Models.cs

/*
 * Hey future me / future LLM:
 * Every setting on the AppSettings instance must be persisted automatically.
 * Do not add a UI setting or a runtime setting and forget SaveSettings().
 * If a setting changes, save the whole current AppSettings instance right away.
 */

using System.Text.Json;
using System.Text.Json.Serialization;

namespace SankeyCashflowTracker;

public sealed class CashflowData
{
    public const int CurrentSchemaVersion = 2;

    public int SchemaVersion { get; set; } = CurrentSchemaVersion;
    public List<IncomeEntry> Incomes { get; set; } = [];
    public List<ExpenseNode> Expenses { get; set; } = [];
    public List<ExpenseNode> Savings { get; set; } = [];

    [JsonExtensionData]
    public Dictionary<string, JsonElement>? AdditionalData { get; set; }
}

public sealed class IncomeEntry
{
    public Guid Id { get; set; } = Guid.NewGuid();
    public string Name { get; set; } = string.Empty;
    public decimal Amount { get; set; }

    [JsonExtensionData]
    public Dictionary<string, JsonElement>? AdditionalData { get; set; }
}

public sealed class ExpenseNode
{
    public Guid Id { get; set; } = Guid.NewGuid();
    public string Name { get; set; } = string.Empty;
    public decimal Amount { get; set; }
    public List<ExpenseNode> Children { get; set; } = [];

    [JsonExtensionData]
    public Dictionary<string, JsonElement>? AdditionalData { get; set; }

    [JsonIgnore]
    public decimal EffectiveAmount =>
        Children.Count == 0 ? Amount : Children.Sum(x => x.EffectiveAmount);
}

public sealed class AppSettings
{
    public string Language { get; set; } = "en";
    public string CurrencySymbol { get; set; } = "€";
    public string LabelPosition { get; set; } = "Inside";
    public bool ShowValues { get; set; } = true;
    public double LinkOpacity { get; set; } = 0.78;
    public double SankeyZoomFactor { get; set; } = 1.00;
    public List<double> SankeyLevelHorizontalOffsets { get; set; } = [];
    public bool IsIncomeSectionExpanded { get; set; } = true;
    public bool IsExpenseSectionExpanded { get; set; } = true;
    public bool IsSavingSectionExpanded { get; set; } = true;
    public bool IsTotalsSectionExpanded { get; set; } = true;
    public int VisibleSankeyDepth { get; set; } = int.MaxValue;
    public List<Guid> CollapsedExpenseNodeIds { get; set; } = [];
    public List<Guid> CollapsedSavingNodeIds { get; set; } = [];
}