58 lines
2.0 KiB
TypeScript
58 lines
2.0 KiB
TypeScript
import { IScriptCode } from './IScriptCode';
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export class ScriptCode implements IScriptCode {
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constructor(
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scriptName: string,
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public readonly execute: string,
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public readonly revert: string) {
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if (!scriptName) {
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throw new Error('script name is undefined');
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}
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validateCode(scriptName, execute);
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if (revert) {
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scriptName = `${scriptName} (revert)`;
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validateCode(scriptName, revert);
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if (execute === revert) {
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throw new Error(`${scriptName}: Code itself and its reverting code cannot be the same`);
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}
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}
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}
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}
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function validateCode(name: string, code: string): void {
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if (!code || code.length === 0) {
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throw new Error(`code of ${name} is empty or undefined`);
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}
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ensureNoEmptyLines(name, code);
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ensureCodeHasUniqueLines(name, code);
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}
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function ensureNoEmptyLines(name: string, code: string): void {
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if (code.split('\n').some((line) => line.trim().length === 0)) {
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throw Error(`script has empty lines "${name}"`);
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}
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}
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function ensureCodeHasUniqueLines(name: string, code: string): void {
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const lines = code.split('\n')
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.filter((line) => !shouldIgnoreLine(line));
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if (lines.length === 0) {
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return;
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}
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const duplicateLines = lines.filter((e, i, a) => a.indexOf(e) !== i);
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if (duplicateLines.length !== 0) {
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throw Error(`Duplicates detected in script "${name}":\n ${duplicateLines.join('\n')}`);
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}
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}
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function shouldIgnoreLine(codeLine: string): boolean {
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codeLine = codeLine.toLowerCase();
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const isCommentLine = () => codeLine.startsWith(':: ') || codeLine.startsWith('rem ');
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const consistsOfFrequentCommands = () => {
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const frequentCodeParts = [ '(', ')', 'else' ];
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const trimmed = codeLine.trim().split(' ');
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return trimmed.every((part) => frequentCodeParts.includes(part));
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};
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return isCommentLine() || consistsOfFrequentCommands();
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}
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