"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var exception_1 = __importDefault(require("./exception"));
function Visitor() {
    this.parents = [];
}
Visitor.prototype = {
    constructor: Visitor,
    mutating: false,
    // Visits a given value. If mutating, will replace the value if necessary.
    acceptKey: function (node, name) {
        var value = this.accept(node[name]);
        if (this.mutating) {
            // Hacky sanity check: This may have a few false positives for type for the helper
            // methods but will generally do the right thing without a lot of overhead.
            if (value && !Visitor.prototype[value.type]) {
                throw new exception_1.default('Unexpected node type "' +
                    value.type +
                    '" found when accepting ' +
                    name +
                    ' on ' +
                    node.type);
            }
            node[name] = value;
        }
    },
    // Performs an accept operation with added sanity check to ensure
    // required keys are not removed.
    acceptRequired: function (node, name) {
        this.acceptKey(node, name);
        if (!node[name]) {
            throw new exception_1.default(node.type + ' requires ' + name);
        }
    },
    // Traverses a given array. If mutating, empty respnses will be removed
    // for child elements.
    acceptArray: function (array) {
        for (var i = 0, l = array.length; i < l; i++) {
            this.acceptKey(array, i);
            if (!array[i]) {
                array.splice(i, 1);
                i--;
                l--;
            }
        }
    },
    accept: function (object) {
        if (!object) {
            return;
        }
        /* istanbul ignore next: Sanity code */
        if (!this[object.type]) {
            throw new exception_1.default('Unknown type: ' + object.type, object);
        }
        if (this.current) {
            this.parents.unshift(this.current);
        }
        this.current = object;
        var ret = this[object.type](object);
        this.current = this.parents.shift();
        if (!this.mutating || ret) {
            return ret;
        }
        else if (ret !== false) {
            return object;
        }
    },
    Program: function (program) {
        this.acceptArray(program.body);
    },
    MustacheStatement: visitSubExpression,
    Decorator: visitSubExpression,
    BlockStatement: visitBlock,
    DecoratorBlock: visitBlock,
    PartialStatement: visitPartial,
    PartialBlockStatement: function (partial) {
        visitPartial.call(this, partial);
        this.acceptKey(partial, 'program');
    },
    ContentStatement: function ( /* content */) { },
    CommentStatement: function ( /* comment */) { },
    SubExpression: visitSubExpression,
    PathExpression: function ( /* path */) { },
    StringLiteral: function ( /* string */) { },
    NumberLiteral: function ( /* number */) { },
    BooleanLiteral: function ( /* bool */) { },
    UndefinedLiteral: function ( /* literal */) { },
    NullLiteral: function ( /* literal */) { },
    Hash: function (hash) {
        this.acceptArray(hash.pairs);
    },
    HashPair: function (pair) {
        this.acceptRequired(pair, 'value');
    }
};
function visitSubExpression(mustache) {
    this.acceptRequired(mustache, 'path');
    this.acceptArray(mustache.params);
    this.acceptKey(mustache, 'hash');
}
function visitBlock(block) {
    visitSubExpression.call(this, block);
    this.acceptKey(block, 'program');
