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import {ABAPRule} from "./_abap_rule";
import * as Statements from "../abap/2_statements/statements";
import * as Expressions from "../abap/2_statements/expressions";
import {BasicRuleConfig} from "./_basic_rule_config";
import {Class} from "../objects";
import {InfoClassDefinition} from "../abap/4_file_information/_abap_file_information";
import {IRuleMetadata, RuleTag} from "./_irule";
import {ABAPObject} from "../objects/_abap_object";
import {DDIC} from "../ddic";
import {EditHelper} from "../edit_helper";
import {StatementNode} from "../abap/nodes/statement_node";
import {ABAPFile} from "../abap/abap_file";
export class FunctionalWritingConf extends BasicRuleConfig {
/** Ignore functional writing in exception classes, local + global */
public ignoreExceptions: boolean = true;
}
export class FunctionalWriting extends ABAPRule {
private conf = new FunctionalWritingConf();
public getMetadata(): IRuleMetadata {
return {
key: "functional_writing",
title: "Use functional writing",
shortDescription: `Detects usage of call method when functional style calls can be used.`,
extendedInformation: `https://github.com/SAP/styleguides/blob/main/clean-abap/CleanABAP.md#prefer-functional-to-procedural-calls
https://docs.abapopenchecks.org/checks/07/`,
tags: [RuleTag.Styleguide, RuleTag.Quickfix, RuleTag.SingleFile],
badExample: `CALL METHOD zcl_class=>method( ).
CALL METHOD cl_abap_typedescr=>describe_by_name
EXPORTING
p_name = 'NAME'
RECEIVING
p_descr_ref = lr_typedescr
EXCEPTIONS
type_not_found = 1
OTHERS = 2.`,
goodExample: `zcl_class=>method( ).
cl_abap_typedescr=>describe_by_name(
EXPORTING
p_name = 'NAME'
RECEIVING
p_descr_ref = lr_typedescr
EXCEPTIONS
type_not_found = 1
OTHERS = 2 ).`,
};
}
private getMessage(): string {
return "Use functional writing style for method calls";
}
public getConfig() {
return this.conf;
}
public setConfig(conf: FunctionalWritingConf) {
this.conf = conf;
}
public runParsed(file: ABAPFile, obj: ABAPObject): readonly Issue[] {
const issues: Issue[] = [];
let exception = false;
if (obj.getType() === "INTF") {
return [];
}
let definition: InfoClassDefinition | undefined = undefined;
if (obj instanceof Class) {
definition = obj.getClassDefinition();
}
const ddic = new DDIC(this.reg);
for (const statNode of file.getStatements()) {
if (statNode.get() instanceof Statements.ClassImplementation
&& definition
&& ddic.isException(definition, obj)
&& this.conf.ignoreExceptions) {
exception = true;
} else if (statNode.get() instanceof Statements.EndClass) {
exception = false;
} else if (exception === false && statNode.get() instanceof Statements.Call) {
if (statNode.getFirstChild()?.get() instanceof Expressions.MethodCallChain) {
continue;
}
const dynamic = statNode.findDirectExpression(Expressions.MethodSource)?.findDirectExpression(Expressions.Dynamic);
if (dynamic !== undefined) {
continue;
}
issues.push(this.createIssueForStatementNode(file, statNode));
}
}
return issues;
}
private createIssueForStatementNode(file: ABAPFile, statNode: StatementNode): Issue {
const fixString = this.buildFixString(statNode);
const fix = EditHelper.replaceRange(file, statNode.getStart(), statNode.getEnd(), fixString);
return Issue.atStatement(file, statNode, this.getMessage(), this.getMetadata().key, this.conf.severity, fix);
}
private buildFixString(statNode: StatementNode) {
// Note: line breaks from source are lost
const methodSource = statNode.findDirectExpression(Expressions.MethodSource);
let methodSourceStr = methodSource?.concatTokens();
const methodBody = statNode.findDirectExpression(Expressions.MethodCallBody);
let methodBodyStr = "";
if (methodBody) {
const methodCallParam = methodBody.findDirectExpression(Expressions.MethodCallParam);
if (methodCallParam && methodCallParam.getFirstToken().getStr() === "(") {
// has parameters and parantheses
methodBodyStr = `${methodBody.concatTokens()}.`;
} else {
// has parameters, but parentheses are missing
methodSourceStr = `${methodSourceStr}( `;
methodBodyStr = `${methodBody.concatTokens()} ).`;
}
}
else {
// no body means no parentheses and no parameters
methodBodyStr = "( ).";
}
return methodSourceStr + methodBodyStr;
}
} |