Bump golang.org/x/text from 0.3.3 to 0.3.4 (#79)

Bumps [golang.org/x/text](https://github.com/golang/text) from 0.3.3 to 0.3.4.
- [Release notes](https://github.com/golang/text/releases)
- [Commits](https://github.com/golang/text/compare/v0.3.3...v0.3.4)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

.dependabot/config.yml

@@ -0,0 +1,8 @@
+version: 1
+update_configs:
+  - package_manager: "go:modules"
+    directory: "/"
+    update_schedule: "daily"
+  - package_manager: "docker"
+    directory: "/"
+    update_schedule: "weekly"

.drone.yml

@@ -1,37 +0,0 @@
-workspace:
-  base: /go
-  path: src/github.com/prologic/eris
-
-pipeline:
-  build:
-    image: golang
-    commands:
-      - go get -d ./...
-      - go build .
-
-  test:
-    image: golang
-    commands:
-      - go get -d ./...
-      - go test ./...
-
-  docker:
-    image: plugins/docker
-    repo: r.mills.io/prologic/eris
-    registry: r.mills.io
-    secrets: [ docker_username, docker_password ]
-
-  notify:
-    image: drillster/drone-email
-    host: mail_poste
-    port: 25
-    from: drone@mills.io
-    skip_verify: true 
-    when:
-      status: [ success, changed, failure ]
-
-secrets:
-  registry_username:
-    external: true
-  registry_password:
-    external: true

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,35 @@
+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Desktop (please complete the following information):**
+ - OS: [e.g. iOS]
+ - Browser [e.g. chrome, safari]
+ - Version [e.g. 22]
+
+**Smartphone (please complete the following information):**
+ - Device: [e.g. iPhone6]
+ - OS: [e.g. iOS8.1]
+ - Browser [e.g. stock browser, safari]
+ - Version [e.g. 22]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,17 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/workflows/build.yml

@@ -0,0 +1,35 @@
+---
+name: Build
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+jobs:
+  build:
+    name: Build
+    strategy:
+      matrix:
+        go-version:
+          - "1.12.x"
+          - "1.13.x"
+          - "1.14.x"
+        os:
+          - "ubuntu-latest"
+          - "macos-latest"
+          - "windows-latest"
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Setup Go ${{ matrix.go-version }}
+        uses: actions/setup-go@v1
+        with:
+          go-version: ${{ matrix.go-version }}
+        id: go
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Build
+        run: |
+            go build -v .
+      - name: Test
+        run: |
+            go test -v -race .

