SwiftLint/Source/SwiftLintBuiltInRules/Rules/Idiomatic/LegacyCGGeometryFunctionsRule.swift

import SwiftLintCore

@SwiftSyntaxRule(explicitRewriter: true)
struct LegacyCGGeometryFunctionsRule: Rule {
    var configuration = SeverityConfiguration<Self>(.warning)

    static let description = RuleDescription(
        identifier: "legacy_cggeometry_functions",
        name: "Legacy CGGeometry Functions",
        description: "Struct extension properties and methods are preferred over legacy functions",
        kind: .idiomatic,
        nonTriggeringExamples: [
            Example("rect.width"),
            Example("rect.height"),
            Example("rect.minX"),
            Example("rect.midX"),
            Example("rect.maxX"),
            Example("rect.minY"),
            Example("rect.midY"),
            Example("rect.maxY"),
            Example("rect.isNull"),
            Example("rect.isEmpty"),
            Example("rect.isInfinite"),
            Example("rect.standardized"),
            Example("rect.integral"),
            Example("rect.insetBy(dx: 5.0, dy: -7.0)"),
            Example("rect.offsetBy(dx: 5.0, dy: -7.0)"),
            Example("rect1.union(rect2)"),
            Example("rect1.intersect(rect2)"),
            // "rect.divide(atDistance: 10.2, fromEdge: edge)", No correction available for divide
            Example("rect1.contains(rect2)"),
            Example("rect.contains(point)"),
            Example("rect1.intersects(rect2)"),
        ],
        triggeringExamples: [
            Example("↓CGRectGetWidth(rect)"),
            Example("↓CGRectGetHeight(rect)"),
            Example("↓CGRectGetMinX(rect)"),
            Example("↓CGRectGetMidX(rect)"),
            Example("↓CGRectGetMaxX(rect)"),
            Example("↓CGRectGetMinY(rect)"),
            Example("↓CGRectGetMidY(rect)"),
            Example("↓CGRectGetMaxY(rect)"),
            Example("↓CGRectIsNull(rect)"),
            Example("↓CGRectIsEmpty(rect)"),
            Example("↓CGRectIsInfinite(rect)"),
            Example("↓CGRectStandardize(rect)"),
            Example("↓CGRectIntegral(rect)"),
            Example("↓CGRectInset(rect, 10, 5)"),
            Example("↓CGRectOffset(rect, -2, 8.3)"),
            Example("↓CGRectUnion(rect1, rect2)"),
            Example("↓CGRectIntersection(rect1, rect2)"),
            Example("↓CGRectContainsRect(rect1, rect2)"),
            Example("↓CGRectContainsPoint(rect, point)"),
            Example("↓CGRectIntersectsRect(rect1, rect2)"),
        ],
        corrections: [
            Example("↓CGRectGetWidth( rect  )"): Example("rect.width"),
            Example("↓CGRectGetHeight(rect )"): Example("rect.height"),
            Example("↓CGRectGetMinX( rect)"): Example("rect.minX"),
            Example("↓CGRectGetMidX(  rect)"): Example("rect.midX"),
            Example("↓CGRectGetMaxX( rect)"): Example("rect.maxX"),
            Example("↓CGRectGetMinY(rect   )"): Example("rect.minY"),
            Example("↓CGRectGetMidY(rect )"): Example("rect.midY"),
            Example("↓CGRectGetMaxY( rect     )"): Example("rect.maxY"),
            Example("↓CGRectIsNull(  rect    )"): Example("rect.isNull"),
            Example("↓CGRectIsEmpty( rect )"): Example("rect.isEmpty"),
            Example("↓CGRectIsInfinite( rect )"): Example("rect.isInfinite"),
            Example("↓CGRectStandardize( rect)"): Example("rect.standardized"),
            Example("↓CGRectIntegral(rect )"): Example("rect.integral"),
            Example("↓CGRectInset(rect, 5.0, -7.0)"): Example("rect.insetBy(dx: 5.0, dy: -7.0)"),
            Example("↓CGRectOffset(rect, -2, 8.3)"): Example("rect.offsetBy(dx: -2, dy: 8.3)"),
            Example("↓CGRectUnion(rect1, rect2)"): Example("rect1.union(rect2)"),
            Example("↓CGRectIntersection( rect1 ,rect2)"): Example("rect1.intersection(rect2)"),
            Example("↓CGRectContainsRect( rect1,rect2     )"): Example("rect1.contains(rect2)"),
            Example("↓CGRectContainsPoint(rect  ,point)"): Example("rect.contains(point)"),
            Example("↓CGRectIntersectsRect(  rect1,rect2 )"): Example("rect1.intersects(rect2)"),
            Example("↓CGRectIntersectsRect(rect1, rect2 )\n↓CGRectGetWidth(rect  )"):
                Example("rect1.intersects(rect2)\nrect.width"),
        ]
    )

    private static let legacyFunctions: [String: LegacyFunctionRewriteStrategy] = [
        "CGRectGetWidth": .property(name: "width"),
        "CGRectGetHeight": .property(name: "height"),
        "CGRectGetMinX": .property(name: "minX"),
        "CGRectGetMidX": .property(name: "midX"),
        "CGRectGetMaxX": .property(name: "maxX"),
        "CGRectGetMinY": .property(name: "minY"),
        "CGRectGetMidY": .property(name: "midY"),
        "CGRectGetMaxY": .property(name: "maxY"),
        "CGRectIsNull": .property(name: "isNull"),
        "CGRectIsEmpty": .property(name: "isEmpty"),
        "CGRectIsInfinite": .property(name: "isInfinite"),
        "CGRectStandardize": .property(name: "standardized"),
        "CGRectIntegral": .property(name: "integral"),
        "CGRectInset": .function(name: "insetBy", argumentLabels: ["dx", "dy"]),
        "CGRectOffset": .function(name: "offsetBy", argumentLabels: ["dx", "dy"]),
        "CGRectUnion": .function(name: "union", argumentLabels: [""]),
        "CGRectContainsRect": .function(name: "contains", argumentLabels: [""]),
        "CGRectContainsPoint": .function(name: "contains", argumentLabels: [""]),
        "CGRectIntersectsRect": .function(name: "intersects", argumentLabels: [""]),
        "CGRectIntersection": .function(name: "intersection", argumentLabels: [""]),
    ]
}

private extension LegacyCGGeometryFunctionsRule {
    final class Visitor: LegacyFunctionVisitor<ConfigurationType> {
        init(configuration: ConfigurationType, file: SwiftLintFile) {
            super.init(configuration: configuration, file: file, legacyFunctions: legacyFunctions)
        }
    }

    final class Rewriter: LegacyFunctionRewriter<ConfigurationType> {
        init(configuration: ConfigurationType, file: SwiftLintFile) {
            super.init(configuration: configuration, file: file, legacyFunctions: legacyFunctions)
        }
    }
}