url-template.js

// Based on https://github.com/bramstein/url-template, licensed under BSD
// TODO: create separate package.
//
// Copyright (c) 2012-2014, Bram Stein
// All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//  1. Redistributions of source code must retain the above copyright
//     notice, this list of conditions and the following disclaimer.
//  2. Redistributions in binary form must reproduce the above copyright
//     notice, this list of conditions and the following disclaimer in the
//     documentation and/or other materials provided with the distribution.
//  3. The name of the author may not be used to endorse or promote products
//     derived from this software without specific prior written permission.
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
// EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
// EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
/* istanbul ignore file */
function encodeReserved(str) {
    return str
        .split(/(%[0-9A-Fa-f]{2})/g)
        .map(function (part) {
        if (!/%[0-9A-Fa-f]/.test(part)) {
            part = encodeURI(part).replace(/%5B/g, "[").replace(/%5D/g, "]");
        }
        return part;
    })
        .join("");
}
function encodeUnreserved(str) {
    return encodeURIComponent(str).replace(/[!'()*]/g, function (c) {
        return "%" + c.charCodeAt(0).toString(16).toUpperCase();
    });
}
function encodeValue(operator, value, key) {
    value =
        operator === "+" || operator === "#"
            ? encodeReserved(value)
            : encodeUnreserved(value);
    if (key) {
        return encodeUnreserved(key) + "=" + value;
    }
    else {
        return value;
    }
}
function isDefined(value) {
    return value !== undefined && value !== null;
}
function isKeyOperator(operator) {
    return operator === ";" || operator === "&" || operator === "?";
}
function getValues(context, operator, key, modifier) {
    var value = context[key], result = [];
    if (isDefined(value) && value !== "") {
        if (typeof value === "string" ||
            typeof value === "number" ||
            typeof value === "boolean") {
            value = value.toString();
            if (modifier && modifier !== "*") {
                value = value.substring(0, parseInt(modifier, 10));
            }
            result.push(encodeValue(operator, value, isKeyOperator(operator) ? key : ""));
        }
        else {
            if (modifier === "*") {
                if (Array.isArray(value)) {
                    value.filter(isDefined).forEach(function (value) {
                        result.push(encodeValue(operator, value, isKeyOperator(operator) ? key : ""));
                    });
                }
                else {
                    Object.keys(value).forEach(function (k) {
                        if (isDefined(value[k])) {
                            result.push(encodeValue(operator, value[k], k));
                        }
                    });
                }
            }
            else {
                const tmp = [];
                if (Array.isArray(value)) {
                    value.filter(isDefined).forEach(function (value) {
                        tmp.push(encodeValue(operator, value));
                    });
                }
                else {
                    Object.keys(value).forEach(function (k) {
                        if (isDefined(value[k])) {
                            tmp.push(encodeUnreserved(k));
                            tmp.push(encodeValue(operator, value[k].toString()));
                        }
                    });
                }
                if (isKeyOperator(operator)) {
                    result.push(encodeUnreserved(key) + "=" + tmp.join(","));
                }
                else if (tmp.length !== 0) {
                    result.push(tmp.join(","));
                }
            }
        }
    }
    else {
        if (operator === ";") {
            if (isDefined(value)) {
                result.push(encodeUnreserved(key));
            }
        }
        else if (value === "" && (operator === "&" || operator === "?")) {
            result.push(encodeUnreserved(key) + "=");
        }
        else if (value === "") {
            result.push("");
        }
    }
    return result;
}
export function parseUrl(template) {
    return {
        expand: expand.bind(null, template),
    };
}
function expand(template, context) {
    var operators = ["+", "#", ".", "/", ";", "?", "&"];
    return template.replace(/\{([^\{\}]+)\}|([^\{\}]+)/g, function (_, expression, literal) {
        if (expression) {
            let operator = "";
            const values = [];
            if (operators.indexOf(expression.charAt(0)) !== -1) {
                operator = expression.charAt(0);
                expression = expression.substr(1);
            }
            expression.split(/,/g).forEach(function (variable) {
                var tmp = /([^:\*]*)(?::(\d+)|(\*))?/.exec(variable);
                values.push(getValues(context, operator, tmp[1], tmp[2] || tmp[3]));
            });
            if (operator && operator !== "+") {
                var separator = ",";
                if (operator === "?") {
                    separator = "&";
                }
                else if (operator !== "#") {
                    separator = operator;
                }
                return (values.length !== 0 ? operator : "") + values.join(separator);
            }
            else {
                return values.join(",");
            }
        }
        else {
            return encodeReserved(literal);
        }
    });
}