.gitignore

@@ -1,7 +1,9 @@
-*~*
-bin
-dist
+*~
 *.db
+*.bak
 *.pem
 
-eris
+/bin
+/dist
+/eris
+/coverage.txt

.gitmodules

@@ -1,60 +0,0 @@
-[submodule "vendor/github.com/sirupsen/logrus"]
-	path = vendor/github.com/sirupsen/logrus
-	url = https://github.com/sirupsen/logrus
-[submodule "vendor/golang.org/x/crypto"]
-	path = vendor/golang.org/x/crypto
-	url = https://go.googlesource.com/crypto
-[submodule "vendor/golang.org/x/sys"]
-	path = vendor/golang.org/x/sys
-	url = https://go.googlesource.com/sys
-[submodule "vendor/github.com/DanielOaks/girc-go"]
-	path = vendor/github.com/DanielOaks/girc-go
-	url = https://github.com/DanielOaks/girc-go
-[submodule "vendor/github.com/goshuirc/e-nfa"]
-	path = vendor/github.com/goshuirc/e-nfa
-	url = https://github.com/goshuirc/e-nfa
-[submodule "vendor/github.com/imdario/mergo"]
-	path = vendor/github.com/imdario/mergo
-	url = https://github.com/imdario/mergo
-[submodule "vendor/golang.org/x/text"]
-	path = vendor/golang.org/x/text
-	url = https://go.googlesource.com/text
-[submodule "vendor/gopkg.in/yaml.v2"]
-	path = vendor/gopkg.in/yaml.v2
-	url = https://gopkg.in/yaml.v2
-[submodule "vendor/github.com/prometheus/client_golang"]
-	path = vendor/github.com/prometheus/client_golang
-	url = https://github.com/prometheus/client_golang
-[submodule "vendor/github.com/beorn7/perks"]
-	path = vendor/github.com/beorn7/perks
-	url = https://github.com/beorn7/perks
-[submodule "vendor/github.com/golang/protobuf"]
-	path = vendor/github.com/golang/protobuf
-	url = https://github.com/golang/protobuf
-[submodule "vendor/github.com/prometheus/client_model"]
-	path = vendor/github.com/prometheus/client_model
-	url = https://github.com/prometheus/client_model
-[submodule "vendor/github.com/prometheus/common"]
-	path = vendor/github.com/prometheus/common
-	url = https://github.com/prometheus/common
-[submodule "vendor/github.com/matttproud/golang_protobuf_extensions"]
-	path = vendor/github.com/matttproud/golang_protobuf_extensions
-	url = https://github.com/matttproud/golang_protobuf_extensions
-[submodule "vendor/github.com/prometheus/procfs"]
-	path = vendor/github.com/prometheus/procfs
-	url = https://github.com/prometheus/procfs
-[submodule "vendor/github.com/thoj/go-ircevent"]
-	path = vendor/github.com/thoj/go-ircevent
-	url = https://github.com/thoj/go-ircevent
-[submodule "vendor/github.com/stretchr/testify"]
-	path = vendor/github.com/stretchr/testify
-	url = https://github.com/stretchr/testify
-[submodule "vendor/github.com/renstrom/shortuuid"]
-	path = vendor/github.com/renstrom/shortuuid
-	url = https://github.com/renstrom/shortuuid
-[submodule "vendor/github.com/mmcloughlin/professor"]
-	path = vendor/github.com/mmcloughlin/professor
-	url = https://github.com/mmcloughlin/professor
-[submodule "vendor/github.com/google/uuid"]
-	path = vendor/github.com/google/uuid
-	url = https://github.com/google/uuid

.travis.yml

@@ -1,8 +0,0 @@
-language: go
-sudo: false
-go:
-  - tip
-before_install:
-  - go get github.com/mattn/goveralls
-script:
-  - $HOME/gopath/bin/goveralls -service=travis-ci

.yamllint.yml

@@ -0,0 +1,29 @@
+---
+yaml-files:
+  - '*.yaml'
+  - '*.yml'
+  - '.yamllint'
+
+rules:
+  braces: enable
+  brackets: enable
+  colons: enable
+  commas: enable
+  comments: disable
+  comments-indentation: disable
+  document-end: disable
+  document-start:
+    level: warning
+  empty-lines: enable
+  empty-values: disable
+  hyphens: enable
+  indentation: enable
+  key-duplicates: enable
+  key-ordering: disable
+  line-length: disable
+  new-line-at-end-of-file: enable
+  new-lines: enable
+  octal-values: enable
+  quoted-strings: disable
+  trailing-spaces: enable
+  truthy: disable

CODE_OF_CONDUCT.md

@@ -0,0 +1,46 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as contributors and maintainers pledge to making participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable behavior and are expected to take appropriate and fair corrective action in response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors that they deem inappropriate, threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces when an individual is representing the project or its community. Examples of representing a project or community include using an official project e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event. Representation of a project may be further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project team at prologic@shortcircuit.net.au. The project team will review and investigate all complaints, and will respond in a way that it deems appropriate to the circumstances. The project team is obligated to maintain confidentiality with regard to the reporter of an incident. Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good faith may face temporary or permanent repercussions as determined by other members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4, available at [http://contributor-covenant.org/version/1/4][version]
+
+[homepage]: http://contributor-covenant.org
+[version]: http://contributor-covenant.org/version/1/4/

Makefile

@@ -33,7 +33,7 @@ bench:
 	@go test -v -bench ./...
 
 test:
-	@go test -v -cover -race ./...
+	@go test -v -cover -coverprofile=coverage.txt -covermode=atomic -coverpkg=./... -race ./...
 