    this.acceptKey(block, 'inverse');
}
function visitPartial(partial) {
    this.acceptRequired(partial, 'name');
    this.acceptArray(partial.params);
    this.acceptKey(partial, 'hash');
}
exports.default = Visitor;
//# sourceMappingURL=data:application/json;base64,{"version":3,"file":"visitor.js","sourceRoot":"","sources":["../../lib/visitor.js"],"names":[],"mappings":";;;;;AAAA,0DAAoC;AAEpC,SAAS,OAAO;IACd,IAAI,CAAC,OAAO,GAAG,EAAE,CAAC;AACpB,CAAC;AAED,OAAO,CAAC,SAAS,GAAG;IAClB,WAAW,EAAE,OAAO;IACpB,QAAQ,EAAE,KAAK;IAEf,0EAA0E;IAC1E,SAAS,EAAE,UAAS,IAAI,EAAE,IAAI;QAC5B,IAAI,KAAK,GAAG,IAAI,CAAC,MAAM,CAAC,IAAI,CAAC,IAAI,CAAC,CAAC,CAAC;QACpC,IAAI,IAAI,CAAC,QAAQ,EAAE;YACjB,kFAAkF;YAClF,2EAA2E;YAC3E,IAAI,KAAK,IAAI,CAAC,OAAO,CAAC,SAAS,CAAC,KAAK,CAAC,IAAI,CAAC,EAAE;gBAC3C,MAAM,IAAI,mBAAS,CACjB,wBAAwB;oBACtB,KAAK,CAAC,IAAI;oBACV,yBAAyB;oBACzB,IAAI;oBACJ,MAAM;oBACN,IAAI,CAAC,IAAI,CACZ,CAAC;aACH;YACD,IAAI,CAAC,IAAI,CAAC,GAAG,KAAK,CAAC;SACpB;IACH,CAAC;IAED,iEAAiE;IACjE,iCAAiC;IACjC,cAAc,EAAE,UAAS,IAAI,EAAE,IAAI;QACjC,IAAI,CAAC,SAAS,CAAC,IAAI,EAAE,IAAI,CAAC,CAAC;QAE3B,IAAI,CAAC,IAAI,CAAC,IAAI,CAAC,EAAE;YACf,MAAM,IAAI,mBAAS,CAAC,IAAI,CAAC,IAAI,GAAG,YAAY,GAAG,IAAI,CAAC,CAAC;SACtD;IACH,CAAC;IAED,uEAAuE;IACvE,sBAAsB;IACtB,WAAW,EAAE,UAAS,KAAK;QACzB,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,KAAK,CAAC,MAAM,EAAE,CAAC,GAAG,CAAC,EAAE,CAAC,EAAE,EAAE;YAC5C,IAAI,CAAC,SAAS,CAAC,KAAK,EAAE,CAAC,CAAC,CAAC;YAEzB,IAAI,CAAC,KAAK,CAAC,CAAC,CAAC,EAAE;gBACb,KAAK,CAAC,MAAM,CAAC,CAAC,EAAE,CAAC,CAAC,CAAC;gBACnB,CAAC,EAAE,CAAC;gBACJ,CAAC,EAAE,CAAC;aACL;SACF;IACH,CAAC;IAED,MAAM,EAAE,UAAS,MAAM;QACrB,IAAI,CAAC,MAAM,EAAE;YACX,OAAO;SACR;QAED,uCAAuC;QACvC,IAAI,CAAC,IAAI,CAAC,MAAM,CAAC,IAAI,CAAC,EAAE;YACtB,MAAM,IAAI,mBAAS,CAAC,gBAAgB,GAAG,MAAM,CAAC,IAAI,EAAE,MAAM,CAAC,CAAC;SAC7D;QAED,IAAI,IAAI,CAAC,OAAO,EAAE;YAChB,IAAI,CAAC,OAAO,CAAC,OAAO,CAAC,IAAI,CAAC,OAAO,CAAC,CAAC;SACpC;QACD,IAAI,CAAC,OAAO,GAAG,MAAM,CAAC;QAEtB,IAAI,GAAG,GAAG,IAAI,CAAC,MAAM,CAAC,IAAI,CAAC,CAAC,MAAM,CAAC,CAAC;QAEpC,IAAI,CAAC,OAAO,GAAG,IAAI,CAAC,OAAO,CAAC,KAAK,EAAE,CAAC;QAEpC,IAAI,CAAC,IAAI,CAAC,QAAQ,IAAI,GAAG,EAAE;YACzB,OAAO,GAAG,CAAC;SACZ;aAAM,IAAI,GAAG,KAAK,KAAK,EAAE;YACxB,OAAO,MAAM,CAAC;SACf;IACH,CAAC;IAED,OAAO,EAAE,UAAS,OAAO;QACvB,IAAI,CAAC,WAAW,CAAC,OAAO,CAAC,IAAI,CAAC,CAAC;IACjC,CAAC;IAED,iBAAiB,EAAE,kBAAkB;IACrC,SAAS,EAAE,kBAAkB;IAE7B,cAAc,EAAE,UAAU;IAC1B,cAAc,EAAE,UAAU;IAE1B,gBAAgB,EAAE,YAAY;IAC9B,qBAAqB,EAAE,UAAS,OAAO;QACrC,YAAY,CAAC,IAAI,CAAC,IAAI,EAAE,OAAO,CAAC,CAAC;QAEjC,IAAI,CAAC,SAAS,CAAC,OAAO,EAAE,SAAS,CAAC,CAAC;IACrC,CAAC;IAED,gBAAgB,EAAE,WAAS,aAAa,IAAG,CAAC;IAC5C,gBAAgB,EAAE,WAAS,aAAa,IAAG,CAAC;IAE5C,aAAa,EAAE,kBAAkB;IAEjC,cAAc,EAAE,WAAS,UAAU,IAAG,CAAC;IAEvC,aAAa,EAAE,WAAS,YAAY,IAAG,CAAC;IACxC,aAAa,EAAE,WAAS,YAAY,IAAG,CAAC;IACxC,cAAc,EAAE,WAAS,UAAU,IAAG,CAAC;IACvC,gBAAgB,EAAE,WAAS,aAAa,IAAG,CAAC;IAC5C,WAAW,EAAE,WAAS,aAAa,IAAG,CAAC;IAEvC,IAAI,EAAE,UAAS,IAAI;QACjB,IAAI,CAAC,WAAW,CAAC,IAAI,CAAC,KAAK,CAAC,CAAC;IAC/B,CAAC;IACD,QAAQ,EAAE,UAAS,IAAI;QACrB,IAAI,CAAC,cAAc,CAAC,IAAI,EAAE,OAAO,CAAC,CAAC;IACrC,CAAC;CACF,CAAC;AAEF,SAAS,kBAAkB,CAAC,QAAQ;IAClC,IAAI,CAAC,cAAc,CAAC,QAAQ,EAAE,MAAM,CAAC,CAAC;IACtC,IAAI,CAAC,WAAW,CAAC,QAAQ,CAAC,MAAM,CAAC,CAAC;IAClC,IAAI,CAAC,SAAS,CAAC,QAAQ,EAAE,MAAM,CAAC,CAAC;AACnC,CAAC;AACD,SAAS,UAAU,CAAC,KAAK;IACvB,kBAAkB,CAAC,IAAI,CAAC,IAAI,EAAE,KAAK,CAAC,CAAC;IAErC,IAAI,CAAC,SAAS,CAAC,KAAK,EAAE,SAAS,CAAC,CAAC;IACjC,IAAI,CAAC,SAAS,CAAC,KAAK,EAAE,SAAS,CAAC,CAAC;AACnC,CAAC;AACD,SAAS,YAAY,CAAC,OAAO;IAC3B,IAAI,CAAC,cAAc,CAAC,OAAO,EAAE,MAAM,CAAC,CAAC;IACrC,IAAI,CAAC,WAAW,CAAC,OAAO,CAAC,MAAM,CAAC,CAAC;IACjC,IAAI,CAAC,SAAS,CAAC,OAAO,EAAE,MAAM,CAAC,CAAC;AAClC,CAAC;AAED,kBAAe,OAAO,CAAC","sourcesContent":["import Exception from './exception';\n\nfunction Visitor() {\n  this.parents = [];\n}\n\nVisitor.prototype = {\n  constructor: Visitor,\n  mutating: false,\n\n  // Visits a given value. If mutating, will replace the value if necessary.