@angular-devkit/schematics/src/rules/base.js

"use strict";
/**
 * @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
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.applyToSubtree = exports.composeFileOperators = exports.forEach = exports.partitionApplyMerge = exports.when = exports.branchAndMerge = exports.asSource = exports.filter = exports.noop = exports.mergeWith = exports.apply = exports.chain = exports.empty = exports.source = void 0;
const rxjs_1 = require("rxjs");
const operators_1 = require("rxjs/operators");
const exception_1 = require("../exception/exception");
const host_tree_1 = require("../tree/host-tree");
const interface_1 = require("../tree/interface");
const scoped_1 = require("../tree/scoped");
const static_1 = require("../tree/static");
const call_1 = require("./call");
/**
 * A Source that returns an tree as its single value.
 */
function source(tree) {
    return () => tree;
}
exports.source = source;
/**
 * A source that returns an empty tree.
 */
function empty() {
    return () => (0, static_1.empty)();
}
exports.empty = empty;
/**
 * Chain multiple rules into a single rule.
 */
function chain(rules) {
    return async (initialTree, context) => {
        let intermediateTree;
        for await (const rule of rules) {
            intermediateTree = (0, call_1.callRule)(rule, intermediateTree !== null && intermediateTree !== void 0 ? intermediateTree : initialTree, context);
        }
        return () => intermediateTree;
    };
}
exports.chain = chain;
/**
 * Apply multiple rules to a source, and returns the source transformed.
 */
function apply(source, rules) {
    return (context) => (0, call_1.callRule)(chain(rules), (0, call_1.callSource)(source, context), context);
}
exports.apply = apply;
/**
 * Merge an input tree with the source passed in.
 */
function mergeWith(source, strategy = interface_1.MergeStrategy.Default) {
    return (tree, context) => {
        return (0, call_1.callSource)(source, context).pipe((0, operators_1.map)((sourceTree) => tree.merge(sourceTree, strategy || context.strategy)), (0, operators_1.mapTo)(tree));
    };
}
exports.mergeWith = mergeWith;
function noop() {
    return () => { };
}
exports.noop = noop;
function filter(predicate) {
    return (tree) => {
        if (host_tree_1.HostTree.isHostTree(tree)) {
            return new host_tree_1.FilterHostTree(tree, predicate);
        }
        else {
            throw new exception_1.SchematicsException('Tree type is not supported.');
        }
    };
}
exports.filter = filter;
function asSource(rule) {
    return (context) => (0, call_1.callRule)(rule, (0, static_1.empty)(), context);
}
exports.asSource = asSource;
function branchAndMerge(rule, strategy = interface_1.MergeStrategy.Default) {
    return (tree, context) => {
        return (0, call_1.callRule)(rule, tree.branch(), context).pipe((0, operators_1.map)((branch) => tree.merge(branch, strategy || context.strategy)), (0, operators_1.mapTo)(tree));
    };
}
exports.branchAndMerge = branchAndMerge;
function when(predicate, operator) {
    return (entry) => {
        if (predicate(entry.path, entry)) {
            return operator(entry);
        }
        else {
            return entry;
        }
    };
}
exports.when = when;
function partitionApplyMerge(predicate, ruleYes, ruleNo) {
    return (tree, context) => {
        const [yes, no] = (0, static_1.partition)(tree, predicate);
        return (0, rxjs_1.concat)((0, call_1.callRule)(ruleYes, yes, context), (0, call_1.callRule)(ruleNo || noop(), no, context)).pipe((0, operators_1.toArray)(), (0, operators_1.map)(([yesTree, noTree]) => {
            yesTree.merge(noTree, context.strategy);
            return yesTree;
        }));
    };
}
exports.partitionApplyMerge = partitionApplyMerge;
function forEach(operator) {
    return (tree) => {
        tree.visit((path, entry) => {
            if (!entry) {
                return;
            }
            const newEntry = operator(entry);
            if (newEntry === entry) {
                return;
            }
            if (newEntry === null) {
                tree.delete(path);
                return;
            }
            if (newEntry.path != path) {
                tree.rename(path, newEntry.path);
            }
            if (!newEntry.content.equals(entry.content)) {
                tree.overwrite(newEntry.path, newEntry.content);
            }
        });
    };
}
exports.forEach = forEach;
function composeFileOperators(operators) {
    return (entry) => {
        let current = entry;
        for (const op of operators) {
            current = op(current);
            if (current === null) {
                // Deleted, just return.
