initial commit of the impressum plugin

plugin to provide additional information about the site owner
and contact possibilities that will be displayed at the /friendika
page. admin interface is implemented.

addon/impressum/README

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+Impressum Plugin for Friendika
+
+Author: Tobias Diekershoff
+        tobias.diekershoff@gmx.net
+
+License: 3-clause BSD license (same as Friendika)
+
+About
+  This plugin adds an Impressum block to the /friendika page with informations
+  about the page operator/owner and how to countact you in case of any questions.
+
+  In the notes and postal fields you can use HTML tags for formatting.
+
+Configuration:
+  For configuration you can set the following variables in the .htconfig file
+   * $a->config['impressum']['owner']           this is the Name of the Operator
+   * $a->config['impressum']['ownerprofile']    this is an optional Friendika account
+                                                where the above owner name will link to
+   * $a->config['impressum']['email']           a contact email address (optional)
+                                                will be displayed slightly obfuscated
+                                                as name(at)example(dot)com
+   * $a->config['impressum']['postal']          should contain a postal address where
+                                                you can be reached at (optional)
+   * $a->config['impressum']['notes']           additional informations that should
+                                                be displayed in the Impressum block
+ 
+

addon/impressum/admin.tpl

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+{{ inc field_input.tpl with $field=$owner }}{{ endinc }}
+{{ inc field_input.tpl with $field=$ownerprofile }}{{ endinc }}
+{{ inc field_input.tpl with $field=$postal }}{{ endinc }}
+{{ inc field_input.tpl with $field=$notes }}{{ endinc }}
+{{ inc field_input.tpl with $field=$email }}{{ endinc }}
+<div class="submit"><input type="submit" name="page_site" value="$submit" /></div>

addon/impressum/impressum.php

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+<?php
+/**
+ * Name: Impressum
+ * Description: Plugin to add contact information to the about page (/friendika)
+ * Version: 1.0
+ * Author: Tobias Diekershoff <https://diekershoff.homeunix.net/friendika/profile/tobias>
+ * License: 3-clause BSD license (same as Friendika)
+ */
+
+function impressum_install() {
+    register_hook('about_hook', 'addon/impressum/impressum.php', 'impressum_show');
+    logger("installed impressum plugin");
+}
+
+function impressum_uninstall() {
+    unregister_hook('about_hook', 'addon/impressum/impressum.php', 'impressum_show');
+    logger("uninstalled impressum plugin");
+}
+function obfuscate_email ($s) {
+    $s = str_replace('@','(at)',$s);
+    $s = str_replace('.','(dot)',$s);
+    return $s;
+}
+function impressum_show($a,&$b) {
+    $b .= '<h3>'.t('Impressum').'</h3>';
+    $owner = get_config('impressum', 'owner');
+    $owner_profile = get_config('impressum','ownerprofile');
+    $postal = get_config('impressum', 'postal');
+    $notes = get_config('impressum', 'notes');
+    $email = obfuscate_email( get_config('impressum','email') );
+    if (strlen($owner)) {
+        if (strlen($owner_profile)) {
+            $tmp = '<a href="'.$owner_profile.'">'.$owner.'</a>';
+        } else {
+            $tmp = $owner;
+        }
+        if (strlen($email)) {
+            $b .= '<p><strong>'.t('Site Owner').'</strong>: '. $tmp .'<br /><strong>'.t('Email Address').'</strong>: '.$email.'</p>';
+        } else {
+            $b .= '<p><strong>'.t('Site Owner').'</strong>: '. $tmp .'</p>';
+        }
+        if (strlen($postal)) {
+            $b .= '<p><strong>'.t('Postal Address').'</strong><br />'. $postal .'</p>';
+        }
+        if (strlen($notes)) {
+            $b .= '<p>'.$notes.'</p>';
+        }
+    } else {
+        $b .= '<p>'.t('The impressum addon needs to be configured!<br />Please add at least the <tt>owner</tt> variable to your config file. For other variables please refer to the README file of the addon.').'</p>';
+    }
+}
+
+function impressum_plugin_admin_post (&$a) {
+    $owner = ((x($_POST, 'owner')) ? notags(trim($_POST['owner'])) : '');
+    $ownerprofile = ((x($_POST, 'ownerprofile')) ? notags(trim($_POST['ownerprofile'])) : '');
+    $postal = ((x($_POST, 'postal')) ? (trim($_POST['postal'])) : '');
+    $notes = ((x($_POST, 'notes')) ? (trim($_POST['notes'])) : '');
+    $email = ((x($_POST, 'email')) ? notags(trim($_POST['email'])) : '');
+    set_config('impressum','owner',$owner);
+    set_config('impressum','ownerprofile',$ownerprofile);
+    set_config('impressum','postal',$postal);
+    set_config('impressum','email',$email);
+    set_config('impressum','notes',$notes);
+    info( t('Settings updated.'). EOL );
+}
+function impressum_plugin_admin (&$a, &$o) {
+    $t = file_get_contents( dirname(__file__). "/admin.tpl" );
+    $o = replace_macros($t, array(
+        '$submit' => t('Submit'),
+        '$owner' => array('owner', t('Site Owner'), get_config('impressum','owner'), ''),
+        '$ownerprofile' => array('ownerprofile', t('Site Owners Profile'), get_config('impressum','ownerprofile'), ''),
+        '$postal' => array('postal', t('Postal Address'), get_config('impressum','postal'), ''),
+        '$notes' => array('notes', t('Notes'), get_config('impressum','notes'), ''),
+        '$email' => array('email', t('Email Address'), get_config('impressum','email'), ''),
+    ));
+}