\n  acceptKey: function(node, name) {\n    let value = this.accept(node[name]);\n    if (this.mutating) {\n      // Hacky sanity check: This may have a few false positives for type for the helper\n      // methods but will generally do the right thing without a lot of overhead.\n      if (value && !Visitor.prototype[value.type]) {\n        throw new Exception(\n          'Unexpected node type \"' +\n            value.type +\n            '\" found when accepting ' +\n            name +\n            ' on ' +\n            node.type\n        );\n      }\n      node[name] = value;\n    }\n  },\n\n  // Performs an accept operation with added sanity check to ensure\n  // required keys are not removed.\n  acceptRequired: function(node, name) {\n    this.acceptKey(node, name);\n\n    if (!node[name]) {\n      throw new Exception(node.type + ' requires ' + name);\n    }\n  },\n\n  // Traverses a given array. If mutating, empty respnses will be removed\n  // for child elements.\n  acceptArray: function(array) {\n    for (let i = 0, l = array.length; i < l; i++) {\n      this.acceptKey(array, i);\n\n      if (!array[i]) {\n        array.splice(i, 1);\n        i--;\n        l--;\n      }\n    }\n  },\n\n  accept: function(object) {\n    if (!object) {\n      return;\n    }\n\n    /* istanbul ignore next: Sanity code */\n    if (!this[object.type]) {\n      throw new Exception('Unknown type: ' + object.type, object);\n    }\n\n    if (this.current) {\n      this.parents.unshift(this.current);\n    }\n    this.current = object;\n\n    let ret = this[object.type](object);\n\n    this.current = this.parents.shift();\n\n    if (!this.mutating || ret) {\n      return ret;\n    } else if (ret !== false) {\n      return object;\n    }\n  },\n\n  Program: function(program) {\n    this.acceptArray(program.body);\n  },\n\n  MustacheStatement: visitSubExpression,\n  Decorator: visitSubExpression,\n\n  BlockStatement: visitBlock,\n  DecoratorBlock: visitBlock,\n\n  PartialStatement: visitPartial,\n  PartialBlockStatement: function(partial) {\n    visitPartial.call(this, partial);\n\n    this.acceptKey(partial, 'program');\n  },\n\n  ContentStatement: function(/* content */) {},\n  CommentStatement: function(/* comment */) {},\n\n  SubExpression: visitSubExpression,\n\n  PathExpression: function(/* path */) {},\n\n  StringLiteral: function(/* string */) {},\n  NumberLiteral: function(/* number */) {},\n  BooleanLiteral: function(/* bool */) {},\n  UndefinedLiteral: function(/* literal */) {},\n  NullLiteral: function(/* literal */) {},\n\n  Hash: function(hash) {\n    this.acceptArray(hash.pairs);\n  },\n  HashPair: function(pair) {\n    this.acceptRequired(pair, 'value');\n  }\n};\n\nfunction visitSubExpression(mustache) {\n  this.acceptRequired(mustache, 'path');\n  this.acceptArray(mustache.params);\n  this.acceptKey(mustache, 'hash');\n}\nfunction visitBlock(block) {\n  visitSubExpression.call(this, block);\n\n  this.acceptKey(block, 'program');\n  this.acceptKey(block, 'inverse');\n}\nfunction visitPartial(partial) {\n  this.acceptRequired(partial, 'name');\n  this.acceptArray(partial.params);\n  this.acceptKey(partial, 'hash');\n}\n\nexport default Visitor;\n"]}