/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { invalidExpression, invalidTransitionAlias } from '../error_helpers';
export const ANY_STATE = '*';
export function parseTransitionExpr(transitionValue, errors) {
    const expressions = [];
    if (typeof transitionValue == 'string') {
        transitionValue.split(/\s*,\s*/).forEach(str => parseInnerTransitionStr(str, expressions, errors));
    }
    else {
        expressions.push(transitionValue);
    }
    return expressions;
}
function parseInnerTransitionStr(eventStr, expressions, errors) {
    if (eventStr[0] == ':') {
        const result = parseAnimationAlias(eventStr, errors);
        if (typeof result == 'function') {
            expressions.push(result);
            return;
        }
        eventStr = result;
    }
    const match = eventStr.match(/^(\*|[-\w]+)\s*(<?[=-]>)\s*(\*|[-\w]+)$/);
    if (match == null || match.length < 4) {
        errors.push(invalidExpression(eventStr));
        return expressions;
    }
    const fromState = match[1];
    const separator = match[2];
    const toState = match[3];
    expressions.push(makeLambdaFromStates(fromState, toState));
    const isFullAnyStateExpr = fromState == ANY_STATE && toState == ANY_STATE;
    if (separator[0] == '<' && !isFullAnyStateExpr) {
        expressions.push(makeLambdaFromStates(toState, fromState));
    }
}
function parseAnimationAlias(alias, errors) {
    switch (alias) {
        case ':enter':
            return 'void => *';
        case ':leave':
            return '* => void';
        case ':increment':
            return (fromState, toState) => parseFloat(toState) > parseFloat(fromState);
        case ':decrement':
            return (fromState, toState) => parseFloat(toState) < parseFloat(fromState);
        default:
            errors.push(invalidTransitionAlias(alias));
            return '* => *';
    }
}
// DO NOT REFACTOR ... keep the follow set instantiations
// with the values intact (closure compiler for some reason
// removes follow-up lines that add the values outside of
// the constructor...
const TRUE_BOOLEAN_VALUES = new Set(['true', '1']);
const FALSE_BOOLEAN_VALUES = new Set(['false', '0']);
function makeLambdaFromStates(lhs, rhs) {
    const LHS_MATCH_BOOLEAN = TRUE_BOOLEAN_VALUES.has(lhs) || FALSE_BOOLEAN_VALUES.has(lhs);
    const RHS_MATCH_BOOLEAN = TRUE_BOOLEAN_VALUES.has(rhs) || FALSE_BOOLEAN_VALUES.has(rhs);
    return (fromState, toState) => {
        let lhsMatch = lhs == ANY_STATE || lhs == fromState;
        let rhsMatch = rhs == ANY_STATE || rhs == toState;
        if (!lhsMatch && LHS_MATCH_BOOLEAN && typeof fromState === 'boolean') {
            lhsMatch = fromState ? TRUE_BOOLEAN_VALUES.has(lhs) : FALSE_BOOLEAN_VALUES.has(lhs);
        }
        if (!rhsMatch && RHS_MATCH_BOOLEAN && typeof toState === 'boolean') {
            rhsMatch = toState ? TRUE_BOOLEAN_VALUES.has(rhs) : FALSE_BOOLEAN_VALUES.has(rhs);
        }
        return lhsMatch && rhsMatch;
    };
}
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {invalidExpression, invalidTransitionAlias} from '../error_helpers';\n\nexport const ANY_STATE = '*';\nexport declare type TransitionMatcherFn =\n    (fromState: any, toState: any, element: any, params: {[key: string]: any}) => boolean;\n\nexport function parseTransitionExpr(\n    transitionValue: string|TransitionMatcherFn, errors: Error[]): TransitionMatcherFn[] {\n  const expressions: TransitionMatcherFn[] = [];\n  if (typeof transitionValue == 'string') {\n    transitionValue.split(/\\s*,\\s*/).forEach(\n        str => parseInnerTransitionStr(str, expressions, errors));\n  } else {\n    expressions.push(<TransitionMatcherFn>transitionValue);\n  }\n  return expressions;\n}\n\nfunction parseInnerTransitionStr(\n    eventStr: string, expressions: TransitionMatcherFn[], errors: Error[]) {\n  if (eventStr[0] == ':') {\n    const result = parseAnimationAlias(eventStr, errors);\n    if (typeof result == 'function') {\n      expressions.push(result);\n      return;\n    }\n    eventStr = result;\n  }\n\n  const match = eventStr.match(/^(\\*|[-\\w]+)\\s*(<?[=-]>)\\s*(\\*|[-\\w]+)$/);\n  if (match == null || match.length < 4) {\n    errors.push(invalidExpression(eventStr));\n    return expressions;\n  }\n\n  const fromState = match[1];\n  const separator = match[2];\n  const toState = match[3];\n  expressions.push(makeLambdaFromStates(fromState, toState));\n\n  const isFullAnyStateExpr = fromState == ANY_STATE && toState == ANY_STATE;\n  if (separator[0] == '<' && !isFullAnyStateExpr) {\n    expressions.push(makeLambdaFromStates(toState, fromState));\n  }\n}\n\nfunction parseAnimationAlias(alias: string, errors: Error[]): string|TransitionMatcherFn {\n  switch (alias) {\n    case ':enter':\n      return 'void => *';\n    case ':leave':\n      return '* => void';\n    case ':increment':\n      return (fromState: any, toState: any): boolean => parseFloat(toState) > parseFloat(fromState);\n    case ':decrement':\n      return (fromState: any, toState: any): boolean => parseFloat(toState) < parseFloat(fromState);\n    default:\n      errors.push(invalidTransitionAlias(alias));\n      return '* => *';\n  }\n}\n\n// DO NOT REFACTOR ... keep the follow set instantiations\n// with the values intact (closure compiler for some reason\n// removes follow-up lines that add the values outside of\n// the constructor...\nconst TRUE_BOOLEAN_VALUES = new Set<string>(['true', '1']);\nconst FALSE_BOOLEAN_VALUES = new Set<string>(['false', '0']);\n\nfunction makeLambdaFromStates(lhs: string, rhs: string): TransitionMatcherFn {\n  const LHS_MATCH_BOOLEAN = TRUE_BOOLEAN_VALUES.has(lhs) || FALSE_BOOLEAN_VALUES.has(lhs);\n  const RHS_MATCH_BOOLEAN = TRUE_BOOLEAN_VALUES.has(rhs) || FALSE_BOOLEAN_VALUES.has(rhs);\n\n  return (fromState: any, toState: any): boolean => {\n    let lhsMatch = lhs == ANY_STATE || lhs == fromState;\n    let rhsMatch = rhs == ANY_STATE || rhs == toState;\n\n    if (!lhsMatch && LHS_MATCH_BOOLEAN && typeof fromState === 'boolean') {\n      lhsMatch = fromState ? TRUE_BOOLEAN_VALUES.has(lhs) : FALSE_BOOLEAN_VALUES.has(lhs);\n    }\n    if (!rhsMatch && RHS_MATCH_BOOLEAN && typeof toState === 'boolean') {\n      rhsMatch = toState ? TRUE_BOOLEAN_VALUES.has(rhs) : FALSE_BOOLEAN_VALUES.has(rhs);\n    }\n\n    return lhsMatch && rhsMatch;\n  };\n}\n"]}