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What is Compass?

👉 Compass is a library designed to work with URLs and hard disk file paths. It includes tools to simplify manipulation of this data. The goal of the library is to facilitate working with URLs and data on file locations.

General Information

Compass can be used in various PHP applications to process file paths and URLs. It includes two main components: Compass\Path and Compass\Url. Both of these components are separate objects and offer a set of methods for simple data manipulation. Compass\Path provides tools for working with directories, including finding, replacing, and checking for directories in a path string, as well as changing their order. In turn, Compass\Url provides capabilities for working with URLs, allowing you to create, retrieve, and modify various parts of a URL.

Both components operate on a similar principle, first collecting the necessary parameters and then applying them to the result using a special updateSource() method.

Install

To install with composer:

Requires PHP 8.0 or newer.

URL Component

🚀 Quick Start

Creating An Instance Of The Compass\Url Class

The Compass\Url class can be instantiated by calling the static createBlank() method or by using the new operator. The createBlank method is notable for its use of cloning its own prototype. This method has two optional parameters: $isIdnToAscii and $updateStrategy, which determine whether the host should be converted to punycode and what URL update strategy should be used.

The first parameter, $isIdnToAscii, determines whether the host should be converted. If it is set to true, the host is converted, and if it is false, no conversion of the host occurs.

The second parameter, $updateStrategy, determines the URL update strategy. The strategy involves methods for creating the components of the URL.

To create a new instance of the Compass\Url class using the new operator, one must pass one required parameter - the original URL as a string.

Methods For Generating URLs

Parameters can be set using:

• the constructor
• the setSource method
• the setAll method
• methods specific to a particular part of the URL (as shown in the quick start).

⚡ Examples

👉 Through the constructor

👉 Using the setSource method

👉 Using the setAll method

👉 Using methods responsible for a specific part of Url.

In the first two options the suffix is not recognized. In such cases, the suffix must be set using a separate $url->setSuffix(.json); method, this is the only way you can manage it.

❗ The suffix is not parsed since it could be any string and does not have to start with a dot. If you pass a URL with a suffix, it becomes part of the path.

Applying Changes

For the changed parameters to take effect, you must call the $url->updateSource() method. This method has two optional arguments - $updateAbsoluteUrl and $suffix. The value of the $updateAbsoluteUrl argument determines whether the entire URL will be updated or just a relative portion of it. By default its value is true, in other words, by default it will try to update the entire URL. The $suffix parameter is of type string and allows you to set the suffix at the time of update.

After the parameters have been applied, you can get the updated result using the $url->getSource() method.

Upgrade Strategies

📢 An update strategy is an object that combines all inputs to create a final URL. This object must be an implementation of the Compass\UrlStrategy interface. In the system, the class that performs this function is called Compass\DefaultUrlStrategy.

The strategy was invented in order to control the URL creation process. It contains a set of methods, one for each section of the URL where parameters are concatenated. Which methods will participate in the update are determined in the Compass\Url object based on the states of the sections. There are some flags that indicate which areas need to be recreated. To make it easier to understand, we can draw an analogy with a road divided into a certain number of sections “A”, “B”, “C”, “D” and the road company that is responsible for it. Ideally, the road should always be smooth. When a section of the road, such as "C", is damaged, a repair team goes to that section and repairs it. You can also imagine a URL, where the road is a string that has logical parts - sections. Repair teams are methods in the renewal strategy. The road company is a Compass\Url object.

The strategy has six methods in which parts of the URL are created:

• updateAuthority()
• updateBaseUrl()
• updateQuery()
• updatePath()
• updateRelativeUrl()
• updateAbsoluteUrl().

By setting any parameter for a URL, the system changes the state of the section, as if damaging the section for which the parameter was passed. After calling the $url->updateSource(); method Appropriate strategy methods are included in the work.

❗ It is important to remember that the Compass\Url object stores the initial parts that the user installed and the results of each strategy method.

The implementation of methods can be divided into three levels.

The third level method updateAbsoluteUrl() is always executed; it combines the saved results of the second level methods. The second level methods updateBaseUrl() and updateRelativeUrl() combine the results of the first level. At the first level, updateAuthority(), updatePath() and updateQuery() glue the original parts together in their own scope.

State Manipulation

States are stored in several fields of the Compass\Url class: $authoritySate, $relativeUrlState and $schemeState. $authoritySate and $relativeUrlState are of type int, $schemeState is of type bool. The $authoritySate and $relativeUrlState states are controlled by bit operations. Here is a code example that shows their default values when the state is intact:

If we want to corrupt the state of $relativeUrlState in the query region, we can use bitwise operators:

The remaining sections can be manipulated in a similar way, with the exception of $schemeState, which needs to be assigned a boolean value.

⚡ An Example Of Creating Your Own Strategy

When building your URL update process, sometimes you want a method to be executed that, based on the current state, will not be executed. In such cases, the additional method forceUnlockMethod(...) is used, in which you can change the current state of a certain section, thereby forcing the system to execute the desired method.

This is better understood with an example. Let's imagine that we need to generate URLs for referral links. Let’s create a strategy that will add a refid parameter equal to 40 for all URLs with the another.site domain.

Strategy code:

Now let's set the strategy and output two URLs, one of which will be the destination, with the domain another.site:

At first glance, it might seem that the state change ($relativeUrlState &= ~Url::QUERY_STATE;) should have been written inside the if construct, but this is not the case. After we installed the vinograd.soft host, calling the updateSource() method would not lead to the execution of the updateQuery method of our strategy, since not a single parameter was added in the normal way that could change the state of this section. As a result, the state would remain intact, only the baseurl section would be updated and the saved refid=40 parameter from the last time would be merged with the new baseurl which contains the vinograd.soft host.

This example shows that you are not limited to just the standard methods of setting URL parts. Using strategies, you can post-process the result, for example, when you need to escape the result for HTML attributes containing URLs (href, src and other attributes of this type).

PATH Component

👉 Compass\Path can be described as an object representation of a file path. It operates on the path string without relying on the actual file system. The component, like Compass\Url, has an update strategy, which includes one updatePath() method. It's important to note that this component is stateless.

🚀 Demonstration Of Methods

Testing

Contributing

Please see CONTRIBUTING for details.

License

The MIT License (MIT). Please see License File for more information.