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// Copyright (c) 2020 Tulir Asokan
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package pushrules
import (
"encoding/gob"
"maunium.net/go/mautrix/event"
"maunium.net/go/mautrix/id"
"maunium.net/go/mautrix/pushrules/glob"
)
func init() {
gob.Register(PushRuleArray{})
gob.Register(PushRuleMap{})
}
type PushRuleCollection interface {
GetActions(room Room, evt *event.Event) PushActionArray
}
type PushRuleArray []*PushRule
func (rules PushRuleArray) SetType(typ PushRuleType) PushRuleArray {
for _, rule := range rules {
rule.Type = typ
}
return rules
}
func (rules PushRuleArray) GetActions(room Room, evt *event.Event) PushActionArray {
for _, rule := range rules {
if !rule.Match(room, evt) {
continue
}
return rule.Actions
}
return nil
}
type PushRuleMap struct {
Map map[string]*PushRule
Type PushRuleType
}
func (rules PushRuleArray) SetTypeAndMap(typ PushRuleType) PushRuleMap {
data := PushRuleMap{
Map: make(map[string]*PushRule),
Type: typ,
}
for _, rule := range rules {
rule.Type = typ
data.Map[rule.RuleID] = rule
}
return data
}
func (ruleMap PushRuleMap) GetActions(room Room, evt *event.Event) PushActionArray {
var rule *PushRule
var found bool
switch ruleMap.Type {
case RoomRule:
rule, found = ruleMap.Map[string(evt.RoomID)]
case SenderRule:
rule, found = ruleMap.Map[string(evt.Sender)]
}
if found && rule.Match(room, evt) {
return rule.Actions
}
return nil
}
func (ruleMap PushRuleMap) Unmap() PushRuleArray {
array := make(PushRuleArray, len(ruleMap.Map))
index := 0
for _, rule := range ruleMap.Map {
array[index] = rule
index++
}
return array
}
type PushRuleType string
const (
OverrideRule PushRuleType = "override"
ContentRule PushRuleType = "content"
RoomRule PushRuleType = "room"
SenderRule PushRuleType = "sender"
UnderrideRule PushRuleType = "underride"
)
type PushRule struct {
// The type of this rule.
Type PushRuleType `json:"-"`
// The ID of this rule.
// For room-specific rules and user-specific rules, this is the room or user ID (respectively)
// For other types of rules, this doesn't affect anything.
RuleID string `json:"rule_id"`
// The actions this rule should trigger when matched.
Actions PushActionArray `json:"actions"`
// Whether this is a default rule, or has been set explicitly.
Default bool `json:"default"`
// Whether or not this push rule is enabled.
Enabled bool `json:"enabled"`
// The conditions to match in order to trigger this rule.
// Only applicable to generic underride/override rules.
Conditions []*PushCondition `json:"conditions,omitempty"`
// Pattern for content-specific push rules
Pattern string `json:"pattern,omitempty"`
}
func (rule *PushRule) Match(room Room, evt *event.Event) bool {
if !rule.Enabled {
return false
}
switch rule.Type {
case OverrideRule, UnderrideRule:
return rule.matchConditions(room, evt)
case ContentRule:
return rule.matchPattern(room, evt)
case RoomRule:
return id.RoomID(rule.RuleID) == evt.RoomID
case SenderRule:
return id.UserID(rule.RuleID) == evt.Sender
default:
return false
}
}
func (rule *PushRule) matchConditions(room Room, evt *event.Event) bool {
for _, cond := range rule.Conditions {
if !cond.Match(room, evt) {
return false
}
}
return true
}
func (rule *PushRule) matchPattern(room Room, evt *event.Event) bool {
pattern, err := glob.Compile(rule.Pattern)
if err != nil {
return false
}
msg, ok := evt.Content.Raw["body"].(string)
if !ok {
return false
}
return pattern.MatchString(msg)
}
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