jsoncompat 0.3.1

JSON Schema Compatibility Checker
Documentation 
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//! Scalar subset helpers for numbers, integers, strings, booleans, and nulls.

use crate::SchemaNode;
use json_schema_ast::{
    CountRange, IntegerBounds, IntegerMultipleOf, NumberBounds, NumberMultipleOf, SchemaNodeKind,
    json_values_equal,
};
use serde_json::Value;

pub(super) fn scalar_constraints_subsumed(
    sub_length: CountRange<u64>,
    sub_enum: Option<&[Value]>,
    sup_length: CountRange<u64>,
    sup_enum: Option<&[Value]>,
) -> bool {
    sup_length.contains_range(sub_length) && check_enum_inclusion(sub_enum, sup_enum)
}

pub(super) fn number_constraints_subsumed(
    sub_bounds: NumberBounds,
    sub_multiple_of: Option<&NumberMultipleOf>,
    sub_enum: Option<&[Value]>,
    sup_bounds: NumberBounds,
    sup_multiple_of: Option<&NumberMultipleOf>,
    sup_enum: Option<&[Value]>,
) -> bool {
    sup_bounds.contains_bounds(sub_bounds)
        && check_multiple_of_inclusion(sub_multiple_of, sup_multiple_of)
        && check_enum_inclusion(sub_enum, sup_enum)
}

pub(super) fn integer_constraints_subsumed(
    sub_bounds: IntegerBounds,
    sub_multiple_of: Option<&IntegerMultipleOf>,
    sub_enum: Option<&[Value]>,
    sup_bounds: IntegerBounds,
    sup_multiple_of: Option<&IntegerMultipleOf>,
    sup_enum: Option<&[Value]>,
) -> bool {
    sup_bounds.contains_bounds(sub_bounds)
        && check_integer_multiple_of_inclusion(sub_multiple_of, sup_multiple_of)
        && check_enum_inclusion(sub_enum, sup_enum)
}

pub(super) fn integer_constraints_subsumed_by_number(sub: &SchemaNode, sup: &SchemaNode) -> bool {
    let (
        SchemaNodeKind::Integer {
            bounds: sub_bounds,
            multiple_of: sub_multiple_of,
            enumeration: sub_enum,
        },
        SchemaNodeKind::Number {
            bounds: sup_bounds,
            multiple_of: sup_multiple_of,
            enumeration: sup_enum,
        },
    ) = (sub.kind(), sup.kind())
    else {
        return false;
    };

    sup_bounds.contains_bounds(sub_bounds.as_number_bounds())
        && check_integer_multiple_of_inclusion_by_number(
            sub_multiple_of.as_ref(),
            sup_multiple_of.as_ref(),
        )
        && check_enum_inclusion(sub_enum.as_deref(), sup_enum.as_deref())
}

pub(super) fn check_enum_inclusion(sub_enum: Option<&[Value]>, sup_enum: Option<&[Value]>) -> bool {
    match (sub_enum, sup_enum) {
        (_, None) => true,
        (Some(sub_enum), Some(sup_enum)) => sub_enum.iter().all(|value| {
            sup_enum
                .iter()
                .any(|expected| json_values_equal(expected, value))
        }),
        (None, Some(_)) => false,
    }
}

fn check_multiple_of_inclusion(
    sub_multiple_of: Option<&NumberMultipleOf>,
    sup_multiple_of: Option<&NumberMultipleOf>,
) -> bool {
    let Some(sup_multiple_of) = sup_multiple_of else {
        return true;
    };
    let Some(sub_multiple_of) = sub_multiple_of else {
        return false;
    };

    sub_multiple_of
        .integer_divisor_is_multiple_of(*sup_multiple_of)
        .unwrap_or(false)
}

fn check_integer_multiple_of_inclusion(
    sub_multiple_of: Option<&IntegerMultipleOf>,
    sup_multiple_of: Option<&IntegerMultipleOf>,
) -> bool {
    let Some(sup_multiple_of) = sup_multiple_of else {
        return true;
    };
    let Some(sub_multiple_of) = sub_multiple_of else {
        return false;
    };

    sub_multiple_of
        .integer_divisor_is_multiple_of(*sup_multiple_of)
        .unwrap_or(false)
}

fn check_integer_multiple_of_inclusion_by_number(
    sub_multiple_of: Option<&IntegerMultipleOf>,
    sup_multiple_of: Option<&NumberMultipleOf>,
) -> bool {
    let Some(sup_multiple_of) = sup_multiple_of else {
        return true;
    };
    let Some(sub_multiple_of) = sub_multiple_of else {
        return false;
    };

    sub_multiple_of
        .integer_divisor_is_multiple_of_number(*sup_multiple_of)
        .unwrap_or(false)
}