1 | <?php |
||
22 | class SocialShare |
||
23 | { |
||
24 | /** |
||
25 | * @var Cache |
||
26 | */ |
||
27 | private $cache; |
||
28 | /** |
||
29 | * @var ProviderInterface[] |
||
30 | */ |
||
31 | private $providers = array(); |
||
32 | /** |
||
33 | * @var array |
||
34 | */ |
||
35 | private $toUpdate = array(); |
||
36 | |||
37 | /** |
||
38 | * @param Cache $cache |
||
39 | */ |
||
40 | public function __construct(Cache $cache) |
||
44 | |||
45 | /** |
||
46 | * Registers a provider. |
||
47 | * |
||
48 | * @param ProviderInterface $provider |
||
49 | * @param int|\DateInterval $lifeTime Life time in seconds or a \DateInterval instance |
||
50 | */ |
||
51 | public function registerProvider(ProviderInterface $provider, $lifeTime = 3600) |
||
52 | { |
||
53 | if (!$lifeTime instanceof \DateInterval) { |
||
54 | $lifeTime = new \DateInterval(sprintf('PT%dS', $lifeTime)); |
||
55 | } |
||
56 | |||
57 | $this->providers[$provider->getName()] = array('provider' => $provider, 'lifeTime' => $lifeTime); |
||
58 | } |
||
59 | |||
60 | /** |
||
61 | * Gets the sharing links for the given provider and url. |
||
62 | * |
||
63 | * @param string $providerName |
||
64 | * @param string $url |
||
65 | * @param array $options |
||
66 | * |
||
67 | * @throws \RuntimeException |
||
68 | * |
||
69 | * @return string |
||
70 | */ |
||
71 | public function getLink($providerName, $url, array $options = array()) |
||
72 | { |
||
73 | $this->checkProvider($providerName); |
||
74 | |||
75 | return $this->providers[$providerName]['provider']->getLink($url, $options); |
||
76 | } |
||
77 | |||
78 | /** |
||
79 | * Gets the number of share of the given URL on the given provider. |
||
80 | * |
||
81 | * @param string $providerName |
||
82 | * @param string $url |
||
83 | * @param bool $delayUpdate |
||
84 | * |
||
85 | * @throws \RuntimeException |
||
86 | * |
||
87 | * @return int |
||
88 | */ |
||
89 | public function getShares($providerName, $url, $delayUpdate = false) |
||
90 | { |
||
91 | $this->checkProvider($providerName); |
||
92 | |||
93 | $id = $this->getId($providerName, $url); |
||
94 | $lifeTime = $this->providers[$providerName]['lifeTime']; |
||
95 | $now = new \DateTime(); |
||
96 | |||
97 | $dataFromCache = $this->cache->fetch($id); |
||
98 | $shares = isset($dataFromCache[0]) ? $dataFromCache[0] : false; |
||
99 | $expired = isset($dataFromCache[1]) && $dataFromCache[1]->add($lifeTime) < $now; |
||
100 | |||
101 | if (!$delayUpdate && (false === $shares || $expired)) { |
||
102 | $shares = $this->providers[$providerName]['provider']->getShares($url); |
||
103 | |||
104 | $this->cache->save($id, array($shares, $now)); |
||
105 | } else { |
||
106 | if ($delayUpdate && (false === $shares || $expired)) { |
||
107 | $this->toUpdate[$providerName][] = $url; |
||
108 | } |
||
109 | |||
110 | $shares = intval($shares); |
||
111 | } |
||
112 | |||
113 | return $shares; |
||
114 | } |
||
115 | |||
116 | /** |
||
117 | * Gets the total number of share of the given URL for all providers. |
||
118 | * |
||
119 | * @param string $url |
||
120 | * |
||
121 | * @throws \RuntimeException |
||
122 | * |
||
123 | * @return int |
||
124 | */ |
||
125 | public function getSharesTotal($url) |
||
126 | { |
||
127 | $shares = 0; |
||
128 | foreach ($this->providers as $providerName => $provider) { |
||
129 | $shares += $this->getShares($providerName, $url); |
||
130 | } |
||
131 | |||
132 | return $shares; |
||
133 | } |
||
134 | |||
135 | /** |
||
136 | * Updates delayed URLs. |
||
137 | */ |
||
138 | public function update() |
||
139 | { |
||
140 | $now = new \DateTime(); |
||
141 | |||
142 | foreach ($this->toUpdate as $providerName => $urls) { |
||
143 | foreach ($urls as $url) { |
||
144 | $shares = $this->providers[$providerName]['provider']->getShares($url); |
||
145 | |||
146 | $this->cache->save($this->getId($providerName, $url), array($shares, $now)); |
||
147 | } |
||
148 | } |
||
149 | } |
||
150 | |||
151 | /** |
||
152 | * Checks if the provider is registered. |
||
153 | * |
||
154 | * @param string $providerName |
||
155 | * |
||
156 | * @throws \RuntimeException |
||
157 | */ |
||
158 | private function checkProvider($providerName) |
||
159 | { |
||
160 | if (!isset($this->providers[$providerName])) { |
||
161 | throw new \RuntimeException(sprintf('Unknown provider "%s".', $providerName)); |
||
162 | } |
||
163 | } |
||
164 | |||
165 | /** |
||
166 | * Gets the ID corresponding to this provider name and URL. |
||
167 | * |
||
168 | * @param string $providerName |
||
169 | * @param string $url |
||
170 | * |
||
171 | * @return string |
||
172 | */ |
||
173 | private function getId($providerName, $url) |
||
177 | } |
||
178 |