Add support for raw json template as content and add docs

README.md

@@ -1,2 +1,55 @@
 # reactbot
 A simple [maubot](https://github.com/maubot/maubot) that responds to messages that match predefined rules.
+
+## Config format
+### Templates
+Templates contain the actual event type and content to be sent.
+* `type` - The Matrix event type to send
+* `content` - The event content. Either an object or jinja2 template that produces JSON.
+* `variables` - A key-value map of variables.
+
+Variables are parsed as jinja2 templates and get the maubot event object in `event`.
+
+If the content is a string, it'll be parsed as a jinja2 template and the output
+will be parsed as JSON. The content jinja2 template will get `event` just like
+variable templates, but it will also get all of the variables.
+
+If the content is an object, that object is what will be sent as the content.
+The object can contain variables using a custom syntax: All instances of
+`$${variablename}` will be replaced with the value matching `variablename`.
+This works in object keys and values and list items. If a key/value/item only
+consists of a variable insertion, the variable may be of any type. If there's
+something else than the variable, the variable will be concatenated using `+`,
+which means it should be a string.
+
+### Default flags
+Default regex flags. Most Python regex flags are available.
+See [docs](https://docs.python.org/3/library/re.html#re.A).
+
+Most relevant flags:
+* `i` / `ignorecase` - Case-insensitive matching.
+* `s` / `dotall` - Make `.` match any character at all, including newline.
+* `x` / `verbose` - Ignore comments and whitespace in regex.
+* `m` / `multiline` - When specified, `^` and `$` match the start and end of
+                      line respectively instead of start and end of whole string.
+
+### Rules
+Rules have five fields. Only `matches` and `template` are required.
+* `rooms` - The list of rooms where the rule should apply.
+            If empty, the rule will apply to all rooms the bot is in.
+* `matches` - The regex or list of regexes to match.
+* `template` - The name of the template to use.
+* `variables` - A key-value map of variables to extend or override template variables.
+                Like with template variables, the values are parsed as Jinja2 templates.
+
+The regex(es) in `matches` can either be simple strings containing the pattern,
+or objects containing additional info:
+* `pattern` - The regex to match.
+* `flags` - Regex flags (replaces default flags).
+* `raw` - Whether or not the regex should be forced to be raw.
+
+If `raw` is `true` OR the pattern contains no special regex characters other
+than `^` at the start and/or `$` at the end, the pattern will be considered
+"raw". Raw patterns don't use regex, but instead use faster string operators
+(equality, starts/endwith, contains). Patterns with the `multiline` flag will
+never be converted into raw patterns implicitly.

reactbot.py

@@ -16,6 +16,7 @@
 from typing import (NewType, Optional, Callable, Pattern, Match, Union, Dict, List, Tuple, Set,
                     Type, Any)
 from itertools import chain
+import json
 import copy
 import re
 
@@ -69,6 +70,7 @@ class SimplePattern:
 
 RMatch = Union[Match, BlankMatch]
 RPattern = Union[Pattern, SimplePattern]
+InputPattern = Union[str, Dict[str, str]]
 
 Index = NewType("Index", Union[str, int, Key])
 
@@ -79,7 +81,7 @@ variable_regex = re.compile(r"\$\${([0-9A-Za-z-_]+)}")
 class Template:
     type: EventType
     variables: Dict[str, JinjaTemplate]
-    content: Dict[str, Any]
+    content: Union[Dict[str, Any], JinjaTemplate]
 
     _variable_locations: List[Tuple[Index, ...]] = None
 
@@ -122,6 +124,9 @@ class Template:
         variables = {**{name: template.render(event=evt)
                         for name, template in chain(self.variables.items(), rule_vars.items())},
                      **extra_vars}
+        if isinstance(self.content, JinjaTemplate):
+            raw_json = self.content.render(event=evt, **variables)
+            return json.loads(raw_json)
         content = copy.deepcopy(self.content)
         for path in self._variable_locations:
             data: Dict[str, Any] = self._recurse(content, path[:-1])
@@ -187,16 +192,26 @@ class ReactBot(Plugin):
         return {name: JinjaTemplate(var_tpl) for name, var_tpl
                 in data.get("variables", {}).items()}
 
+    def _parse_content(self, content: Union[Dict[str, Any], str]
+                       ) -> Union[Dict[str, Any], JinjaTemplate]:
+        if not content:
+            return {}
+        elif isinstance(content, str):
+            return JinjaTemplate(content)
+        return content
+
     def _make_template(self, name: str, tpl: Dict[str, Any]) -> Template:
         try:
             return Template(type=EventType.find(tpl.get("type", "m.room.message")),
                             variables=self._parse_variables(tpl),
-                            content=tpl.get("content", {})).init()
+                            content=self._parse_content(tpl.get("content", None))).init()
         except Exception as e:
             raise ConfigError(f"Failed to load {name}") from e
 
-    def _get_flags(self, flags: str) -> re.RegexFlag:
-        output = self.default_flags
+    def _get_flags(self, flags: Union[str, List[str]]) -> re.RegexFlag:
+        if not flags:
+            return self.default_flags
+        output = re.RegexFlag(0)
         for flag in flags:
             flag = flag.lower()
             if flag == "i" or flag == "ignorecase":
@@ -215,14 +230,14 @@ class ReactBot(Plugin):
                 output |= re.ASCII
         return output
 
-    def _compile(self, pattern: str) -> RPattern:
+    def _compile(self, pattern: InputPattern) -> RPattern:
         flags = self.default_flags
-        raw = False
+        raw = None
         if isinstance(pattern, dict):
             flags = self._get_flags(pattern.get("flags", ""))
             raw = pattern.get("raw", False)
             pattern = pattern["pattern"]
-        if not flags or flags == re.IGNORECASE:
+        if raw is not False and (not flags & re.MULTILINE or raw is True):
             ignorecase = flags == re.IGNORECASE
             s_pattern = pattern.lower() if ignorecase else pattern
             esc = ""
@@ -242,8 +257,11 @@ class ReactBot(Plugin):
                 return SimplePattern(lambda val: s_pattern in val, ignorecase=ignorecase)
         return re.compile(pattern, flags=flags)
 
-    def _compile_all(self, patterns: List[str]) -> List[RPattern]:
-        return [self._compile(pattern) for pattern in patterns]
+    def _compile_all(self, patterns: Union[InputPattern, List[InputPattern]]) -> List[RPattern]:
+        if isinstance(patterns, list):
+            return [self._compile(pattern) for pattern in patterns]
+        else:
+            return [self._compile(patterns)]
 
     def _make_rule(self, name: str, rule: Dict[str, Any]) -> Rule:
         try: