expand-value/dist/compile.js

Get deeply nested values from an object, like dot-prop and get-value, but with support for advanced features like bracket-notation and more.

"use strict";
var __create = Object.create;
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __getProtoOf = Object.getPrototypeOf;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __name = (target, value) => __defProp(target, "name", { value, configurable: true });
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toESM = (mod, isNodeMode, target) => (target = mod != null ? __create(__getProtoOf(mod)) : {}, __copyProps(
  // If the importer is in node compatibility mode or this is not an ESM
  // file that has been converted to a CommonJS file using a Babel-
  // compatible transform (i.e. "__esModule" has not been set), then set
  // "default" to the CommonJS "module.exports" for node compatibility.
  isNodeMode || !mod || !mod.__esModule ? __defProp(target, "default", { value: mod, enumerable: true }) : target,
  mod
));
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);

// src/compile.ts
var compile_exports = {};
__export(compile_exports, {
  compile: () => compile,
  default: () => compile_default
});
module.exports = __toCommonJS(compile_exports);

// src/utils.ts
var import_is_number = __toESM(require("is-number"));
var import_intl_segmenter = require("intl-segmenter");
var { defineProperty } = Reflect;
var isObject = /* @__PURE__ */ __name((val) => val && typeof val === "object" && !Array.isArray(val), "isObject");
var unquote = /* @__PURE__ */ __name((str) => {
  if (!str) return "";
  return str.replace(/^['"`]|['"`]$/g, "");
}, "unquote");
var define = /* @__PURE__ */ __name((node, key, value) => {
  defineProperty(node, key, {
    configurable: true,
    enumerable: false,
    writable: true,
    value
  });
}, "define");
var size = /* @__PURE__ */ __name((value) => {
  if (value == null) return 0;
  if ((0, import_is_number.default)(value)) return String(value).length;
  if (isObject(value)) return Object.keys(value).length;
  if (typeof value.length === "number") return value.length;
  if (typeof value.size === "number") return value.size;
  return null;
}, "size");
var isValidObject = /* @__PURE__ */ __name((val) => {
  return isObject(val) || Array.isArray(val) || typeof val === "function";
}, "isValidObject");
var isSafeKey = /* @__PURE__ */ __name((key) => {
  return key !== "__proto__" && key !== "constructor" && key !== "prototype";
}, "isSafeKey");
var isValid = /* @__PURE__ */ __name((key, data, options) => {
  if (!isSafeKey(key)) {
    return false;
  }
  if (typeof options.isValid === "function") {
    return options.isValid(key, data);
  }
  return true;
}, "isValid");
var findSafeBreakPoint = /* @__PURE__ */ __name((input) => {
  for (let i = input.length - 1; i >= 0; i--) {
    if (/\s/.test(input[i]) || /^[\x20-\x7E]$/.test(input[i])) {
      return i + 1;
    }
  }
  return input.length;
}, "findSafeBreakPoint");
var getSegments = /* @__PURE__ */ __name((input, language = "en", granularity) => {
  const segmenter = new import_intl_segmenter.Segmenter(language, { granularity, localeMatcher: "best fit" });
  return Array.from(segmenter.segment(input)).map((segment) => segment.segment);
}, "getSegments");
var getGraphemes = /* @__PURE__ */ __name((input, language = "en", maxChunkLength = 500) => {
  const graphemes = [];
  let position = 0;
  while (position < input.length) {
    const remainingText = input.slice(position);
    const chunkSize = Math.min(maxChunkLength, remainingText.length);
    const potentialChunk = remainingText.slice(0, chunkSize);
    const breakPoint = findSafeBreakPoint(potentialChunk);
    const chunk = potentialChunk.slice(0, breakPoint);
    const chunkSegments = getSegments(chunk, language, "grapheme");
    graphemes.push(...chunkSegments);
    position += breakPoint;
  }
  return graphemes;
}, "getGraphemes");

