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using System;
namespace Firebase.Database.Query
{
/// <summary>
/// Query extensions providing linq like syntax for firebase server methods.
/// </summary>
public static class QueryFactoryExtensions
{
/// <summary>
/// Adds an auth parameter to the query.
/// </summary>
/// <param name="node"> The child. </param>
/// <param name="tokenFactory"> The auth token. </param>
/// <returns> The <see cref="AuthQuery" />. </returns>
internal static AuthQuery WithAuth(this FirebaseQuery node, Func<string> tokenFactory)
{
return new AuthQuery(node, tokenFactory, node.Client);
}
/// <summary>
/// References a sub child of the existing node.
/// </summary>
/// <param name="node"> The child. </param>
/// <param name="pathFactory"> The path of sub child. </param>
/// <returns> The <see cref="ChildQuery" />. </returns>
public static ChildQuery Child(this ChildQuery node, Func<string> pathFactory)
{
return new ChildQuery(node, pathFactory, node.Client);
}
/// <summary>
/// Order data by given <see cref="propertyNameFactory" />. Note that this is used mainly for following filtering
/// queries and due to firebase implementation
/// the data may actually not be ordered.
/// </summary>
/// <param name="child"> The child. </param>
/// <param name="propertyNameFactory"> The property name. </param>
/// <returns> The <see cref="OrderQuery" />. </returns>
public static OrderQuery OrderBy(this ChildQuery child, Func<string> propertyNameFactory)
{
return new OrderQuery(child, propertyNameFactory, child.Client);
}
/// <summary>
/// Order data by $key. Note that this is used mainly for following filtering queries and due to firebase
/// implementation
/// the data may actually not be ordered.
/// </summary>
/// <param name="child"> The child. </param>
/// <returns> The <see cref="OrderQuery" />. </returns>
public static OrderQuery OrderByKey(this ChildQuery child)
{
return child.OrderBy("$key");
}
/// <summary>
/// Order data by $value. Note that this is used mainly for following filtering queries and due to firebase
/// implementation
/// the data may actually not be ordered.
/// </summary>
/// <param name="child"> The child. </param>
/// <returns> The <see cref="OrderQuery" />. </returns>
public static OrderQuery OrderByValue(this ChildQuery child)
{
return child.OrderBy("$value");
}
/// <summary>
/// Order data by $priority. Note that this is used mainly for following filtering queries and due to firebase
/// implementation
/// the data may actually not be ordered.
/// </summary>
/// <param name="child"> The child. </param>
/// <returns> The <see cref="OrderQuery" />. </returns>
public static OrderQuery OrderByPriority(this ChildQuery child)
{
return child.OrderBy("$priority");
}
/// <summary>
/// Instructs firebase to send data greater or equal to the <see cref="valueFactory" />. This must be preceded by an
/// OrderBy query.
/// </summary>
/// <param name="child"> Current node. </param>
/// <param name="valueFactory"> Value to start at. </param>
/// <returns> The <see cref="FilterQuery" />. </returns>
public static FilterQuery StartAt(this ParameterQuery child, Func<string> valueFactory)
{
return new FilterQuery(child, () => "startAt", valueFactory, child.Client);
}
/// <summary>
/// Instructs firebase to send data lower or equal to the <see cref="valueFactory" />. This must be preceded by an
/// OrderBy query.
/// </summary>
/// <param name="child"> Current node. </param>
/// <param name="valueFactory"> Value to start at. </param>
/// <returns> The <see cref="FilterQuery" />. </returns>
public static FilterQuery EndAt(this ParameterQuery child, Func<string> valueFactory)
{
return new FilterQuery(child, () => "endAt", valueFactory, child.Client);
}
/// <summary>
/// Instructs firebase to send data equal to the <see cref="valueFactory" />. This must be preceded by an OrderBy
/// query.
/// </summary>
/// <param name="child"> Current node. </param>
/// <param name="valueFactory"> Value to start at. </param>
/// <returns> The <see cref="FilterQuery" />. </returns>
public static FilterQuery EqualTo(this ParameterQuery child, Func<string> valueFactory)
{
return new FilterQuery(child, () => "equalTo", valueFactory, child.Client);
}
/// <summary>
/// Instructs firebase to send data greater or equal to the <see cref="valueFactory" />. This must be preceded by an
/// OrderBy query.
/// </summary>
/// <param name="child"> Current node. </param>
/// <param name="valueFactory"> Value to start at. </param>
/// <returns> The <see cref="FilterQuery" />. </returns>
public static FilterQuery StartAt(this ParameterQuery child, Func<double> valueFactory)
{
return new FilterQuery(child, () => "startAt", valueFactory, child.Client);
}
/// <summary>
/// Instructs firebase to send data lower or equal to the <see cref="valueFactory" />. This must be preceded by an
/// OrderBy query.
/// </summary>
/// <param name="child"> Current node. </param>
/// <param name="valueFactory"> Value to start at. </param>
/// <returns> The <see cref="FilterQuery" />. </returns>
public static FilterQuery EndAt(this ParameterQuery child, Func<double> valueFactory)
{
return new FilterQuery(child, () => "endAt", valueFactory, child.Client);
}
/// <summary>
/// Instructs firebase to send data equal to the <see cref="valueFactory" />. This must be preceded by an OrderBy
/// query.
/// </summary>
/// <param name="child"> Current node. </param>
/// <param name="valueFactory"> Value to start at. </param>
/// <returns> The <see cref="FilterQuery" />. </returns>
public static FilterQuery EqualTo(this ParameterQuery child, Func<double> valueFactory)
{
return new FilterQuery(child, () => "equalTo", valueFactory, child.Client);
}
/// <summary>
/// Instructs firebase to send data equal to the <see cref="valueFactory" />. This must be preceded by an OrderBy
/// query.
/// </summary>
/// <param name="child"> Current node. </param>
/// <param name="valueFactory"> Value to start at. </param>
/// <returns> The <see cref="FilterQuery" />. </returns>
public static FilterQuery EqualTo(this ParameterQuery child, Func<bool> valueFactory)
{
return new FilterQuery(child, () => "equalTo", valueFactory, child.Client);
}
/// <summary>
/// Limits the result to first <see cref="countFactory" /> items.
/// </summary>
/// <param name="child"> Current node. </param>
/// <param name="countFactory"> Number of elements. </param>
/// <returns> The <see cref="FilterQuery" />. </returns>
public static FilterQuery LimitToFirst(this ParameterQuery child, Func<int> countFactory)
{
return new FilterQuery(child, () => "limitToFirst", () => countFactory(), child.Client);
}
/// <summary>
/// Limits the result to last <see cref="countFactory" /> items.
/// </summary>
/// <param name="child"> Current node. </param>
/// <param name="countFactory"> Number of elements. </param>
/// <returns> The <see cref="FilterQuery" />. </returns>
public static FilterQuery LimitToLast(this ParameterQuery child, Func<int> countFactory)
{
return new FilterQuery(child, () => "limitToLast", () => countFactory(), child.Client);
}
}
}
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