Method needs

app/src/main/java/eu/faircode/email/EntityRule.java:182–217

(List<EntityRule> rules, String what)

    }

    private static boolean needs(List<EntityRule> rules, String what) {
        for (EntityRule rule : rules)
            try {
                JSONObject jaction = new JSONObject(rule.action);
                int type = jaction.getInt("type");
                if (type == TYPE_SUMMARIZE || type == TYPE_AUTOMATION)
                    return true;

                JSONObject jcondition = new JSONObject(rule.condition);

                if (jcondition.has(what)) {
                    if ("header".equals(what)) {
                        JSONObject jheader = jcondition.getJSONObject("header");
                        String value = jheader.getString("value");
                        boolean regex = jheader.getBoolean("regex");
                        if (!regex && value.startsWith("$$") && value.endsWith("$"))
                            continue;
                    }
                    return true;
                }

                if (jcondition.has("expression")) {
                    Expression expression = ExpressionHelper.getExpression(rule, null, null, null, null);
                    if (expression != null) {
                        if ("header".equals(what) && ExpressionHelper.needsHeaders(expression))
                            return true;
                        if ("body".equals(what) && ExpressionHelper.needsBody(expression))
                            return true;
                    }
                }
            } catch (Throwable ex) {
                Log.e(ex);
            }

        return false;
    }

    static int run(Context context, List<EntityRule> rules,
                   EntityMessage message, boolean browsed, List<Header> headers, String html)