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import {ABAPRule} from "./_abap_rule";
import * as Expressions from "../abap/2_statements/expressions";
import * as Statements from "../abap/2_statements/statements";
import {BasicRuleConfig} from "./_basic_rule_config";
import {IRuleMetadata, RuleTag} from "./_irule";
import {EditHelper} from "../edit_helper";
import {ABAPFile} from "../abap/abap_file";
import {ExpressionNode} from "../abap/nodes";
const ABAP_BOOL = "ABAP_BOOL";
const ABAP_TRUE = "abap_true";
const ABAP_FALSE = "abap_false";
const VALID_VALUES = new Set(["ABAP_TRUE", "ABAP_FALSE", "ABAP_UNDEFINED"]);
export class PreferAbapBoolValuesConf extends BasicRuleConfig {
}
export class PreferAbapBoolValues extends ABAPRule {
private conf = new PreferAbapBoolValuesConf();
public getMetadata(): IRuleMetadata {
return {
key: "prefer_abap_bool_values",
title: "Prefer abap_true and abap_false",
shortDescription: `Use abap_true and abap_false instead of 'X' and ' ' for abap_bool variables`,
// eslint-disable-next-line max-len
extendedInformation: `https://github.com/SAP/styleguides/blob/main/clean-abap/CleanABAP.md#use-abap_true-abap_false-and-abap_undefined-for-abap_bool-variables`,
tags: [RuleTag.Styleguide, RuleTag.SingleFile, RuleTag.Quickfix],
badExample: `DATA lv_flag TYPE abap_bool.\nlv_flag = 'X'.`,
goodExample: `DATA lv_flag TYPE abap_bool.\nlv_flag = abap_true.`,
};
}
public getConfig() {
return this.conf;
}
public setConfig(conf: PreferAbapBoolValuesConf) {
this.conf = conf;
}
public runParsed(file: ABAPFile): Issue[] {
const issues: Issue[] = [];
const structure = file.getStructure();
if (structure === undefined) {
return [];
}
const boolVars = this.collectBoolVars(file);
// Check Move statements: target = source
for (const stat of structure.findAllStatements(Statements.Move)) {
const target = stat.findFirstExpression(Expressions.Target);
const source = stat.findFirstExpression(Expressions.Source);
if (target === undefined || source === undefined) {
continue;
}
const targetName = target.concatTokens().toUpperCase();
if (!boolVars.has(targetName)) {
continue;
}
this.checkSourceNode(source, file, issues);
}
// Check comparisons: IF/ELSEIF conditions
const compareStatements = [
...structure.findAllStatements(Statements.If),
...structure.findAllStatements(Statements.ElseIf),
];
for (const stat of compareStatements) {
const cond = stat.findFirstExpression(Expressions.Cond);
if (cond === undefined) {
continue;
}
for (const compare of cond.findAllExpressions(Expressions.Compare)) {
this.checkCompareBoolLiteral(compare, boolVars, file, issues);
}
}
return issues;
}
private collectBoolVars(file: ABAPFile): Set<string> {
const boolVars = new Set<string>();
const structure = file.getStructure();
if (structure === undefined) {
return boolVars;
}
const statements = [
...structure.findAllStatements(Statements.Data),
...structure.findAllStatements(Statements.ClassData),
...structure.findAllStatements(Statements.FieldSymbol),
];
for (const stat of statements) {
const typeNameExpr = stat.findFirstExpression(Expressions.TypeName);
if (typeNameExpr === undefined) {
continue;
}
if (typeNameExpr.concatTokens().toUpperCase() !== ABAP_BOOL) {
continue;
}
const nameExpr = stat.findFirstExpression(Expressions.DefinitionName)
?? stat.findFirstExpression(Expressions.FieldSymbol);
if (nameExpr === undefined) {
continue;
}
boolVars.add(nameExpr.concatTokens().toUpperCase());
}
return boolVars;
}
private checkSourceNode(source: ExpressionNode, file: ABAPFile, issues: Issue[]): void {
const firstToken = source.getFirstToken().getStr().toUpperCase();
if (firstToken === "COND") {
