/// <summary>
/// Query rules.
///
/// If RuleSet is null, then returns null.
/// </summary>
/// <param name="filterCriteria"></param>
/// <returns></returns>
/// <exception cref="Exception">Wrapped error</exception>
public IPluralRulesEnumerable Query(PluralRuleInfo filterCriteria)
{
if (filterCriteria.RuleSet == null)
{
return(null);
}
ResultLine line = GetRules(filterCriteria.RuleSet);
if (line.Error != null)
{
throw new Exception(line.Error.Message, line.Error);
}
if (line.Rules == null)
{
return(null);
}
if (line.Rules is IPluralRulesQueryable queryable)
{
// Set RuleSet to null
return(queryable.Query(filterCriteria.ChangeRuleSet(null)));
}
return(null);
}
/// <summary>
/// </summary>
/// <param name="filterCriteria"></param>
/// <returns></returns>
public virtual IPluralRulesEnumerable Query(PluralRuleInfo filterCriteria)
{
if (filterCriteria.Equals(PluralRuleInfo.Empty))
{
return(this);
}
int c = 0;
foreach (var rule in this)
{
if (filterCriteria.FilterMatch(rule.Info))
{
c++;
}
}
IPluralRule[] result = new IPluralRule[c];
int i = 0;
foreach (var rule in this)
{
if (filterCriteria.FilterMatch(rule.Info))
{
result[i++] = rule;
}
}
return(new PluralRulesArray(result));
}
/// <summary>
/// Evaluate <paramref name="number"/> against all rules in the scope stating from the last added.
/// </summary>
/// <param name="subset">RuleSet, Culture and Category must have non-null value. "" is valid. Case must be null and optional must be -1.</param>
/// <param name="number">(optional) numeric and text representation of numberic value</param>
/// <returns>Matching cases, first ones are optional, the last one is always mandatory (and only mandatory). Or null if evaluate failed.</returns>
public IPluralRule[] Evaluate(PluralRuleInfo subset, IPluralNumber number)
{
for (int i = stack.Count - 1; i >= 0; i--)
{
if (stack[i] is IPluralRulesEvaluatable eval)
{
IPluralRule[] result = eval.Evaluate(subset, number);
if (result != null)
{
return(result);
}
}
}
// Could not evaluate.
return(null);
}
/// <summary>
/// Try to resolve ruleset and evaluate number.
/// </summary>
/// <param name="subset"></param>
/// <param name="number"></param>
/// <returns></returns>
/// <exception cref="Exception">On wrapped error</exception>
public IPluralRule[] Evaluate(PluralRuleInfo subset, IPluralNumber number)
{
if (subset.RuleSet != null)
{
ResultLine line = GetRules(subset.RuleSet);
if (line.Error != null)
{
throw new Exception(line.Error.Message, line.Error);
}
if (line.Rules is IPluralRulesEvaluatable eval)
{
// Set RuleSet to null
return(eval.Evaluate(subset.ChangeRuleSet(null), number));
}
}
return(null);
}
/// <summary>
/// If this info is a filter criteria, then tests whether <paramref name="info"/> matches the criteria.
/// If any of the local fields is null, then that value is not compared.
///
/// </summary>
/// <param name="info"></param>
/// <returns></returns>
public bool FilterMatch(PluralRuleInfo info)
{
if (RuleSet != null && RuleSet != info.RuleSet)
{
return(false);
}
if (Category != null && Category != info.Category)
{
return(false);
}
if (Culture != null && Culture != info.Culture)
{
return(false);
}
if (Case != null && Case != info.Case)
{
return(false);
}
if (Optional != -1 && Optional != info.Optional)
{
return(false);
}
return(true);
}
/// <summary>
/// Create rule that compares to zero value.
/// </summary>
/// <param name="info"></param>
public One(PluralRuleInfo info) : base(info)
{
}
/// <summary>
/// Create rule that compares to zero value.
