"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.isImported = exports.addBootstrapToModule = exports.addExportToModule = exports.addProviderToModule = exports.addImportToModule = exports.addDeclarationToModule = exports.addSymbolToNgModuleMetadata = exports.getFirstNgModuleName = exports.getDecoratorMetadata = exports.getContentOfKeyLiteral = exports.insertAfterLastOccurrence = exports.findNode = exports.getSourceNodes = exports.findNodes = void 0;
/**
 * @license
 * Copyright Google Inc. 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
 */
const ts = require("typescript");
const change_1 = require("./change");
const route_utils_1 = require("./route-utils");
/**
 * Find all nodes from the AST in the subtree of node of SyntaxKind kind.
 * @param node
 * @param kind
 * @param max The maximum number of items to return.
 * @return all nodes of kind, or [] if none is found
 */
function findNodes(node, kind, max = Infinity) {
    if (!node || max == 0) {
        return [];
    }
    const arr = [];
    if (node.kind === kind) {
        arr.push(node);
        max--;
    }
    if (max > 0) {
        for (const child of node.getChildren()) {
            findNodes(child, kind, max).forEach(node => {
                if (max > 0) {
                    arr.push(node);
                }
                max--;
            });
            if (max <= 0) {
                break;
            }
        }
    }
    return arr;
}
exports.findNodes = findNodes;
/**
 * Get all the nodes from a source.
 * @param sourceFile The source file object.
 * @returns {Observable<ts.Node>} An observable of all the nodes in the source.
 */
function getSourceNodes(sourceFile) {
    const nodes = [sourceFile];
    const result = [];
    while (nodes.length > 0) {
        const node = nodes.shift();
        if (node) {
            result.push(node);
            if (node.getChildCount(sourceFile) >= 0) {
                nodes.unshift(...node.getChildren());
            }
        }
    }
    return result;
}
exports.getSourceNodes = getSourceNodes;
function findNode(node, kind, text) {
    if (node.kind === kind && node.getText() === text) {
        // throw new Error(node.getText());
        return node;
    }
    let foundNode = null;
    ts.forEachChild(node, childNode => {
        foundNode = foundNode || findNode(childNode, kind, text);
    });
    return foundNode;
}
exports.findNode = findNode;
/**
 * Helper for sorting nodes.
 * @return function to sort nodes in increasing order of position in sourceFile
 */
function nodesByPosition(first, second) {
    return first.getStart() - second.getStart();
}
/**
 * Insert `toInsert` after the last occurence of `ts.SyntaxKind[nodes[i].kind]`
 * or after the last of occurence of `syntaxKind` if the last occurence is a sub child
 * of ts.SyntaxKind[nodes[i].kind] and save the changes in file.
 *
 * @param nodes insert after the last occurence of nodes
 * @param toInsert string to insert
 * @param file file to insert changes into
 * @param fallbackPos position to insert if toInsert happens to be the first occurence
 * @param syntaxKind the ts.SyntaxKind of the subchildren to insert after
 * @return Change instance
 * @throw Error if toInsert is first occurence but fall back is not set
 */
function insertAfterLastOccurrence(nodes, toInsert, file, fallbackPos, syntaxKind) {
    let lastItem = nodes.sort(nodesByPosition).pop();
    if (!lastItem) {
        throw new Error();
    }
    if (syntaxKind) {
        lastItem = findNodes(lastItem, syntaxKind).sort(nodesByPosition).pop();
    }
    if (!lastItem && fallbackPos == undefined) {
        throw new Error(`tried to insert ${toInsert} as first occurence with no fallback position`);
    }
    const lastItemPosition = lastItem ? lastItem.getEnd() : fallbackPos;
    return new change_1.InsertChange(file, lastItemPosition, toInsert);
}
exports.insertAfterLastOccurrence = insertAfterLastOccurrence;
function getContentOfKeyLiteral(_source, node) {
    if (node.kind == ts.SyntaxKind.Identifier) {
        return node.text;
    }
    else if (node.kind == ts.SyntaxKind.StringLiteral) {
        return node.text;
    }
    else {
        return null;
    }
}
exports.getContentOfKeyLiteral = getContentOfKeyLiteral;
function _angularImportsFromNode(node, _sourceFile) {
    const ms = node.moduleSpecifier;
    let modulePath;
    switch (ms.kind) {
        case ts.SyntaxKind.StringLiteral:
            modulePath = ms.text;
            break;
        default:
            return {};
    }
    if (!modulePath.startsWith('@angular/')) {
        return {};
    }
    if (node.importClause) {
        if (node.importClause.name) {
            // This is of the form `import Name from 'path'`. Ignore.
            return {};
        }
        else if (node.importClause.namedBindings) {
            const nb = node.importClause.namedBindings;
            if (nb.kind == ts.SyntaxKind.NamespaceImport) {
                // This is of the form `import * as name from 'path'`. Return `name.`.
