@jsonhero/parser/lib/index.mjs

A parser that walks through a JSON file and for each value determines the path to it, the type and paths to any children. It also builds a model of the structure of the data.

import { JSONHeroPath } from '@jsonhero/path';
import { inferType } from '@jsonhero/json-infer-types';

function friendlyName(name) {
    name = snakeCase(name);
    name = dashCase(name);
    name = camelCase(name);
    name = toTitleCase(name);
    return name;
}
function camelCase(name) {
    return (name
        // insert a space before all caps
        .replace(/(\w)([A-Z])/g, '$1 $2'));
}
function snakeCase(name) {
    return (name
        // insert a space before all caps
        .replace(/(_)/g, ' '));
}
function dashCase(name) {
    return (name
        // insert a space before all caps
        .replace(/(-)/g, ' '));
}
function toTitleCase(name) {
    return (name
        //after every space
        .replace(/ ([a-z])/g, function (str) {
        return str.toUpperCase();
    })
        //first character
        .replace(/^./, function (str) {
        return str.toUpperCase();
    }));
}

function parse(object) {
    var rootPath = '$';
    var parsedObject = {
        values: {
            rootPath: rootPath,
            values: {},
        },
        structure: {
            rootPath: rootPath,
            values: {},
        },
    };
    buildValueTree(object, rootPath, 'Root', parsedObject.values.values);
    return parsedObject;
}
function buildValueTree(object, path, name, valueCollection) {
    var valueInfo = {
        path: path,
        name: name,
        displayName: friendlyName(name),
        value: object,
        type: inferType(object),
        children: null,
    };
    valueCollection[path] = valueInfo;
    //for any children add to children and then recursively run this
    if (isCollection(valueInfo.type)) {
        var parentPath = new JSONHeroPath(path);
        valueInfo.children = [];
        for (var key in object) {
            var child = object[key];
            var childPath = parentPath.child(key).toString();
            valueInfo.children.push(childPath);
            var childName = key;
            if (valueInfo.type.name === 'array') {
                childName = "".concat(name, " ").concat(key);
            }
            buildValueTree(child, childPath, childName, valueCollection);
        }
    }
}
function isCollection(type) {
    return type.name === 'array' || type.name === 'object';
}

export { parse };