/// <summary>
/// Merges <paramref name="left"/> with <paramref name="right"/> and returns the result.
/// </summary>
/// <remarks>
/// The converters are merged by creating new converters that successively apply both. The entries of
/// <paramref name="left"/> are merged with the entries of <paramref name="right"/>.
/// <para> Two entries are merged by anding the conditions and taking the non-null form, stat and value,
/// i.e. two merged entries may not both have forms, stats or values.
/// </para>
/// <para> Which entries are merged depends on the number of entries in <paramref name="left"/> and
/// <paramref name="right"/>.
/// <list type="bullet">
/// <item>Both have more than one entry: An <see cref="ArgumentException"/> is thrown.</item>
/// <item>One has no entries: The result has no entries.</item>
/// <item>Otherwise: The single entry of one <see cref="IIntermediateModifier"/>
/// is merged with every entry of the other <see cref="IIntermediateModifier"/>, i.e. the result has as much
/// entries as the other <see cref="IIntermediateModifier"/>.</item>
/// </list>
/// </para>
/// </remarks>
public static IIntermediateModifier MergeWith(this IIntermediateModifier left, IIntermediateModifier right)
{
IStatBuilder ConvertStat(IStatBuilder s) =>
right.StatConverter(left.StatConverter(s));
IValueBuilder ConvertValue(IValueBuilder v) =>
right.ValueConverter(left.ValueConverter(v));
if (left.Entries.Count > 1 && right.Entries.Count > 1)
{
// This simple solution will fail once there are stat lines that parse into multiple stats
// and have a condition requiring splitting by main hand and off hand.
throw new ArgumentException("There may only be one IIntermediateModifier with multiple entries");
}
IEnumerable <IntermediateModifierEntry> entries;
if (left.Entries.IsEmpty())
{
entries = right.Entries;
}
else if (right.Entries.IsEmpty())
{
entries = left.Entries;
}
else
{
entries = left.Entries.SelectMany(l => right.Entries.Select(r => Merge(l, r)));
}
return(new SimpleIntermediateModifier(entries.ToList(), ConvertStat, ConvertValue));
}
private void Build(IntermediateModifierEntry entry)
{
if (entry.Form == null || entry.Stat == null || entry.Value == null)
{
return;
}
var(form, formValueConverter) = entry.Form.Build();
var buildParameters = new BuildParameters(_originalSource, _modifierSourceEntity, form);
var statBuilder = entry.Stat;
if (entry.Condition != null)
{
statBuilder = statBuilder.WithCondition(entry.Condition);
}
statBuilder = _modifier.StatConverter(statBuilder);
var statBuilderResults = statBuilder.Build(buildParameters);
foreach (var(stats, source, statValueConverter) in statBuilderResults)
{
var valueBuilder = formValueConverter(statValueConverter(_modifier.ValueConverter(entry.Value)));
var value = valueBuilder.Build(buildParameters);
_modifiers.Add(CreateModifier(stats, form, value, source));
}
}
/// <summary>
/// Merges <paramref name="left"/> with <paramref name="right"/> and returns the result.
/// </summary>
/// <remarks>
/// The converters are merged by creating new converters that successively apply both. The entries of
/// <paramref name="left"/> are merged with the entries of <paramref name="right"/>.
/// <para> Two entries are merged by anding the conditions and taking the non-null form, stat and value,
/// i.e. two merged entries may not both have forms, stats or values.
/// </para>
/// <para> Which entries are merged depends on the number of entries in <paramref name="left"/> and
/// <paramref name="right"/>.
/// <list type="bullet">
/// <item>Both have more than one entry: An <see cref="ArgumentException"/> is thrown.</item>
/// <item>One has no entries: The result has no entries.</item>
/// <item>Otherwise: The single entry of one <see cref="IIntermediateModifier"/>
/// is merged with every entry of the other <see cref="IIntermediateModifier"/>, i.e. the result has as much
/// entries as the other <see cref="IIntermediateModifier"/>.</item>
/// </list>
/// </para>
/// </remarks>
public static IIntermediateModifier MergeWith(this IIntermediateModifier left, IIntermediateModifier right)
{
IStatBuilder ConvertStat(IStatBuilder s) =>
right.StatConverter(left.StatConverter(s));
IValueBuilder ConvertValue(IValueBuilder v) =>
right.ValueConverter(left.ValueConverter(v));
if (left.Entries.Count > right.Entries.Count)
{
(left, right) = (right, left);
}
if (left.Entries.Count > 1)
{
throw new ArgumentException("There may only be one IIntermediateModifier with multiple entries");
}
if (left.Entries.IsEmpty())
{
return(new SimpleIntermediateModifier(right.Entries, ConvertStat, ConvertValue));
}
var leftEntry = left.Entries.Single();
IEnumerable <IntermediateModifierEntry> entries = right.Entries.Select(r => Merge(leftEntry, r));
return(new SimpleIntermediateModifier(entries.ToList(), ConvertStat, ConvertValue));
}
private static Modifier Build(
IIntermediateModifier modifier, IntermediateModifierEntry entry, ModifierSource originalSource)
{
if (entry.Form == null || entry.Stat == null || entry.Value == null)
{
return(null);
}
var statBuilder = modifier.StatConverter(entry.Stat);
if (entry.Condition != null)
{
statBuilder = statBuilder.WithCondition(entry.Condition);
}
var(stats, sourceConverter, statValueConverter) = statBuilder.Build();
var(form, formValueConverter) = entry.Form.Build();
var value =
formValueConverter(
statValueConverter(
modifier.ValueConverter(entry.Value))).Build();
return(new Modifier(stats, form, value, sourceConverter(originalSource)));
}
public IIntermediateModifier Resolve(IIntermediateModifier unresolved, ResolveContext context)
{
return(_builder
.WithValues(unresolved.Entries.Select(e => e.Value?.Resolve(context)))
.WithForms(unresolved.Entries.Select(e => e.Form?.Resolve(context)))
.WithStats(unresolved.Entries.Select(e => e.Stat?.Resolve(context)))
.WithConditions(unresolved.Entries.Select(e => e.Condition?.Resolve(context)))
.WithValueConverter(v => unresolved.ValueConverter(v)?.Resolve(context))
.WithStatConverter(s => unresolved.StatConverter(s)?.Resolve(context))
.Build());
}
public IIntermediateModifier Resolve(IIntermediateModifier unresolved, ResolveContext context)
{
var entries = unresolved.Entries;
return(_builder
.WithValues(Resolve(entries, e => e.Value, context))
.WithForms(Resolve(entries, e => e.Form, context))
.WithStats(Resolve(entries, e => e.Stat, context))
.WithConditions(Resolve(entries, e => e.Condition, context))
.WithValueConverter(v => unresolved.ValueConverter(v).Resolve(context))
.WithStatConverter(s => unresolved.StatConverter(s).Resolve(context))
.Build());
}