/**
 * @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 * as o from '../../output/output_ast';
import { splitAtColon } from '../../util';
import * as t from '../r3_ast';
import { isI18nAttribute } from './i18n/util';
/**
 * Checks whether an object key contains potentially unsafe chars, thus the key should be wrapped in
 * quotes. Note: we do not wrap all keys into quotes, as it may have impact on minification and may
 * bot work in some cases when object keys are mangled by minifier.
 *
 * TODO(FW-1136): this is a temporary solution, we need to come up with a better way of working with
 * inputs that contain potentially unsafe chars.
 */
const UNSAFE_OBJECT_KEY_NAME_REGEXP = /[-.]/;
/** Name of the temporary to use during data binding */
export const TEMPORARY_NAME = '_t';
/** Name of the context parameter passed into a template function */
export const CONTEXT_NAME = 'ctx';
/** Name of the RenderFlag passed into a template function */
export const RENDER_FLAGS = 'rf';
/** The prefix reference variables */
export const REFERENCE_PREFIX = '_r';
/** The name of the implicit context reference */
export const IMPLICIT_REFERENCE = '$implicit';
/** Non bindable attribute name **/
export const NON_BINDABLE_ATTR = 'ngNonBindable';
/** Name for the variable keeping track of the context returned by `ɵɵrestoreView`. */
export const RESTORED_VIEW_CONTEXT_NAME = 'restoredCtx';
/**
 * Creates an allocator for a temporary variable.
 *
 * A variable declaration is added to the statements the first time the allocator is invoked.
 */
export function temporaryAllocator(statements, name) {
    let temp = null;
    return () => {
        if (!temp) {
            statements.push(new o.DeclareVarStmt(TEMPORARY_NAME, undefined, o.DYNAMIC_TYPE));
            temp = o.variable(name);
        }
        return temp;
    };
}
export function unsupported(feature) {
    if (this) {
        throw new Error(`Builder ${this.constructor.name} doesn't support ${feature} yet`);
    }
    throw new Error(`Feature ${feature} is not supported yet`);
}
export function invalid(arg) {
    throw new Error(`Invalid state: Visitor ${this.constructor.name} doesn't handle ${arg.constructor.name}`);
}
export function asLiteral(value) {
    if (Array.isArray(value)) {
        return o.literalArr(value.map(asLiteral));
    }
    return o.literal(value, o.INFERRED_TYPE);
}
export function conditionallyCreateMapObjectLiteral(keys, keepDeclared) {
    if (Object.getOwnPropertyNames(keys).length > 0) {
        return mapToExpression(keys, keepDeclared);
    }
    return null;
}
function mapToExpression(map, keepDeclared) {
    return o.literalMap(Object.getOwnPropertyNames(map).map(key => {
        // canonical syntax: `dirProp: publicProp`
        // if there is no `:`, use dirProp = elProp
        const value = map[key];
        let declaredName;
        let publicName;
        let minifiedName;
        let needsDeclaredName;
        if (Array.isArray(value)) {
            [publicName, declaredName] = value;
            minifiedName = key;
            needsDeclaredName = publicName !== declaredName;
        }
        else {
            [declaredName, publicName] = splitAtColon(key, [key, value]);
            minifiedName = declaredName;
            // Only include the declared name if extracted from the key, i.e. the key contains a colon.
            // Otherwise the declared name should be omitted even if it is different from the public name,
            // as it may have already been minified.
            needsDeclaredName = publicName !== declaredName && key.includes(':');
        }
        return {
            key: minifiedName,
            // put quotes around keys that contain potentially unsafe characters
            quoted: UNSAFE_OBJECT_KEY_NAME_REGEXP.test(minifiedName),
            value: (keepDeclared && needsDeclaredName) ?
                o.literalArr([asLiteral(publicName), asLiteral(declaredName)]) :
                asLiteral(publicName)
        };
    }));
}
/**
 *  Remove trailing null nodes as they are implied.
