Hack book of Hoa\Protocol
Unfortunately, the documentation of this library has not
been written yet. However, the README.md
file may contain
enough information to help you. This document is an extract of the
README.md
file.
Sorry for this inconvenience. Be ensured we are working hard to fix
this.
This library provides the hoa://
protocol, which is a way to abstract resource
accesses.
Quick usage
We propose a quick overview of how to list the current tree of the protocol, how
to resolve a hoa://
path and finally how to add a new node in this tree.
Explore resources
First of all, to get the instance of the hoa://
protocol, you should use the
static getInstance
method on the Hoa\Protocol\Protocol
class which
represents the root of the protocol tree:
echo Hoa\Protocol\Protocol::getInstance();
/**
* Might output:
* Application
* Public
* Data
* Etc
* Configuration
* Locale
* Lost+found
* Temporary
* Variable
* Cache
* Database
* Log
* Private
* Run
* Test
* Library
*/
We see that there is 3 “sub-roots”:
-
Application
, representing resources of the application, like public files (in thePublic
node), models, resources… everything related to the application, -
Data
, representing data required by the application, like configuration files, locales, databases, tests etc. -
Library
, representing all Hoa's libraries.
Thus, hoa://Library/Protocol/README.md
represents the abstract path to this
real file. No matter where you are on the disk, this path will always be valid
and pointing to this file. This becomes useful in an application where you would
like to access to a configuration file like this
hoa://Data/Etc/Configuration/Foo.php
: Maybe the Data
directory does not
exist, maybe the Etc
or Configuration
directories do not exist neither, but
each node of the hoa://
tree resolves to a valid directory which contains your
Foo.php
configuration file. This is an abstract path for a resource.
Resolving a path
We can either resolve a path by using the global resolve
function or the
Hoa\Protocol\Protocol::resolve
method:
var_dump(
resolve('hoa://Library/Protocol/README.md')
);
/**
* Might output:
* string(37) "/usr/local/lib/Hoa/Protocol/README.md"
*/
Register new nodes in the tree
The hoa://
protocol is a tree. Thus, to add a new “component”/“directory” in
this tree, we must create a node and register it as a child of an existing node.
Thus, in the following example we will create a Usb
node, pointing to the
/Volumes
directory, and we will add it as a new sub-root, so an immediate
child of the root:
$protocol = Hoa\Protocol\Protocol::getInstance();
$protocol[] = new Hoa\Protocol\Node('Usb', '/Volumes/');
Here we are. Now, resolving hoa://Usb/StickA
might point to /Volumes/StickA
(if exists):
var_dump(
resolve('hoa://Usb/StickA')
);
/**
* Might output:
* string(15) "/Volumes/StickA"
*/
An error or a suggestion about the documentation? Contributions are welcome!