                return null;
            }
        }
        return current;
    };
}
exports.composeFileOperators = composeFileOperators;
function applyToSubtree(path, rules) {
    return (tree, context) => {
        const scoped = new scoped_1.ScopedTree(tree, path);
        return (0, call_1.callRule)(chain(rules), scoped, context).pipe((0, operators_1.map)((result) => {
            if (result === scoped) {
                return tree;
            }
            else {
                throw new exception_1.SchematicsException('Original tree must be returned from all rules when using "applyToSubtree".');
            }
        }));
    };
}
exports.applyToSubtree = applyToSubtree;
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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 { Observable, concat } from 'rxjs';\nimport { map, mapTo, toArray } from 'rxjs/operators';\nimport { FileOperator, Rule, Source } from '../engine/interface';\nimport { SchematicsException } from '../exception/exception';\nimport { FilterHostTree, HostTree } from '../tree/host-tree';\nimport { FileEntry, FilePredicate, MergeStrategy, Tree } from '../tree/interface';\nimport { ScopedTree } from '../tree/scoped';\nimport { partition, empty as staticEmpty } from '../tree/static';\nimport { callRule, callSource } from './call';\n\n/**\n * A Source that returns an tree as its single value.\n */\nexport function source(tree: Tree): Source {\n  return () => tree;\n}\n\n/**\n * A source that returns an empty tree.\n */\nexport function empty(): Source {\n  return () => staticEmpty();\n}\n\n/**\n * Chain multiple rules into a single rule.\n */\nexport function chain(rules: Iterable<Rule> | AsyncIterable<Rule>): Rule {\n  return async (initialTree, context) => {\n    let intermediateTree: Observable<Tree> | undefined;\n    for await (const rule of rules) {\n      intermediateTree = callRule(rule, intermediateTree ?? initialTree, context);\n    }\n\n    return () => intermediateTree;\n  };\n}\n\n/**\n * Apply multiple rules to a source, and returns the source transformed.\n */\nexport function apply(source: Source, rules: Rule[]): Source {\n  return (context) => callRule(chain(rules), callSource(source, context), context);\n}\n\n/**\n * Merge an input tree with the source passed in.\n */\nexport function mergeWith(source: Source, strategy: MergeStrategy = MergeStrategy.Default): Rule {\n  return (tree, context) => {\n    return callSource(source, context).pipe(\n      map((sourceTree) => tree.merge(sourceTree, strategy || context.strategy)),\n      mapTo(tree),\n    );\n  };\n}\n\nexport function noop(): Rule {\n  return () => {};\n}\n\nexport function filter(predicate: FilePredicate<boolean>): Rule {\n  return (tree: Tree) => {\n    if (HostTree.isHostTree(tree)) {\n      return new FilterHostTree(tree, predicate);\n    } else {\n      throw new SchematicsException('Tree type is not supported.');\n    }\n  };\n}\n\nexport function asSource(rule: Rule): Source {\n  return (context) => callRule(rule, staticEmpty(), context);\n}\n\nexport function branchAndMerge(rule: Rule, strategy = MergeStrategy.Default): Rule {\n  return (tree, context) => {\n    return callRule(rule, tree.branch(), context).pipe(\n      map((branch) => tree.merge(branch, strategy || context.strategy)),\n      mapTo(tree),\n    );\n  };\n}\n\nexport function when(predicate: FilePredicate<boolean>, operator: FileOperator): FileOperator {\n  return (entry: FileEntry) => {\n    if (predicate(entry.path, entry)) {\n      return operator(entry);\n    } else {\n      return entry;\n    }\n  };\n}\n\nexport function partitionApplyMerge(\n  predicate: FilePredicate<boolean>,\n  ruleYes: Rule,\n  ruleNo?: Rule,\n): Rule {\n  return (tree, context) => {\n    const [yes, no] = partition(tree, predicate);\n\n    return concat(callRule(ruleYes, yes, context), callRule(ruleNo || noop(), no, context)).pipe(\n      toArray(),\n      map(([yesTree, noTree]) => {\n        yesTree.merge(noTree, context.strategy);\n\n        return yesTree;\n      }),\n    );\n  };\n}\n\nexport function forEach(operator: FileOperator): Rule {\n  return (tree: Tree) => {\n    tree.visit((path, entry) => {\n      if (!entry) {\n        return;\n      }\n      const newEntry = operator(entry);\n      if (newEntry === entry) {\n        return;\n      }\n      if (newEntry === null) {\n        tree.delete(path);\n\n        return;\n      }\n      if (newEntry.path != path) {\n        tree.rename(path, newEntry.path);\n      }\n      if (!newEntry.content.equals(entry.content)) {\n        tree.overwrite(newEntry.path, newEntry.content);\n      }\n    });\n  };\n}\n\nexport function composeFileOperators(operators: FileOperator[]): FileOperator {\n  return (entry: FileEntry) => {\n    let current: FileEntry | null = entry;\n    for (const op of operators) {\n      current = op(current);\n\n      if (current === null) {\n        // Deleted, just return.\n        return null;\n      }\n    }\n\n    return current;\n  };\n}\n\nexport function applyToSubtree(path: string, rules: Rule[]): Rule {\n  return (tree, context) => {\n    const scoped = new ScopedTree(tree, path);\n\n    return callRule(chain(rules), scoped, context).pipe(\n      map((result) => {\n        if (result === scoped) {\n          return tree;\n        } else {\n          throw new SchematicsException(\n            'Original tree must be returned from all rules when using \"applyToSubtree\".',\n          );\n        }\n      }),\n    );\n  };\n}\n"]}