 */
export function trimTrailingNulls(parameters) {
    while (o.isNull(parameters[parameters.length - 1])) {
        parameters.pop();
    }
    return parameters;
}
export function getQueryPredicate(query, constantPool) {
    if (Array.isArray(query.predicate)) {
        let predicate = [];
        query.predicate.forEach((selector) => {
            // Each item in predicates array may contain strings with comma-separated refs
            // (for ex. 'ref, ref1, ..., refN'), thus we extract individual refs and store them
            // as separate array entities
            const selectors = selector.split(',').map(token => o.literal(token.trim()));
            predicate.push(...selectors);
        });
        return constantPool.getConstLiteral(o.literalArr(predicate), true);
    }
    else {
        return query.predicate;
    }
}
/**
 * A representation for an object literal used during codegen of definition objects. The generic
 * type `T` allows to reference a documented type of the generated structure, such that the
 * property names that are set can be resolved to their documented declaration.
 */
export class DefinitionMap {
    constructor() {
        this.values = [];
    }
    set(key, value) {
        if (value) {
            this.values.push({ key: key, value, quoted: false });
        }
    }
    toLiteralMap() {
        return o.literalMap(this.values);
    }
}
/**
 * Extract a map of properties to values for a given element or template node, which can be used
 * by the directive matching machinery.
 *
 * @param elOrTpl the element or template in question
 * @return an object set up for directive matching. For attributes on the element/template, this
 * object maps a property name to its (static) value. For any bindings, this map simply maps the
 * property name to an empty string.
 */
export function getAttrsForDirectiveMatching(elOrTpl) {
    const attributesMap = {};
    if (elOrTpl instanceof t.Template && elOrTpl.tagName !== 'ng-template') {
        elOrTpl.templateAttrs.forEach(a => attributesMap[a.name] = '');
    }
    else {
        elOrTpl.attributes.forEach(a => {
            if (!isI18nAttribute(a.name)) {
                attributesMap[a.name] = a.value;
            }
        });
        elOrTpl.inputs.forEach(i => {
            attributesMap[i.name] = '';
        });
        elOrTpl.outputs.forEach(o => {
            attributesMap[o.name] = '';
        });
    }
    return attributesMap;
}
/** Returns a call expression to a chained instruction, e.g. `property(params[0])(params[1])`. */
export function chainedInstruction(reference, calls, span) {
    let expression = o.importExpr(reference, null, span);
    if (calls.length > 0) {
        for (let i = 0; i < calls.length; i++) {
            expression = expression.callFn(calls[i], span);
        }
    }
    else {
        // Add a blank invocation, in case the `calls` array is empty.
        expression = expression.callFn([], span);
    }
    return expression;
}
/**
 * Gets the number of arguments expected to be passed to a generated instruction in the case of
 * interpolation instructions.
 * @param interpolation An interpolation ast
 */
export function getInterpolationArgsLength(interpolation) {
    const { expressions, strings } = interpolation;
    if (expressions.length === 1 && strings.length === 2 && strings[0] === '' && strings[1] === '') {
        // If the interpolation has one interpolated value, but the prefix and suffix are both empty
        // strings, we only pass one argument, to a special instruction like `propertyInterpolate` or
        // `textInterpolate`.