                return {
                    [nb.name.text + '.']: modulePath,
                };
            }
            else {
                // This is of the form `import {a,b,c} from 'path'`
                const namedImports = nb;
                return namedImports.elements
                    .map((is) => is.propertyName ? is.propertyName.text : is.name.text)
                    .reduce((acc, curr) => {
                    acc[curr] = modulePath;
                    return acc;
                }, {});
            }
        }
        return {};
    }
    else {
        // This is of the form `import 'path';`. Nothing to do.
        return {};
    }
}
function getDecoratorMetadata(source, identifier, module) {
    const angularImports = findNodes(source, ts.SyntaxKind.ImportDeclaration)
        .map((node) => _angularImportsFromNode(node, source))
        .reduce((acc, current) => {
        for (const key of Object.keys(current)) {
            acc[key] = current[key];
        }
        return acc;
    }, {});
    return getSourceNodes(source)
        .filter(node => {
        return node.kind == ts.SyntaxKind.Decorator
            && node.expression.kind == ts.SyntaxKind.CallExpression;
    })
        .map(node => node.expression)
        .filter(expr => {
        if (expr.expression.kind == ts.SyntaxKind.Identifier) {
            const id = expr.expression;
            return id.getFullText(source) == identifier
                && angularImports[id.getFullText(source)] === module;
        }
        else if (expr.expression.kind == ts.SyntaxKind.PropertyAccessExpression) {
            // This covers foo.NgModule when importing * as foo.
            const paExpr = expr.expression;
            // If the left expression is not an identifier, just give up at that point.
            if (paExpr.expression.kind !== ts.SyntaxKind.Identifier) {
                return false;
            }
            const id = paExpr.name.text;
            const moduleId = paExpr.expression.getText(source);
            return id === identifier && (angularImports[moduleId + '.'] === module);
        }
        return false;
    })
        .filter(expr => expr.arguments[0]
        && expr.arguments[0].kind == ts.SyntaxKind.ObjectLiteralExpression)
        .map(expr => expr.arguments[0]);
}
exports.getDecoratorMetadata = getDecoratorMetadata;
function findClassDeclarationParent(node) {
    if (ts.isClassDeclaration(node)) {
        return node;
    }
    return node.parent && findClassDeclarationParent(node.parent);
}
/**
 * Given a source file with @NgModule class(es), find the name of the first @NgModule class.
 *
 * @param source source file containing one or more @NgModule
 * @returns the name of the first @NgModule, or `undefined` if none is found
 */
function getFirstNgModuleName(source) {
    // First, find the @NgModule decorators.
    const ngModulesMetadata = getDecoratorMetadata(source, 'NgModule', '@angular/core');
    if (ngModulesMetadata.length === 0) {
        return undefined;
    }
    // Then walk parent pointers up the AST, looking for the ClassDeclaration parent of the NgModule
    // metadata.
    const moduleClass = findClassDeclarationParent(ngModulesMetadata[0]);
    if (!moduleClass || !moduleClass.name) {
        return undefined;
    }
    // Get the class name of the module ClassDeclaration.
    return moduleClass.name.text;
}
exports.getFirstNgModuleName = getFirstNgModuleName;
function addSymbolToNgModuleMetadata(source, ngModulePath, metadataField, symbolName, importPath = null) {
    const nodes = getDecoratorMetadata(source, 'NgModule', '@angular/core');
    let node = nodes[0]; // tslint:disable-line:no-any
    // Find the decorator declaration.
    if (!node) {
        return [];
    }
    // Get all the children property assignment of object literals.
    const matchingProperties = node.properties
        .filter(prop => prop.kind == ts.SyntaxKind.PropertyAssignment)
        // Filter out every fields that's not "metadataField". Also handles string literals
        // (but not expressions).
        .filter((prop) => {
        const name = prop.name;
        switch (name.kind) {
            case ts.SyntaxKind.Identifier:
                return name.getText(source) == metadataField;
            case ts.SyntaxKind.StringLiteral:
                return name.text == metadataField;
        }
        return false;
    });
    // Get the last node of the array literal.
    if (!matchingProperties) {
        return [];
    }
    if (matchingProperties.length == 0) {
        // We haven't found the field in the metadata declaration. Insert a new field.
        const expr = node;
        let position;
        let toInsert;
        if (expr.properties.length == 0) {
            position = expr.getEnd() - 1;
            toInsert = `  ${metadataField}: [${symbolName}]\n`;
        }
        else {
            node = expr.properties[expr.properties.length - 1];
            position = node.getEnd();
            // Get the indentation of the last element, if any.
            const text = node.getFullText(source);
            const matches = text.match(/^\r?\n\s*/);
            if (matches.length > 0) {
                toInsert = `,${matches[0]}${metadataField}: [${symbolName}]`;
            }
            else {
                toInsert = `, ${metadataField}: [${symbolName}]`;
            }
        }
        if (importPath !== null) {
            return [
                new change_1.InsertChange(ngModulePath, position, toInsert),
                (0, route_utils_1.insertImport)(source, ngModulePath, symbolName.replace(/\..*$/, ''), importPath),
            ];
        }
        else {
            return [new change_1.InsertChange(ngModulePath, position, toInsert)];
        }
    }
    const assignment = matchingProperties[0];
    // If it's not an array, nothing we can do really.