// src/nodes/Location.ts
var Position = class {
  static {
    __name(this, "Position");
  }
  index;
  line;
  col;
  constructor(loc) {
    this.index = loc.index;
    this.line = loc.line;
    this.col = loc.col;
  }
};
var Location = class {
  static {
    __name(this, "Location");
  }
  start;
  end;
  constructor(start, end) {
    this.start = start;
    this.end = end;
  }
  slice(input) {
    return input.slice(...this.range);
  }
  get range() {
    return [this.start.index, this.end.index];
  }
  get lines() {
    return [this.start.line, this.end.line];
  }
};
var location = /* @__PURE__ */ __name((loc) => {
  const start = new Position(loc);
  return (node) => {
    node.loc = new Location(start, new Position(loc));
    return node;
  };
}, "location");
location.Position = Position;
location.Location = Location;
location.location = location;

// src/nodes/Node.ts
var Node = class {
  static {
    __name(this, "Node");
  }
  type;
  value;
  output;
  symbol;
  parent;
  constructor(node) {
    this.type = node.type;
    this.value = node.value || "";
    if (node.output != null && node.output !== "") {
      this.output = node.output;
    }
    if (node.symbol) {
      this.symbol = node.symbol;
    }
    define(this, "alt", node.alt);
    define(this, "match", node.match);
    define(this, "loc", node.loc);
  }
  get siblings() {
    return this.parent?.nodes || [];
  }
};

// src/nodes/Block.ts
var Block = class extends Node {
  static {
    __name(this, "Block");
  }
  nodes;
  constructor(node) {
    super(node);
    this.nodes = node.nodes || [];
  }
  append(input) {
    this.parent && this.parent.append(input);
    this.output = this.output || "";
    this.output += input;
  }
  push(node) {
    define(node, "parent", this);
    this.nodes.push(node);
  }
};

// src/nodes/Token.ts
var { defineProperty: defineProperty2 } = Reflect;
var Token = class {
  static {
    __name(this, "Token");
  }
  type;
  value;
  loc;
  match;
  constructor(token) {
    this.type = token.type;
    this.value = token.value;
    defineProperty2(this, "loc", { value: token.loc, writable: true });
    defineProperty2(this, "match", { value: token.match });
  }
};

