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import {ABAPRule} from "./_abap_rule";
import * as Structures from "../abap/3_structures/structures";
import {BasicRuleConfig} from "./_basic_rule_config";
import {ClassName, MethodCall, InterfaceName, TypeName} from "../abap/2_statements/expressions";
import {Position} from "../position";
import {EditHelper} from "../edit_helper";
import {RuleTag} from "./_irule";
import {ABAPFile} from "../abap/abap_file";
export class PrefixIsCurrentClassConf extends BasicRuleConfig {
/**
* Checks usages of self references with 'me' when calling instance methods
*/
public omitMeInstanceCalls: boolean = true;
}
export class PrefixIsCurrentClass extends ABAPRule {
private conf = new PrefixIsCurrentClassConf();
public getMetadata() {
return {
key: "prefix_is_current_class",
title: "Prefix is current class",
shortDescription: `Reports errors if the current class or interface references itself with "current_class=>"`,
// eslint-disable-next-line max-len
extendedInformation: `https://github.com/SAP/styleguides/blob/main/clean-abap/CleanABAP.md#omit-the-self-reference-me-when-calling-an-instance-method`,
tags: [RuleTag.Styleguide, RuleTag.Quickfix, RuleTag.SingleFile],
};
}
public getConfig() {
return this.conf;
}
public setConfig(conf: PrefixIsCurrentClassConf) {
this.conf = conf;
}
public runParsed(file: ABAPFile) {
return this.checkClasses(file).concat(this.checkInterfaces(file));
}
private checkInterfaces(file: ABAPFile): Issue[] {
const struc = file.getStructure();
if (struc === undefined) {
return [];
}
const issues: Issue[] = [];
for (const s of struc.findDirectStructures(Structures.Interface)) {
const name = s.findFirstExpression(InterfaceName)?.getFirstToken().getStr().toUpperCase();
if (name === undefined) {
continue;
}
const staticAccess = name + "=>";
for (const e of s.findAllExpressions(TypeName)) {
const concat = e.concatTokens().toUpperCase();
if (concat.startsWith(staticAccess)) {
const stat = e.findDirectTokenByText("=>");
if (stat === undefined) {
continue;
}
const start = new Position(stat.getRow(), stat.getCol() - name.length);
const end = new Position(stat.getRow(), stat.getCol() + 2);
const fix = EditHelper.deleteRange(file, start, end);
issues.push(Issue.atToken(
file,
e.getFirstToken(),
"Reference to current interface can be omitted",
this.getMetadata().key,
this.conf.severity,
fix));
}
}
}
return issues;
}
private checkClasses(file: ABAPFile): Issue[] {
const struc = file.getStructure();
if (struc === undefined) {
return [];
}
const issues: Issue[] = [];
const classStructures = struc.findDirectStructures(Structures.ClassImplementation);
classStructures.push(...struc.findDirectStructures(Structures.ClassDefinition));
const meAccess = "ME->";
for (const c of classStructures) {
const className = c.findFirstExpression(ClassName)!.getFirstToken().getStr().toUpperCase();
const staticAccess = className + "=>";
for (const s of c.findAllStatementNodes()) {
const concat = s.concatTokensWithoutStringsAndComments().toUpperCase();
if (concat.includes(staticAccess)) {
const tokenPos = s.findTokenSequencePosition(className, "=>");
if (tokenPos) {
const end = new Position(tokenPos.getRow(), tokenPos.getCol() + className.length + 2);
const fix = EditHelper.deleteRange(file, tokenPos, end);
issues.push(Issue.atRange(
file,
tokenPos, end,
"Reference to current class can be omitted: \"" + staticAccess + "\"",
this.getMetadata().key,
this.conf.severity,
fix));
}
} else if (this.conf.omitMeInstanceCalls === true
&& concat.includes(meAccess)
&& s.findFirstExpression(MethodCall)) {
const tokenPos = s.findTokenSequencePosition("me", "->");
if (tokenPos) {
const end = new Position(tokenPos.getRow(), tokenPos.getCol() + 4);
const fix = EditHelper.deleteRange(file, tokenPos, end);
issues.push(Issue.atRange(
file,
tokenPos, end,
"Omit 'me->' in instance calls",
this.getMetadata().key, this.conf.severity, fix));
}
}
}
}
return issues;
}
} |