const condBody = source.findDirectExpression(Expressions.CondBody);
if (condBody) {
this.checkCondBodyBranches(condBody, file, issues);
}
return;
}
if (firstToken === "SWITCH") {
const switchBody = source.findDirectExpression(Expressions.SwitchBody);
if (switchBody) {
this.checkSwitchBodyBranches(switchBody, file, issues);
}
return;
}
// Plain literal assignment
const issue = this.checkLiteralSource(source, file);
if (issue) {
issues.push(issue);
}
}
private checkLiteralSource(source: ExpressionNode, file: ABAPFile): Issue | undefined {
const constantStr = source.findFirstExpression(Expressions.ConstantString);
if (constantStr === undefined) {
return undefined;
}
const token = constantStr.getFirstToken();
const val = token.getStr();
if (val === "'X'") {
const fix = EditHelper.replaceToken(file, token, ABAP_TRUE);
return Issue.atToken(file, token, `Use ${ABAP_TRUE} instead of 'X'`, this.getMetadata().key, this.conf.severity, fix);
}
if (val === "' '") {
const fix = EditHelper.replaceToken(file, token, ABAP_FALSE);
return Issue.atToken(file, token, `Use ${ABAP_FALSE} instead of ' '`, this.getMetadata().key, this.conf.severity, fix);
}
return undefined;
}
private checkCondBodyBranches(condBody: ExpressionNode, file: ABAPFile, issues: Issue[]): void {
// CondBody: WHEN <cond> THEN <source> [WHEN <cond> THEN <source>]* [ELSE <source>]
// Walk children; Source nodes after THEN/ELSE are the result values
let afterThenOrElse = false;
for (const child of condBody.getChildren()) {
const tokenStr = child.getFirstToken().getStr().toUpperCase();
if (tokenStr === "THEN" || tokenStr === "ELSE") {
afterThenOrElse = true;
continue;
}
if (tokenStr === "WHEN") {
afterThenOrElse = false;
continue;
}
if (afterThenOrElse && child instanceof ExpressionNode && child.get() instanceof Expressions.Source) {
const issue = this.checkLiteralSource(child as ExpressionNode, file);
if (issue) {
issues.push(issue);
}
afterThenOrElse = false;
}
}
}
private checkSwitchBodyBranches(switchBody: ExpressionNode, file: ABAPFile, issues: Issue[]): void {
// SwitchBody: <source> WHEN <val> [OR <val>]* THEN <source> [ELSE <source>]
// First Source is the operand; Source after THEN/ELSE are result values
let firstSourceSeen = false;
let afterThenOrElse = false;
for (const child of switchBody.getChildren()) {
const tokenStr = child.getFirstToken().getStr().toUpperCase();
if (tokenStr === "THEN" || tokenStr === "ELSE") {
afterThenOrElse = true;
continue;
}
if (tokenStr === "WHEN" || tokenStr === "OR") {
afterThenOrElse = false;
continue;
}
if (child instanceof ExpressionNode && child.get() instanceof Expressions.Source) {
if (!firstSourceSeen) {
firstSourceSeen = true;
continue;
}
if (afterThenOrElse) {
const issue = this.checkLiteralSource(child as ExpressionNode, file);
if (issue) {
issues.push(issue);
}
afterThenOrElse = false;
}
}
}
}
private checkCompareBoolLiteral(
compare: ExpressionNode,
boolVars: Set<string>,
file: ABAPFile,
issues: Issue[],
): void {
// Compare: Source CompareOperator Source (or other forms)
const sources = compare.findDirectExpressions(Expressions.Source);
if (sources.length < 2) {
return;
}
const [left, right] = sources;
const leftStr = left.concatTokens().toUpperCase();
const rightStr = right.concatTokens().toUpperCase();
let literalSource: ExpressionNode | undefined;
if (boolVars.has(leftStr) && !VALID_VALUES.has(rightStr)) {
literalSource = right;
} else if (boolVars.has(rightStr) && !VALID_VALUES.has(leftStr)) {
literalSource = left;
}
if (literalSource) {
const issue = this.checkLiteralSource(literalSource, file);
if (issue) {
issues.push(issue);
}
}
}
}
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