// src/parse.ts
var QUOTED_STRING = /^(['"`])((?:\\.|(?!\1)[\s\S])*?)(\1)/;
var IDENT_DOT = /^([a-zA-Z_][-a-zA-Z0-9_.]*(?<!\.))/;
var IDENT = /^([a-zA-Z_$][a-zA-Z0-9_$-]*(?<!-))/;
var NUMBER = /^(-?[0-9]+(?:\.[0-9]+)?|-?Infinity|NaN)/;
var RANGE = /^\.\.(?=[0-9a-z])/i;
var SYMBOL = /^Symbol\((.*?)\)/;
var parse = /* @__PURE__ */ __name((input = "", options = {}) => {
  if (!isObject(options)) options = {};
  const loc = { index: 0, line: 1, col: 0, row: 1 };
  let pos = location(loc);
  const str = String(input);
  const ast = new Block({ type: "root" });
  ast.output = "";
  const stack = [ast];
  const stash = [];
  const tokens = [];
  let remaining = str;
  let block = ast;
  let token;
  let match;
  let prev;
  let separator = /^\./;
  let IDENTITY = IDENT;
  if (typeof options.separator === "string") {
    separator = new RegExp(`^\\${options.separator.replace(/^[\\^]+/, "")}`);
    IDENTITY = IDENT_DOT;
  }
  const eos = /* @__PURE__ */ __name(() => remaining === void 0 || remaining === "", "eos");
  const scan = /* @__PURE__ */ __name((regex, type = "text") => {
    if (match = regex.exec(remaining)) {
      consume(match[0]);
      return new Token({ type, value: match[0], match });
    }
  }, "scan");
  const updateLocation = /* @__PURE__ */ __name((value, len) => {
    const i = value.lastIndexOf("\n");
    loc.index += len;
    loc.col = ~i ? len - i : loc.col + len;
    loc.row += Math.max(0, value.split("\n").length - 1);
  }, "updateLocation");
  const consume = /* @__PURE__ */ __name((value, len = value.length) => {
    updateLocation(value, len);
    remaining = remaining.slice(len);
    return value;
  }, "consume");
  const drop = /* @__PURE__ */ __name(() => {
    if (stash.length) {
      block.push(stash.shift());
    }
  }, "drop");
  const shouldPush = /* @__PURE__ */ __name((node) => {
    return node.type !== "newline" || options.newlines !== false;
  }, "shouldPush");
  const push = /* @__PURE__ */ __name((node) => {
    pos(node);
    if (prev?.type === "ident" && node.type === "ident") {
      block.append(node.output || node.match[0]);
      prev.value += node.value;
      return;
    }
    if (!shouldPush(node)) return;
    block.push(node);
    if (node.nodes) {
      stack.push(node);
      block = node;
    } else {
      block.append(node.output || node.match[0]);
      tokens.push(node);
    }
    pos = location(loc);
    prev = node;
    if (block.type === "root") {
      drop();
    }
  }, "push");
  const pop = /* @__PURE__ */ __name(() => {
    const parent = stack.pop();
    block = stack[stack.length - 1];
    return parent;
  }, "pop");
  const advance = /* @__PURE__ */ __name(() => {
    if (token = scan(/^\\+/, "escaped")) {
      if (token.value.length % 2 === 1) {
        token.value += consume(remaining[0]);
      }
      if (token.value === "\\.") {
        token.type = "ident";
        token.value = ".";
        token.output = "\\.";
      }
      push(new Node(token));
      return;
    }
    if (token = scan(SYMBOL, "symbol")) {
      token.value = token.match[1];
      token.symbol = Symbol.for(token.value);
      push(new Node(token));
      return;
    }
    if (token = scan(/^\[/, "left_bracket")) {
      token.index = tokens.length;
      push(new Block({ type: "bracket" }));
      push(new Node(token));
      return;
    }
    if (token = scan(/^\]/, "right_bracket")) {
      push(new Node(token));
      if (block.type === "bracket") {
        pop();
      }
      return;
    }
    if (token = scan(/^\(/, "left_paren")) {
      token.index = tokens.length;
      push(new Block({ type: "paren" }));
      push(new Node(token));
      return;
    }
    if (token = scan(/^\)/, "right_paren")) {
      push(new Node(token));
      if (block.type === "paren") {
        pop();
      }
      return;
    }
    if (block.type === "bracket" && (token = scan(RANGE, "range"))) {
      push(new Node(token));
      return;
    }
    if (!options.separator && (token = scan(separator, "separator"))) {
      push(new Node(token));
      return;
    }
    if (token = scan(/^[0-9]+/, "integer")) {
      push(new Node(token));
      return;
    }
    if (token = scan(IDENTITY, "ident")) {
      push(new Node(token));
      return;
    }
    if (options.separator && options.separator !== ".") {
      if (token = scan(separator, "separator")) {
        push(new Node(token));
        return;
      }
    }
    if (token = scan(QUOTED_STRING, "quoted")) {
      push(new Node(token));
      return;
    }
    if (token = scan(NUMBER, "number")) {
      if (token.value === "-0") {
        token.alt = "0";
      }
      push(new Node(token));
      return;
    }
    push(new Node(scan(/^(.)/, "text")));
  }, "advance");
  while (!eos()) advance();
  return { ast, tokens, output: ast.output };
}, "parse");