    if (assignment.initializer.kind !== ts.SyntaxKind.ArrayLiteralExpression) {
        return [];
    }
    const arrLiteral = assignment.initializer;
    if (arrLiteral.elements.length == 0) {
        // Forward the property.
        node = arrLiteral;
    }
    else {
        node = arrLiteral.elements;
    }
    if (!node) {
        console.log('No app module found. Please add your new class to your component.');
        return [];
    }
    if (Array.isArray(node)) {
        const nodeArray = node;
        const symbolsArray = nodeArray.map(node => node.getText());
        if (symbolsArray.includes(symbolName)) {
            return [];
        }
        node = node[node.length - 1];
    }
    let toInsert;
    let position = node.getEnd();
    if (node.kind == ts.SyntaxKind.ObjectLiteralExpression && node === arrLiteral) {
        // We haven't found the field in the metadata declaration. Insert a new
        // field.
        const expr = node;
        if (expr.properties.length == 0) {
            position = expr.getEnd() - 1;
            toInsert = `  ${metadataField}: [${symbolName}]\n`;
        }
        else {
            node = expr.properties[expr.properties.length - 1];
            position = node.getEnd();
            // Get the indentation of the last element, if any.
            const text = node.getFullText(source);
            if (text.match('^\r?\r?\n')) {
                toInsert = `,${text.match(/^\r?\n\s+/)[0]}${metadataField}: [${symbolName}]`;
            }
            else {
                toInsert = `, ${metadataField}: [${symbolName}]`;
            }
        }
    }
    else if (node.kind == ts.SyntaxKind.ArrayLiteralExpression) {
        // We found the field but it's empty. Insert it just before the `]`.
        position--;
        toInsert = `${symbolName}`;
    }
    else {
        // Get the indentation of the last element, if any.
        const text = node.getFullText(source);
        if (text.match(/^\r?\n/)) {
            toInsert = `,${text.match(/^\r?\n(\r?)\s+/)[0]}${symbolName}`;
        }
        else {
            toInsert = `, ${symbolName}`;
        }
    }
    if (importPath !== null) {
        return [
            new change_1.InsertChange(ngModulePath, position, toInsert),
            (0, route_utils_1.insertImport)(source, ngModulePath, symbolName.replace(/\..*$/, ''), importPath),
        ];
    }
    return [new change_1.InsertChange(ngModulePath, position, toInsert)];
}
exports.addSymbolToNgModuleMetadata = addSymbolToNgModuleMetadata;
/**
 * Custom function to insert a declaration (component, pipe, directive)
 * into NgModule declarations. It also imports the component.
 */
function addDeclarationToModule(source, modulePath, classifiedName, importPath) {
    return addSymbolToNgModuleMetadata(source, modulePath, 'declarations', classifiedName, importPath);
}
exports.addDeclarationToModule = addDeclarationToModule;
/**
 * Custom function to insert an NgModule into NgModule imports. It also imports the module.
 */
function addImportToModule(source, modulePath, classifiedName, importPath) {
    return addSymbolToNgModuleMetadata(source, modulePath, 'imports', classifiedName, importPath);
}
exports.addImportToModule = addImportToModule;
/**
 * Custom function to insert a provider into NgModule. It also imports it.
 */
function addProviderToModule(source, modulePath, classifiedName, importPath) {
    return addSymbolToNgModuleMetadata(source, modulePath, 'providers', classifiedName, importPath);
}
exports.addProviderToModule = addProviderToModule;
/**
 * Custom function to insert an export into NgModule. It also imports it.
 */
function addExportToModule(source, modulePath, classifiedName, importPath) {
    return addSymbolToNgModuleMetadata(source, modulePath, 'exports', classifiedName, importPath);
}
exports.addExportToModule = addExportToModule;
/**
 * Custom function to insert an export into NgModule. It also imports it.
 */
function addBootstrapToModule(source, modulePath, classifiedName, importPath) {
    return addSymbolToNgModuleMetadata(source, modulePath, 'bootstrap', classifiedName, importPath);
}
exports.addBootstrapToModule = addBootstrapToModule;
/**
 * Determine if an import already exists.
 */
function isImported(source, classifiedName, importPath) {
    const allNodes = getSourceNodes(source);
    const matchingNodes = allNodes
        .filter(node => node.kind === ts.SyntaxKind.ImportDeclaration)
        .filter((imp) => imp.moduleSpecifier.kind === ts.SyntaxKind.StringLiteral)
        .filter((imp) => {
        return imp.moduleSpecifier.text === importPath;
    })
        .filter((imp) => {
        if (!imp.importClause) {
            return false;
        }
        const nodes = findNodes(imp.importClause, ts.SyntaxKind.ImportSpecifier)
            .filter(n => n.getText() === classifiedName);
        return nodes.length > 0;
    });
    return matchingNodes.length > 0;
}
exports.isImported = isImported;
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