processor, webhook: send webhooks with customizable payload

- processor will call hook functions with webmention data
- refactor webhook.clj massively
- add dynamic parameter substitution for urls, e.g. {source} {target}
{event}......
- add config option :webhook-request, a function with parameters [hook,
data] that returns a map (resembling {:headers ... :body ...}).
webhook.clj uses this function to generate payload.
- allow map besids URL string in config option :webhook. if it's a URL,
sends webhook request to it with payload generated by :webhook-request;
if it's a map, it should be like {:url ... :request-fn ...}, which
specifies a payload generator.
- add request-fn preset :ntfy

1 files changed, 1 insertions, 0 deletions

diff --git a/resources/config.edn b/resources/config.edn
index d007c87..e5076eb 100644
--- a/resources/config.edn
+++ b/resources/config.edn
@@ -7,4 +7,5 @@
            :on-create []
            :on-update []
            :on-delete []}
+ :webhook-request-fn nil
  :feed-length 8}