// src/expand.ts
var METHOD_REGEX = /(\[[^[\]]+?\]|\.(?:blank|empty|first|last|length|nil|size)(\.|$))/;
var expand = /* @__PURE__ */ __name((data, path, options = {}) => {
  if (!isObject(options)) {
    options = { default: options };
  }
  const fallback = options.default !== void 0 ? options.default : options.fallback;
  const helpers = options.helpers;
  if (data && typeof path === "string") {
    if (path.startsWith("[") && path.endsWith("]") && !path.slice(1).includes("[")) {
      const prop = path.slice(1, -1);
      if (data[prop] !== void 0 && isValid(prop, data, options)) {
        return data[prop];
      }
    }
    if (data[path] !== void 0 && isValid(path, data, options)) {
      return data[path];
    }
  }
  if ((typeof path === "symbol" || typeof path === "number") && isValid(path, data, options)) {
    return data[path];
  }
  if (typeof path !== "string" && !Array.isArray(path)) {
    return data;
  }
  if (!isValidObject(data)) {
    return fallback;
  }
  if (path in data && isValid(path, data, options)) {
    return data[path];
  }
  if ((Array.isArray(path) || !METHOD_REGEX.test(path)) && !options.separator) {
    const segs = Array.isArray(path) ? path : path.split(/(?<!\\)\.(?!$)/);
    let ctx = data;
    let prev = ctx;
    let i = 0;
    if (segs.length === 0) {
      return fallback;
    }
    for (; i < segs.length; i++) {
      if (ctx === void 0) {
        return fallback;
      }
      let key = String(segs[i]).replace(/\\(.)/g, "$1");
      const helper = helpers?.[key];
      if (!isValidObject(ctx)) {
        if (!helper) {
          return fallback;
        }
        ctx = helper(ctx);
        continue;
      }
      if (options.onResolve) {
        options.onResolve(ctx, key);
      }
      if (Array.isArray(ctx) || typeof ctx === "string") {
        const index = Number(key);
        if (!Number.isNaN(index)) {
          key = index;
        }
      } else if (key === "-0") {
        key = -0;
      } else if (key === "NaN") {
        key = NaN;
      } else if (key === "Infinity" || key === "-Infinity") {
        key = Number(key);
      }
      if (!isValid(key, ctx, options)) {
        return fallback;
      }
      let val = ctx[key];
      if (val === void 0 && helper) {
        val = helper(ctx);
      }
      if (val !== void 0) {
        if (!isValid(key, ctx, options)) {
          return fallback;
        }
        prev = ctx;
        ctx = val;
        continue;
      }
      let temp = ctx;
      let next = segs[i + 1];
      let found = false;
      while (next) {
        i++;
        key += `.${next}`;
        if (!isValid(key, ctx, options)) {
          return fallback;
        }
        temp = ctx[key];
        next = segs[i + 1];
        if (temp !== void 0) {
          prev = ctx;
          ctx = temp;
          found = true;
          break;
        }
      }
      if (!found) {
        prev = ctx;
        ctx = fallback;
        break;
      }
    }
    if (i < segs.length) {
      if (options.strict === true && fallback === void 0) {
        throw new Error(`Variable is undefined: "${segs[i - 1]}"`);
      }
      return fallback;
    }
    if (typeof ctx === "function" && isObject(prev)) {
      ctx.context = prev;
    }
    return ctx;
  }
  const { ast } = parse(path, options);
  const output = compile(ast, data, options);
  if (output === void 0) {
    return fallback;
  }
  return output;
}, "expand");
expand.parse = parse;
expand.compile = compile;

// src/helpers.ts
var helpers_exports = {};
__export(helpers_exports, {
  first: () => first,
  last: () => last,
  length: () => length,
  size: () => size2
});
var first = /* @__PURE__ */ __name((value) => {
  if (!value) return;
  if (value instanceof Set || value instanceof Map) {
    value = [...value];
  }
  if (isObject(value)) {
    return typeof value.first === "function" ? value.first() : value.first;
  }
  if (Array.isArray(value)) {
    return value[0];
  }
  if (typeof value === "string") {
    const graphemes = getGraphemes(value.slice(0, 20));
    return graphemes[0];
  }
  return value[0];
}, "first");
var last = /* @__PURE__ */ __name((value) => {
  if (!value) return;
  if (value instanceof Set || value instanceof Map) {
    value = [...value];
  }
  if (isObject(value)) {
    return typeof value.last === "function" ? value.last() : value.last;
  }
  if (Array.isArray(value)) {
    return value[value.length - 1];
  }
  if (typeof value === "string") {
    const graphemes = getGraphemes(value.slice(-20));
    return graphemes[graphemes.length - 1];
  }
  return value[value.length - 1];
}, "last");
var length = /* @__PURE__ */ __name((value) => {
  if (typeof value?.length === "number") {
    return value.length;
  }
  if (typeof value?.size === "number") {
    return value.size;
  }
  return size2(value);
}, "length");
var size2 = /* @__PURE__ */ __name((value) => {
  if (value === null) {
    return 1;
  }
  if (typeof value?.size === "number") {
    return value.size;
  }
  if (typeof value?.length === "number") {
    return value.length;
  }
  return size(value);
}, "size");

