FCM 目标条件语法
FCM Target condition syntax
我一直找不到任何官方 FCM 文档来解释构造传递给 FCM 的条件字符串以发送有针对性的推送的正确语法。我正在使用出色的 Firebase Admin SDK for PHP，我可以用它来定位外发消息收件人
CloudMessage::withTarget('condition',$condition)->withNotification($notif)->withData($data);
通常，我可以建立简单的条件，例如
"('topicFoo' in topics) && !('topicBar' in topics)";
这将确保消息发送给 topicFoo 的所有订阅者，他们不是主题 topicBar 的订阅者。我通过反复试验为自己解决了这个问题。但是假设我想构建更复杂的条件，例如
"(('topicFoo1' in topics) || ('topicFoo2' in topics)) && !(('topicBar1 in topics) || ('topicBar2' in topics))"
虽然我也可以通过反复试验来解决这个问题，但最好有明确的 Google 文档来解释可以做什么和不能做什么。 FCM 是否存在最大条件复杂度？
据我所知，关于 sending messages to topics 的文档包含有关条件的这一部分：
To send a message to a combination of topics, specify a condition, which is a boolean expression that specifies the target topics. For example, the following condition will send messages to devices that are subscribed to TopicA and either TopicB or TopicC:
"'TopicA' in topics && ('TopicB' in topics || 'TopicC' in topics)"
FCM first evaluates any conditions in parentheses, and then evaluates the expression from left to right. In the above expression, a user subscribed to any single topic does not receive the message. Likewise, a user who does not subscribe to TopicA does not receive the message. These combinations do receive it:
TopicA and TopicBTopicA and TopicC
You can include up to five topics in your conditional expression.
还有一个用于发送到带有条件的主题的代码片段，因此我建议您也在 link 中查看它。
我一直找不到任何官方 FCM 文档来解释构造传递给 FCM 的条件字符串以发送有针对性的推送的正确语法。我正在使用出色的 Firebase Admin SDK for PHP，我可以用它来定位外发消息收件人
CloudMessage::withTarget('condition',$condition)->withNotification($notif)->withData($data);
通常，我可以建立简单的条件，例如
"('topicFoo' in topics) && !('topicBar' in topics)";
这将确保消息发送给 topicFoo 的所有订阅者，他们不是主题 topicBar 的订阅者。我通过反复试验为自己解决了这个问题。但是假设我想构建更复杂的条件，例如
"(('topicFoo1' in topics) || ('topicFoo2' in topics)) && !(('topicBar1 in topics) || ('topicBar2' in topics))"
虽然我也可以通过反复试验来解决这个问题，但最好有明确的 Google 文档来解释可以做什么和不能做什么。 FCM 是否存在最大条件复杂度？
据我所知，关于 sending messages to topics 的文档包含有关条件的这一部分：
To send a message to a combination of topics, specify a condition, which is a boolean expression that specifies the target topics. For example, the following condition will send messages to devices that are subscribed to
TopicAand eitherTopicBorTopicC:"'TopicA' in topics && ('TopicB' in topics || 'TopicC' in topics)"FCM first evaluates any conditions in parentheses, and then evaluates the expression from left to right. In the above expression, a user subscribed to any single topic does not receive the message. Likewise, a user who does not subscribe to
TopicAdoes not receive the message. These combinations do receive it:
TopicAandTopicBTopicAandTopicCYou can include up to five topics in your conditional expression.
还有一个用于发送到带有条件的主题的代码片段，因此我建议您也在 link 中查看它。