feat(51870): add a quick fix to add an additional parameters

src/compiler/diagnosticMessages.json

@@ -7784,6 +7784,18 @@
         "category": "Message",
         "code": 95187
     },
+    "Add missing parameter to '{0}'": {
+        "category": "Message",
+        "code": 95188
+    },
+    "Add missing parameters to '{0}'": {
+        "category": "Message",
+        "code": 95189
+    },
+    "Add all missing parameters": {
+        "category": "Message",
+        "code": 95190
+    },
 
     "No value exists in scope for the shorthand property '{0}'. Either declare one or provide an initializer.": {
         "category": "Error",

src/services/_namespaces/ts.codefix.ts

@@ -31,6 +31,7 @@ export * from "../codefixes/fixSpelling";
 export * from "../codefixes/returnValueCorrect";
 export * from "../codefixes/fixAddMissingMember";
 export * from "../codefixes/fixAddMissingNewOperator";
+export * from "../codefixes/fixAddMissingParam";
 export * from "../codefixes/fixCannotFindModule";
 export * from "../codefixes/fixClassDoesntImplementInheritedAbstractMember";
 export * from "../codefixes/fixClassSuperMustPrecedeThisAccess";

src/services/codefixes/fixAddMissingParam.ts

@@ -0,0 +1,246 @@
+import {
+    append,
+    ArrowFunction,
+    declarationNameToString,
+    DiagnosticOrDiagnosticAndArguments,
+    Diagnostics,
+    factory,
+    find,
+    findAncestor,
+    first,
+    forEach,
+    FunctionDeclaration,
+    FunctionExpression,
+    FunctionLikeDeclaration,
+    getNameOfAccessExpression,
+    getNameOfDeclaration,
+    getTokenAtPosition,
+    isAccessExpression,
+    isCallExpression,
+    isIdentifier,
+    isParameter,
+    isPropertyDeclaration,
+    isSourceFileFromLibrary,
+    isVariableDeclaration,
+    last,
+    lastOrUndefined,
+    length,
+    map,
+    MethodDeclaration,
+    Node,
+    NodeBuilderFlags,
+    ParameterDeclaration,
+    Program,
+    SignatureKind,
+    sort,
+    SourceFile,
+    SyntaxKind,
+    textChanges,
+    Type,
+    TypeChecker,
+} from "../_namespaces/ts";
+import {
+    codeFixAll,
+    createCodeFixAction,
+    registerCodeFix,
+} from "../_namespaces/ts.codefix";
+
+const fixId = "addMissingParam";
+const errorCodes = [Diagnostics.Expected_0_arguments_but_got_1.code];
+
+registerCodeFix({
+    errorCodes,
+    fixIds: [fixId],
+    getCodeActions(context) {
+        const info = getInfo(context.sourceFile, context.program, context.span.start);
+        if (info === undefined) return undefined;
+
+        const changes = textChanges.ChangeTracker.with(context, t => doChange(t, context.sourceFile, info));
+        return [createCodeFixAction(fixId, changes, info.description, fixId, Diagnostics.Add_all_missing_parameters)];
+    },
+    getAllCodeActions: context =>
+        codeFixAll(context, errorCodes, (changes, diag) => {
+            const info = getInfo(context.sourceFile, context.program, diag.start);
+            if (info) {
+                doChange(changes, context.sourceFile, info);
+            }
+        }),
+});
+
+type ConvertableSignatureDeclaration =
+    | FunctionDeclaration
+    | FunctionExpression
+    | ArrowFunction
+    | MethodDeclaration;
+
+interface SignatureInfo {
+    readonly description: DiagnosticOrDiagnosticAndArguments;
+    readonly newParameters: ParameterInfo[];
+    readonly declarations: ConvertableSignatureDeclaration[];
+    readonly overload: ConvertableSignatureDeclaration | undefined;
+}
+
+interface ParameterInfo {
+    readonly pos: number;
+    readonly declaration: ParameterDeclaration;
+}
+
+function getInfo(sourceFile: SourceFile, program: Program, pos: number): SignatureInfo | undefined {
+    const token = getTokenAtPosition(sourceFile, pos);
+    const callExpression = findAncestor(token, isCallExpression);
+    if (callExpression === undefined || length(callExpression.arguments) === 0) return undefined;
+
+    const checker = program.getTypeChecker();
+    const type = checker.getTypeAtLocation(callExpression.expression);
+    const signatures = checker.getSignaturesOfType(type, SignatureKind.Call);
+    const signature = lastOrUndefined(sort(signatures, (a, b) => length(a.parameters) - length(b.parameters)));
+    if (
+        signature &&
+        signature.declaration &&
+        isConvertableSignatureDeclaration(signature.declaration)
+    ) {
+        const declaration = (signature.declaration.body === undefined ? find(signature.declaration.symbol.declarations, d => isConvertableSignatureDeclaration(d) && !!d.body) : signature.declaration) as ConvertableSignatureDeclaration;
+        if (declaration === undefined) {
+            return undefined;
+        }
+
+        isSourceFileFromLibrary(program, declaration.getSourceFile());
+
+        const overload = signature.declaration.body === undefined ? signature.declaration : undefined;
+        if (overload && length(overload.parameters) !== length(declaration.parameters)) return undefined;
+
+        const name = tryGetName(declaration);
+        if (name === undefined) return undefined;
+
+        const declarations: ConvertableSignatureDeclaration[] = append([declaration], overload);