// src/compile.ts
var compile = /* @__PURE__ */ __name((ast, data = {}, options = {}) => {
  const orig = { ...data };
  let context = orig;
  let prev = context;
  const fns = options.helpers ? { ...helpers_exports, ...options.helpers } : helpers_exports;
  const resolve = /* @__PURE__ */ __name((node) => {
    if (node.skip || node.type === "separator") {
      return;
    }
    if (context === void 0) {
      return;
    }
    if (node.type === "paren") {
      const args = [];
      for (let i = 1; i < node.nodes.length - 1; i++) {
        const child = node.nodes[i];
        switch (child.type) {
          case "integer":
            args.push(Number(child.value));
            break;
          case "quoted":
            args.push(unquote(child.value));
            break;
          case "symbol":
            args.push(Symbol.for(child.value));
            break;
          case "ident":
            args.push(expand(context, child.value));
            break;
          default: {
            break;
          }
        }
      }
      context = `(${args.join("..")})`;
      return;
    }
    if (node.nodes) {
      node.nodes.forEach((child) => resolve(child));
      return;
    }
    if (node.type === "symbol") {
      prev = context;
      for (const symbol2 of Object.getOwnPropertySymbols(context)) {
        if (symbol2 === node.symbol || symbol2.toString() === node.symbol.toString()) {
          context = context[symbol2];
          return;
        }
      }
      const symbol = node.symbol || Symbol.for(node.value);
      context = context[symbol];
      return;
    }
    if (node.type === "ident") {
      if (!isSafeKey(node.value)) {
        context = void 0;
        return;
      }
      let value = node.value;
      if (node.parent?.type === "bracket") {
        let temp = orig;
        value = expand(temp, value);
        if (isObject(value)) {
          const sibs = node.siblings.filter((n) => ["ident", "quoted", "symbol"].includes(n.type));
          let index = sibs.indexOf(node) + 1;
          let next = sibs[index];
          while (isObject(value) && isObject(next) && temp) {
            const key = next.value;
            value = expand(value, key);
            next.skip = true;
            temp = expand(temp, value);
            next = sibs[++index];
          }
        }
      }
      prev = context;
      if (context?.[value] !== void 0) {
        context = context[value];
        if (typeof context === "function") {
          context = context.call(prev);
        }
        return;
      }
      const helper = fns[value];
      if (typeof helper === "function") {
        context = helper(context);
      }
      if (context === void 0 && options.strict === true) {
        throw new Error(`Variable is undefined: "${node.value}"`);
      }
      return;
    }
    if (node.type === "integer" || node.type === "number") {
      if (node.parent.type === "bracket") {
        const index = node.parent.nodes.indexOf(node);
        const next = node.parent.nodes[index + 1];
        const after = node.parent.nodes[index + 2];
        if (next?.type === "range" && (after?.type === "integer" || after?.type === "number")) {
          next.skip = true;
          after.skip = true;
          const start = Number(node.value);
          const end = Number(after.value);
          const range = Array.from({ length: end - start + 1 }, (_, i) => start + i);
          context = range.map((i) => context[i]);
          return;
        }
      }
      prev = context;
      context = context[Number(node.value)];
      return;
    }
    if (node.type === "quoted") {
      prev = context;
      context = context[node.match[2]];
    }
  }, "resolve");
  resolve(ast);
  if (typeof context === "function") {
    context.context = prev;
  }
  if (ast.nodes?.length > 0 && context === orig) {
    return void 0;
  }
  return context;
}, "compile");
var compile_default = compile;
// Annotate the CommonJS export names for ESM import in node:
0 && (module.exports = {
  compile
});
//# sourceMappingURL=compile.js.map