1-- spam_detector.lua
 2-- Flags incoming emails that match common spam patterns.
 3
 4local matcha = require("matcha")
 5
 6local spam_patterns = {
 7    "you have won",
 8    "claim your prize",
 9    "act now",
10    "limited time offer",
11    "click here immediately",
12    "congratulations!",
13    "urgent action required",
14    "unsubscribe",
15}
16
17matcha.on("email_received", function(email)
18    local subj = email.subject:lower()
19    for _, pattern in ipairs(spam_patterns) do
20        if subj:find(pattern, 1, true) then
21            matcha.notify("Possible spam: " .. email.subject, 3)
22            return
23        end
24    end
25end)