/// </summary>
/// <param name="info"></param>
public Zero(PluralRuleInfo info) : base(info)
{
}
/// <summary>
/// Create rule that evaluates with <paramref name="ruleExpression"/>.
/// </summary>
/// <param name="info"></param>
/// <param name="infoExpression">info expression</param>
/// <param name="ruleExpression"></param>
/// <param name="samplesExpression"></param>
public Expression(PluralRuleInfo info, IPluralRuleInfosExpression infoExpression, IExpression ruleExpression, params ISamplesExpression[] samplesExpression) : base(info)
{
this.Infos = infoExpression;
this.Rule = ruleExpression;
this.Samples = samplesExpression ?? NO_SAMPLES;
}
/// <summary>
/// Create rule.
/// </summary>
/// <param name="info">info</param>
public PluralRule(PluralRuleInfo info)
{
this.Info = info;
}
/// <summary>
/// Create rule that always evaluates to true.
/// </summary>
/// <param name="info"></param>
/// <param name="infosExp"></param>
/// <param name="ruleExp"></param>
/// <param name="samplesExps"></param>
public TrueWithExpression(PluralRuleInfo info, IPluralRuleInfosExpression infosExp, IExpression ruleExp, params ISamplesExpression[] samplesExps) : base(info)
{
this.Infos = infosExp;
this.Rule = ruleExp;
this.Samples = samplesExps;
}
/// <summary>
/// Create rule that always evaluates to true.
/// </summary>
/// <param name="info"></param>
public True(PluralRuleInfo info) : base(info)
{
}
/// <summary>
/// Create rule
/// </summary>
/// <param name="info"></param>
public Empty(PluralRuleInfo info) : base(info)
{
}
/// <summary> /// Evaluate cases /// </summary> /// <param name="subset">filter</param> /// <param name="number"></param> /// <returns>matching cases. First ones are optional, last one is non-optional. Or null if none matched.</returns> public IPluralRule[] Evaluate(PluralRuleInfo subset, IPluralNumber number) => Query(subset) is IPluralRulesEvaluatable eval?eval.Evaluate(subset, number) : null;
/// <summary>
/// Filter rules by <paramref name="filterCriteria"/>.
/// </summary>
/// <param name="filterCriteria"></param>
/// <returns><see cref="PluralRulesCasesEvaluatable"/> or <see cref="PluralRulesArray"/>, or null if content is empty</returns>
public IPluralRulesEnumerable Query(PluralRuleInfo filterCriteria)
{
// Try get
IPluralRulesEnumerable result = null;
lock (m_lock) if (queries.TryGetValue(filterCriteria, out result))
{
return(result);
}
// Query
if (ruleSource is IPluralRulesQueryable queryable)
{
result = queryable.Query(filterCriteria);
// Wrap into PluralRulesEvaluatable
if (result != null && filterCriteria.Category != null && filterCriteria.Culture != null && filterCriteria.Case == null && filterCriteria.Optional == -1)
{
result = new PluralRulesCasesEvaluatable(result);
}
}
else if (ruleSource is IEnumerable <IPluralRule> enumr)
{
// Filter rules
StructList8 <IPluralRule> list = new StructList8 <IPluralRule>();
StructList8 <string> rulesets = new StructList8 <string>();
foreach (IPluralRule rule in enumr)
{
// Filter by criteria
if (!filterCriteria.FilterMatch(rule.Info))
{
continue;
}
// Gather a list of rulesets
if (rule.Info.RuleSet != null && !rulesets.Contains(rule.Info.RuleSet))
{
rulesets.Add(rule.Info.RuleSet);
}
// Add to list
list.Add(rule);
}
// No result
if (list.Count == 0)
{
result = null;
}
// Instantiate PluralRulesEvaluatable
else if (rulesets.Count <= 1 && filterCriteria.Category != null && filterCriteria.Culture != null && filterCriteria.Case == null && filterCriteria.Optional == -1)
{
result = new PluralRulesCasesEvaluatable(list.ToArray());
}
// Instantiate PluralRules.