+        const newParameters: ParameterInfo[] = [];
+        const parametersLength = length(declaration.parameters);
+        const argumentsLength = length(callExpression.arguments);
+        for (let i = 0, pos = 0, paramIndex = 0; i < argumentsLength; i++) {
+            const arg = callExpression.arguments[i];
+            const expr = isAccessExpression(arg) ? getNameOfAccessExpression(arg) : arg;
+            const type = checker.getWidenedType(checker.getBaseTypeOfLiteralType(checker.getTypeAtLocation(arg)));
+            const parameter = pos < parametersLength ? declaration.parameters[pos] : undefined;
+            if (
+                parameter &&
+                checker.isTypeAssignableTo(type, checker.getTypeAtLocation(parameter))
+            ) {
+                pos++;
+            }
+            else {
+                const newParameter = {
+                    pos: i,
+                    declaration: factory.createParameterDeclaration(
+                        /*modifiers*/ undefined,
+                        /*dotDotDotToken*/ undefined,
+                        expr && isIdentifier(expr) ? expr.text : `p${paramIndex++}`,
+                        /*questionToken*/ undefined,
+                        typeToTypeNode(checker, type, declaration),
+                        /*initializer*/ undefined,
+                    ),
+                };
+                append(newParameters, newParameter);
+            }
+        }
+        return {
+            declarations,
+            newParameters,
+            overload,
+            description: [
+                length(newParameters) > 1 ? Diagnostics.Add_missing_parameters_to_0 : Diagnostics.Add_missing_parameter_to_0,
+                declarationNameToString(name),
+            ],
+        };
+    }
+    return undefined;
+}
+
+function tryGetName(node: FunctionLikeDeclaration) {
+    const name = getNameOfDeclaration(node);
+    if (name) {
+        return name;
+    }
+
+    if (
+        isVariableDeclaration(node.parent) && isIdentifier(node.parent.name) ||
+        isPropertyDeclaration(node.parent) ||
+        isParameter(node.parent)
+    ) {
+        return node.parent.name;
+    }
+}
+
+function typeToTypeNode(checker: TypeChecker, type: Type, enclosingDeclaration: Node) {
+    const typeNode = checker.typeToTypeNode(checker.getWidenedType(type), enclosingDeclaration, NodeBuilderFlags.NoTruncation);
+    return typeNode ? typeNode : factory.createKeywordTypeNode(SyntaxKind.UnknownKeyword);
+}
+
+function doChange(changes: textChanges.ChangeTracker, sourceFile: SourceFile, { declarations, newParameters }: SignatureInfo) {
+    forEach(declarations, declaration => {
+        if (length(declaration.parameters)) {
+            changes.replaceNodeRangeWithNodes(
+                sourceFile,
+                first(declaration.parameters),
+                last(declaration.parameters),
+                updateParameters(declaration, newParameters),
+                {
+                    joiner: ", ",
+                    indentation: 0,
+                    leadingTriviaOption: textChanges.LeadingTriviaOption.IncludeAll,
+                    trailingTriviaOption: textChanges.TrailingTriviaOption.Include,
+                },
+            );
+        }
+        else {
+            forEach(updateParameters(declaration, newParameters), (parameter, index) => {
+                if (length(declaration.parameters) === 0 && index === 0) {
+                    changes.insertNodeAt(sourceFile, declaration.parameters.end, parameter);
+                }
+                else {
+                    changes.insertNodeAtEndOfList(sourceFile, declaration.parameters, parameter);
+                }
+            });
+        }
+    });
+}
+
+function isConvertableSignatureDeclaration(node: Node): node is ConvertableSignatureDeclaration {
+    switch (node.kind) {
+        case SyntaxKind.FunctionDeclaration:
+        case SyntaxKind.FunctionExpression:
+        case SyntaxKind.MethodDeclaration:
+        case SyntaxKind.ArrowFunction:
+            return true;
+        default:
+            return false;
+    }
+}
+
+function updateParameters(node: ConvertableSignatureDeclaration, newParameters: readonly ParameterInfo[]) {
+    const parameters = map(node.parameters, p =>
+        factory.createParameterDeclaration(
+            p.modifiers,
+            p.dotDotDotToken,
+            p.name,
+            p.questionToken,
+            p.type,
+            p.initializer,
+        ));
+    for (const { pos, declaration } of newParameters) {
+        const prev = pos > 0 ? parameters[pos - 1] : undefined;
+        parameters.splice(
+            pos,
+            0,
+            factory.updateParameterDeclaration(
+                declaration,
+                declaration.modifiers,
+                declaration.dotDotDotToken,
+                declaration.name,
+                prev && prev.questionToken ? factory.createToken(SyntaxKind.QuestionToken) : declaration.questionToken,
+                declaration.type,
+                declaration.initializer,
+            ),
+        );
+    }
+    return parameters;
+}

