target database...",
async ctx =>
{
await LoadBreweriesIntoDatabaseAsync(
breweryRepository,
locationRepository,
seedData.Breweries,
postedByIds
);
ctx.Status("Brewery data loaded into target database.");
}
);
List<string> geocodingWarnings = [];
using (NominatimReverseGeocoder geocoder = new(NominatimUserAgent))
{
await AnsiConsole
.Status()
.Spinner(Spinner.Known.Dots)
.SpinnerStyle(Style.Parse("green"))
.StartAsync(
"Loading brewery data into target database...",
async ctx =>
{
await LoadBreweriesIntoDatabaseAsync(
breweryRepository,
locationRepository,
geocoder,
seedData.Breweries,
postedByIds,
geocodingWarnings,
ctx
);
ctx.Status("Brewery data loaded into target database.");
}
);
}
foreach (string warning in geocodingWarnings)
AnsiConsole.MarkupLine($"[yellow]![/] {warning.EscapeMarkup()}");
return 0;
}
@@ -165,20 +180,18 @@ static async Task<IReadOnlyList<Guid>> LoadUsersIntoDatabaseAsync(
return userAccountIds;
}
/// <summary>
/// Persists each <paramref name="breweries" /> record, resolving (and creating, if needed) its
/// Country/StateProvince/City chain via <paramref name="locationRepository" />. The pipeline
/// data has no street-level address or a specific user tied to each brewery, so a placeholder
/// address is used and <c>PostedById</c> is assigned round-robin from <paramref name="posterUserIds" />
/// to keep seeding deterministic across runs.
/// </summary>
static async Task LoadBreweriesIntoDatabaseAsync(
IBreweryRepository breweryRepository,
ILocationRepository locationRepository,
NominatimReverseGeocoder geocoder,
IReadOnlyList<BreweryRecord> breweries,
IReadOnlyList<Guid> posterUserIds
IReadOnlyList<Guid> posterUserIds,
List<string> geocodingWarnings,
StatusContext ctx
)
{
const string placeholderAddressLine1 = "Address unavailable";
if (posterUserIds.Count == 0)
throw new InvalidOperationException(
"Cannot load breweries without any registered users.");
@@ -187,6 +200,10 @@ static async Task LoadBreweriesIntoDatabaseAsync(
{
BreweryRecord breweryRecord = breweries[i];
ctx.Status(
$"Geocoding and loading brewery {i + 1}/{breweries.Count} into target database..."
);
Guid cityId = await locationRepository.GetOrCreateCityIdAsync(
new CityLocation(
breweryRecord.Address.City.CityName,
@@ -197,6 +214,18 @@ static async Task LoadBreweriesIntoDatabaseAsync(
)
);
ReverseGeocodeResult? geocoded = await geocoder.ReverseGeocodeAsync(
breweryRecord.Address.Longitude,
breweryRecord.Address.Latitude
);
if (geocoded is null)
geocodingWarnings.Add(
$"Could not reverse geocode '{breweryRecord.Brewery.NameEn}' "
+ $"({breweryRecord.Address.Latitude}, {breweryRecord.Address.Longitude}); "
+ "using a placeholder address."
);
await breweryRepository.CreateAsync(
new BreweryPost
{
@@ -204,12 +233,13 @@ static async Task LoadBreweriesIntoDatabaseAsync(
BreweryName = breweryRecord.Brewery.NameEn,
Description = breweryRecord.Brewery.DescriptionEn,
PostedById = posterUserIds[i % posterUserIds.Count],
// TODO: Populate Coordinates from breweryRecord.Address.Latitude/Longitude once it goes through NetTopologySuite (NTS).
Location = new BreweryPostLocation
{
BreweryPostLocationId = Guid.NewGuid(),
CityId = cityId,
AddressLine1 = "Address unavailable",
PostalCode = breweryRecord.Address.PostalCode,
AddressLine1 = geocoded?.AddressLine1 ?? placeholderAddressLine1,
PostalCode = geocoded?.PostalCode ?? string.Empty,
},
}
);
@@ -224,7 +254,8 @@ static Table BuildBreweryTable(IReadOnlyList<BreweryRecord> breweries)
.AddColumn("City")
.AddColumn("State/Province")
.AddColumn("Country")
.AddColumn("Postal Code");
.AddColumn("Longitude")
.AddColumn("Latitude");
foreach (BreweryRecord brewery in breweries)
{
@@ -234,7 +265,8 @@ static Table BuildBreweryTable(IReadOnlyList<BreweryRecord> breweries)
brewery.Address.City.CityName,
brewery.Address.City.StateProvince,
brewery.Address.City.Country,
brewery.Address.PostalCode
brewery.Address.Longitude.ToString("F6"),
brewery.Address.Latitude.ToString("F6")
);
}