else
{
result = new PluralRulesArray(list.ToArray());
}
}
// Could not read source
else
{
result = null;
}
// Write to cache, if is still new
lock (m_lock) if (!queries.ContainsKey(filterCriteria))
{
queries[filterCriteria] = result;
}
// Return result
return(result);
}
/// <summary> /// Query a collection of rules. /// </summary> /// <param name="rules"></param> /// <param name="filterCriteria">filter criteria</param> /// <returns>enumerable of rules, or null if could not run query with the <paramref name="filterCriteria"/></returns> public static IPluralRulesEnumerable Query(this IPluralRules rules, PluralRuleInfo filterCriteria) => rules is IPluralRulesQueryable queryable?queryable.Query(filterCriteria) : null;
/// <summary>
/// Add placeholder and cases that apply to that placeholder.
/// </summary>
/// <param name="placeholder"></param>
/// <param name="placeholderValue"></param>
/// <param name="pluralRules"></param>
/// <param name="culture"></param>
public void AddPlaceholder(IPlaceholder placeholder, IPluralNumber placeholderValue, IPluralRules pluralRules, string culture)
{
IExpression e = placeholder?.Expression;
if (e == null)
{
return;
}
// Query cases
PluralRuleInfo query = new PluralRuleInfo(null, placeholder.PluralCategory, culture, null, -1);
IPluralRule[] cases = pluralRules.Evaluate(query, placeholderValue);
if (cases == null || cases.Length == 0)
{
return;
}
int optionalCount = cases.Length == 1 ? 0 : cases.Length - 1;
int requiredCount = cases.Length > 0 ? 1 : 0;
// Scan arguments
StructList4 <int> argIndices = new StructList4 <int>();
GetArguments(e, ref argIndices);
// Add and unify cases
for (int ix = 0; ix < argIndices.Count; ix++)
{
int argIx = argIndices[ix];
// Find if argument already exists
int prevIx = -1;
for (int j = 0; j < arguments.Count; j++)
{
if (arguments[j].ArgumentIndex == argIx)
{
prevIx = j; break;
}
}
if (prevIx < 0)
{
// Add argument
Entry entry = new Entry {
Cases = cases, ArgumentIndex = argIx, OptionalCases = optionalCount, RequiredCases = requiredCount
};
arguments.Add(entry);
this.Count *= (1 + cases.Length);
this.count1 *= cases.Length;
}
else
{
// Previous entry
Entry entry = arguments[prevIx];
// Unify entries
StructList8 <IPluralRule> optionalCases = new StructList8 <IPluralRule>(IPluralRuleComparer.Default);
StructList8 <IPluralRule> requiredCases = new StructList8 <IPluralRule>(IPluralRuleComparer.Default);
foreach (var c in entry.Cases)
{
if (c.Info.Optional == 1)
{
optionalCases.AddIfNew(c);
}
else if (c.Info.Optional == 0)
{
requiredCases.AddIfNew(c);
}
}
foreach (var c in cases)
{
if (c.Info.Optional == 1)
{
optionalCases.AddIfNew(c);
}
else if (c.Info.Optional == 0)
{
requiredCases.AddIfNew(c);
}
}
StructList8 <IPluralRule> allCases = new StructList8 <IPluralRule>(IPluralRuleComparer.Default);
for (int i = 0; i < optionalCases.Count; i++)
{
allCases.Add(optionalCases[i]);
}
for (int i = 0; i < requiredCases.Count; i++)
{
allCases.Add(requiredCases[i]);
}
// Create new entry
Entry newEntry = new Entry {
Cases = allCases.ToArray(), ArgumentIndex = argIx, OptionalCases = optionalCases.Count, RequiredCases = requiredCases.Count
};
// Update
arguments[prevIx] = newEntry;
this.Count /= (1 + entry.Cases.Length);
this.Count *= (1 + newEntry.Cases.Length);
this.count1 /= entry.Cases.Length;
this.count1 *= newEntry.Cases.Length;
}
}
}
