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fix(utils): add missing types for onCodePath* in RuleListener #6679

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fix(utils): add missing types for onCodePath* in RuleListener #6679

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49 changes: 48 additions & 1 deletion packages/utils/src/ts-eslint/Rule.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@ interface RuleMetaDataDocs {
*/
extendsBaseRule?: boolean | string;
}

interface RuleMetaData<TMessageIds extends string> {
/**
* True if the rule is deprecated, false otherwise
Expand Down Expand Up @@ -262,12 +263,39 @@ interface RuleContext<
report(descriptor: ReportDescriptor<TMessageIds>): void;
}

interface CodePath {
id: string;
initialSegment: CodePathSegment;
finalSegments: CodePathSegment[];
returnedSegments: CodePathSegment[];
thrownSegments: CodePathSegment[];
currentSegments: CodePathSegment[];
upper: CodePath | null;
childCodePaths: CodePath[];
}

interface CodePathSegment {
id: string;
nextSegments: CodePathSegment[];
prevSegments: CodePathSegment[];
reachable: boolean;
}

type CodePathFunction =
| ((codePath: CodePath, node: TSESTree.Node) => void)
| ((segment: CodePathSegment, node: TSESTree.Node) => void)
| ((
fromSegment: CodePathSegment,
toSegment: CodePathSegment,
node: TSESTree.Node,
) => void);

// This isn't the correct signature, but it makes it easier to do custom unions within reusable listeners
// never will break someone's code unless they specifically type the function argument
type RuleFunction<T extends TSESTree.BaseNode = never> = (node: T) => void;

interface RuleListener {
[nodeSelector: string]: RuleFunction | undefined;
[nodeSelector: string]: RuleFunction | CodePathFunction | undefined;
ArrayExpression?: RuleFunction<TSESTree.ArrayExpression>;
ArrayPattern?: RuleFunction<TSESTree.ArrayPattern>;
ArrowFunctionExpression?: RuleFunction<TSESTree.ArrowFunctionExpression>;
Expand Down Expand Up @@ -425,6 +453,22 @@ interface RuleListener {
WhileStatement?: RuleFunction<TSESTree.WhileStatement>;
WithStatement?: RuleFunction<TSESTree.WithStatement>;
YieldExpression?: RuleFunction<TSESTree.YieldExpression>;

onCodePathStart?: (codePath: CodePath, node: TSESTree.Node) => void;
onCodePathEnd?: (codePath: CodePath, node: TSESTree.Node) => void;
onCodePathSegmentStart?: (
segment: CodePathSegment,
node: TSESTree.Node,
) => void;
onCodePathSegmentEnd?: (
segment: CodePathSegment,
node: TSESTree.Node,
) => void;
onCodePathSegmentLoop?: (
fromSegment: CodePathSegment,
toSegment: CodePathSegment,
node: TSESTree.Node,
) => void;
}

interface RuleModule<
Expand Down Expand Up @@ -458,6 +502,9 @@ type RuleCreateFunction<
> = (context: Readonly<RuleContext<TMessageIds, TOptions>>) => TRuleListener;

export {
CodePath,
CodePathSegment,
CodePathFunction,
ReportDescriptor,
ReportFixFunction,
ReportSuggestionArray,
Expand Down
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