        return 1;
    }
    else {
        return expressions.length + strings.length;
    }
}
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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 {ConstantPool} from '../../constant_pool';\nimport {Interpolation} from '../../expression_parser/ast';\nimport * as o from '../../output/output_ast';\nimport {ParseSourceSpan} from '../../parse_util';\nimport {splitAtColon} from '../../util';\nimport * as t from '../r3_ast';\n\nimport {R3QueryMetadata} from './api';\nimport {isI18nAttribute} from './i18n/util';\n\n\n/**\n * Checks whether an object key contains potentially unsafe chars, thus the key should be wrapped in\n * quotes. Note: we do not wrap all keys into quotes, as it may have impact on minification and may\n * bot work in some cases when object keys are mangled by minifier.\n *\n * TODO(FW-1136): this is a temporary solution, we need to come up with a better way of working with\n * inputs that contain potentially unsafe chars.\n */\nconst UNSAFE_OBJECT_KEY_NAME_REGEXP = /[-.]/;\n\n/** Name of the temporary to use during data binding */\nexport const TEMPORARY_NAME = '_t';\n\n/** Name of the context parameter passed into a template function */\nexport const CONTEXT_NAME = 'ctx';\n\n/** Name of the RenderFlag passed into a template function */\nexport const RENDER_FLAGS = 'rf';\n\n/** The prefix reference variables */\nexport const REFERENCE_PREFIX = '_r';\n\n/** The name of the implicit context reference */\nexport const IMPLICIT_REFERENCE = '$implicit';\n\n/** Non bindable attribute name **/\nexport const NON_BINDABLE_ATTR = 'ngNonBindable';\n\n/** Name for the variable keeping track of the context returned by `ɵɵrestoreView`. */\nexport const RESTORED_VIEW_CONTEXT_NAME = 'restoredCtx';\n\n/**\n * Creates an allocator for a temporary variable.\n *\n * A variable declaration is added to the statements the first time the allocator is invoked.\n */\nexport function temporaryAllocator(statements: o.Statement[], name: string): () => o.ReadVarExpr {\n  let temp: o.ReadVarExpr|null = null;\n  return () => {\n    if (!temp) {\n      statements.push(new o.DeclareVarStmt(TEMPORARY_NAME, undefined, o.DYNAMIC_TYPE));\n      temp = o.variable(name);\n    }\n    return temp;\n  };\n}\n\n\nexport function unsupported(this: void|Function, feature: string): never {\n  if (this) {\n    throw new Error(`Builder ${this.constructor.name} doesn't support ${feature} yet`);\n  }\n  throw new Error(`Feature ${feature} is not supported yet`);\n}\n\nexport function invalid<T>(this: t.Visitor, arg: o.Expression|o.Statement|t.Node): never {\n  throw new Error(\n      `Invalid state: Visitor ${this.constructor.name} doesn't handle ${arg.constructor.name}`);\n}\n\nexport function asLiteral(value: any): o.Expression {\n  if (Array.isArray(value)) {\n    return o.literalArr(value.map(asLiteral));\n  }\n  return o.literal(value, o.INFERRED_TYPE);\n}\n\nexport function conditionallyCreateMapObjectLiteral(\n    keys: {[key: string]: string|string[]}, keepDeclared?: boolean): o.Expression|null {\n  if (Object.getOwnPropertyNames(keys).length > 0) {\n    return mapToExpression(keys, keepDeclared);\n  }\n  return null;\n}\n\nfunction mapToExpression(\n    map: {[key: string]: string|string[]}, keepDeclared?: boolean): o.Expression {\n  return o.literalMap(Object.getOwnPropertyNames(map).map(key => {\n    // canonical syntax: `dirProp: publicProp`\n    // if there is no `:`, use dirProp = elProp\n    const value = map[key];\n    let declaredName: string;\n    let publicName: string;\n    let minifiedName: string;\n    let needsDeclaredName: boolean;\n    if (Array.isArray(value)) {\n      [publicName, declaredName] = value;\n      minifiedName = key;\n      needsDeclaredName = publicName !== declaredName;\n    } else {\n      [declaredName, publicName] = splitAtColon(key, [key, value]);\n      minifiedName = declaredName;\n      // Only include the declared name if extracted from the key, i.e. the key contains a colon.\n      // Otherwise the declared name should be omitted even if it is different from the public name,\n      // as it may have already been minified.\n      needsDeclaredName = publicName !== declaredName && key.includes(':');\n    }\n    return {\n      key: minifiedName,\n      // put quotes around keys that contain potentially unsafe characters\n      quoted: UNSAFE_OBJECT_KEY_NAME_REGEXP.test(minifiedName),\n      value: (keepDeclared && needsDeclaredName) ?