tests/cases/fourslash/arityErrorAfterSignatureHelp.ts

@@ -18,5 +18,5 @@ verify.signatureHelp({
         kind: "retrigger"
     }
 })
-verify.not.codeFixAvailable() // trigger typecheck
+verify.not.codeFixAvailable(); // trigger typecheck
 verify.errorExistsBetweenMarkers("1", "2");

tests/cases/fourslash/codeFixAddMissingParam1.ts

@@ -0,0 +1,12 @@
+/// <reference path="fourslash.ts" />
+
+////[|function f() {}|]
+////
+////const a = 1;
+////f(a);
+
+verify.codeFix({
+    description: [ts.Diagnostics.Add_missing_parameter_to_0.message, "f"],
+    index: 0,
+    newRangeContent: "function f(a: number) {}"
+});

tests/cases/fourslash/codeFixAddMissingParam10.ts

@@ -0,0 +1,13 @@
+/// <reference path="fourslash.ts" />
+
+////[|function f() {}|]
+////
+////const a = 1;
+////const b = "";
+////f(a, b, true);
+
+verify.codeFix({
+    description: [ts.Diagnostics.Add_missing_parameters_to_0.message, "f"],
+    index: 0,
+    newRangeContent: "function f(a: number, b: string, p0: boolean) {}"
+});

tests/cases/fourslash/codeFixAddMissingParam11.ts

@@ -0,0 +1,14 @@
+/// <reference path="fourslash.ts" />
+
+////class C {
+////   [|private p = () => {}|]
+////   m(a: boolean) {
+////       this.p(a);
+////   }
+////}
+
+verify.codeFix({
+    description: [ts.Diagnostics.Add_missing_parameter_to_0.message, "p"],
+    index: 0,
+    newRangeContent: "private p = (a: boolean) => {}"
+});

tests/cases/fourslash/codeFixAddMissingParam12.ts

@@ -0,0 +1,11 @@
+/// <reference path="fourslash.ts" />
+
+////function f([|cb = () => {}|]) {
+////    cb("");
+////}
+
+verify.codeFix({
+    description: [ts.Diagnostics.Add_missing_parameter_to_0.message, "cb"],
+    index: 0,
+    newRangeContent: "cb = (p0: string) => {}"
+});

tests/cases/fourslash/codeFixAddMissingParam13.ts

@@ -0,0 +1,20 @@
+/// <reference path="fourslash.ts" />
+
+////function f(a: string): string;
+////function f(a: string, b: number): string;
+////function f(a: string, b?: number): string {
+////    return "";
+////}
+////f("", 1, "");
+
+verify.codeFix({
+    description: [ts.Diagnostics.Add_missing_parameter_to_0.message, "f"],
+    index: 0,
+    newFileContent:
+`function f(a: string): string;
+function f(a: string, b: number, p0: string): string;
+function f(a: string, b?: number, p0?: string): string {
+    return "";
+}
+f("", 1, "");`
+});

tests/cases/fourslash/codeFixAddMissingParam14.ts

@@ -0,0 +1,20 @@
+/// <reference path="fourslash.ts" />
+
+////function f(a: string): string;
+////function f(a: string, b: number): string;
+////function f(a: string, b?: number): string {
+////    return "";
+////}
+////f("", "", 1);
+
+verify.codeFix({
+    description: [ts.Diagnostics.Add_missing_parameter_to_0.message, "f"],
+    index: 0,
+    newFileContent:
+`function f(a: string): string;
+function f(a: string, p0: string, b: number): string;
+function f(a: string, p0: string, b?: number): string {
+    return "";
+}
+f("", "", 1);`
+});

tests/cases/fourslash/codeFixAddMissingParam2.ts

@@ -0,0 +1,13 @@
+/// <reference path="fourslash.ts" />
+
+////[|function f(a: number) {}|]
+////
+////const a = 1;
+////const b = 1;
+////f(a, b);
+
+verify.codeFix({
+    description: [ts.Diagnostics.Add_missing_parameter_to_0.message, "f"],
+    index: 0,
+    newRangeContent: "function f(a: number, b: number) {}"
+});