\n          o.literalArr([asLiteral(publicName), asLiteral(declaredName)]) :\n          asLiteral(publicName)\n    };\n  }));\n}\n\n/**\n *  Remove trailing null nodes as they are implied.\n */\nexport function trimTrailingNulls(parameters: o.Expression[]): o.Expression[] {\n  while (o.isNull(parameters[parameters.length - 1])) {\n    parameters.pop();\n  }\n  return parameters;\n}\n\nexport function getQueryPredicate(\n    query: R3QueryMetadata, constantPool: ConstantPool): o.Expression {\n  if (Array.isArray(query.predicate)) {\n    let predicate: o.Expression[] = [];\n    query.predicate.forEach((selector: string): void => {\n      // Each item in predicates array may contain strings with comma-separated refs\n      // (for ex. 'ref, ref1, ..., refN'), thus we extract individual refs and store them\n      // as separate array entities\n      const selectors = selector.split(',').map(token => o.literal(token.trim()));\n      predicate.push(...selectors);\n    });\n    return constantPool.getConstLiteral(o.literalArr(predicate), true);\n  } else {\n    return query.predicate;\n  }\n}\n\n/**\n * A representation for an object literal used during codegen of definition objects. The generic\n * type `T` allows to reference a documented type of the generated structure, such that the\n * property names that are set can be resolved to their documented declaration.\n */\nexport class DefinitionMap<T = any> {\n  values: {key: string, quoted: boolean, value: o.Expression}[] = [];\n\n  set(key: keyof T, value: o.Expression|null): void {\n    if (value) {\n      this.values.push({key: key as string, value, quoted: false});\n    }\n  }\n\n  toLiteralMap(): o.LiteralMapExpr {\n    return o.literalMap(this.values);\n  }\n}\n\n/**\n * Extract a map of properties to values for a given element or template node, which can be used\n * by the directive matching machinery.\n *\n * @param elOrTpl the element or template in question\n * @return an object set up for directive matching. For attributes on the element/template, this\n * object maps a property name to its (static) value. For any bindings, this map simply maps the\n * property name to an empty string.\n */\nexport function getAttrsForDirectiveMatching(elOrTpl: t.Element|\n                                             t.Template): {[name: string]: string} {\n  const attributesMap: {[name: string]: string} = {};\n\n\n  if (elOrTpl instanceof t.Template && elOrTpl.tagName !== 'ng-template') {\n    elOrTpl.templateAttrs.forEach(a => attributesMap[a.name] = '');\n  } else {\n    elOrTpl.attributes.forEach(a => {\n      if (!isI18nAttribute(a.name)) {\n        attributesMap[a.name] = a.value;\n      }\n    });\n\n    elOrTpl.inputs.forEach(i => {\n      attributesMap[i.name] = '';\n    });\n    elOrTpl.outputs.forEach(o => {\n      attributesMap[o.name] = '';\n    });\n  }\n\n  return attributesMap;\n}\n\n/** Returns a call expression to a chained instruction, e.g. `property(params[0])(params[1])`. */\nexport function chainedInstruction(\n    reference: o.ExternalReference, calls: o.Expression[][], span?: ParseSourceSpan|null) {\n  let expression = o.importExpr(reference, null, span) as o.Expression;\n\n  if (calls.length > 0) {\n    for (let i = 0; i < calls.length; i++) {\n      expression = expression.callFn(calls[i], span);\n    }\n  } else {\n    // Add a blank invocation, in case the `calls` array is empty.\n    expression = expression.callFn([], span);\n  }\n\n  return expression;\n}\n\n/**\n * Gets the number of arguments expected to be passed to a generated instruction in the case of\n * interpolation instructions.\n * @param interpolation An interpolation ast\n */\nexport function getInterpolationArgsLength(interpolation: Interpolation) {\n  const {expressions, strings} = interpolation;\n  if (expressions.length === 1 && strings.length === 2 && strings[0] === '' && strings[1] === '') {\n    // If the interpolation has one interpolated value, but the prefix and suffix are both empty\n    // strings, we only pass one argument, to a special instruction like `propertyInterpolate` or\n    // `textInterpolate`.\n    return 1;\n  } else {\n    return expressions.length + strings.length;\n  }\n}\n"]}