 clean:
-	@rm -rf $(APP)
+	@git clean -f -d -X

PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,3 @@
+<one line description here>
+
+Fixes #xx

README.md

@@ -1,10 +1,10 @@
 eris - IRC Server / Daemon written in Go
 
-[![Build Status](https://travis-ci.org/prologic/eris.svg)](https://travis-ci.org/prologic/eris)
-[![Go Report Card](https://goreportcard.com/badge/github.com/prologic/eris)](https://goreportcard.com/report/github.com/prologic/eris)
-[![Coverage](https://coveralls.io/repos/prologic/eris/badge.svg)](https://coveralls.io/r/prologic/eris)
-[![GoDoc](https://godoc.org/github.com/prologic/eris?status.svg)](https://godoc.org/github.com/prologic/eris)
-[![Wiki](https://img.shields.io/badge/docs-wiki-blue.svg)](https://github.com/prologic/eris/wiki)
+[![Build Status](https://cloud.drone.io/api/badges/prologic/eris/status.svg)](https://cloud.drone.io/prologic/eris)
+[![CodeCov](https://codecov.io/gh/prologic/eris/branch/master/graph/badge.svg)](https://codecov.io/gh/prologic/eris)
+[![Go Report Card](https://goreportcard.com/badge/prologic/eris)](https://goreportcard.com/report/prologic/eris)
+[![GoDoc](https://godoc.org/github.com/prologic/eris?status.svg)](https://godoc.org/github.com/prologic/eris) 
+[![Sourcegraph](https://sourcegraph.com/github.com/prologic/eris/-/badge.svg)](https://sourcegraph.com/github.com/prologic/eris?badge)
 
 > This project and repository is based off of [ergonomadic](https://github.com/edmund-huber/ergonomadic)
 > and much of my original contributions were made in my [fork of ergonomadic](https://github.com/prologic/ergonomadic)
@@ -170,6 +170,11 @@ There are a number of supported accompanying services that are being developed a
 
 * [Dispatch](https://github.com/khlieng/dispatch) -- TLS, Multiple Servers and Users, Client Certificates
 
+## Related Projects
+
+* [cadmus](https://github.com/prologic/cadmus) -- an IRC Bot written in Go that logs IRC Channels and provides an interface to view and search those logs
+* [soter](https://github.com/prologic/soter) -- an IRC Bot written in Go that protects IRC Channels by persisting channel modes and topics
+
 ## License
 
 eris is licensed under the MIT License.

_config.yml

@@ -0,0 +1 @@
+theme: jekyll-theme-architect

go.mod

@@ -0,0 +1,19 @@
+module github.com/prologic/eris
+
+go 1.14
+
+require (
+	github.com/DanielOaks/girc-go v0.0.0-20180430075055-8d136c4f9287
+	github.com/google/uuid v1.1.0 // indirect
+	github.com/goshuirc/e-nfa v0.0.0-20160917075329-7071788e3940 // indirect
+	github.com/imdario/mergo v0.3.11
+	github.com/mmcloughlin/professor v0.0.0-20170922221822-6b97112ab8b3
+	github.com/prometheus/client_golang v0.9.4
+	github.com/renstrom/shortuuid v3.0.0+incompatible
+	github.com/sirupsen/logrus v1.7.0
+	github.com/stretchr/testify v1.6.0
+	github.com/thoj/go-ircevent v0.0.0-20180816043103-14f3614f28c3
+	golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9
+	golang.org/x/text v0.3.4
+	gopkg.in/yaml.v2 v2.3.0
+)

go.sum

@@ -0,0 +1,100 @@
+github.com/DanielOaks/girc-go v0.0.0-20180430075055-8d136c4f9287 h1:xOE8jDDulcwdPG+coLps6seNn6yERt5xgKSATNqWUM0=
+github.com/DanielOaks/girc-go v0.0.0-20180430075055-8d136c4f9287/go.mod h1:nn+Gr++RLey8iGwfvI84UO5oZal6Muz7qPxDII0BsQ8=
+github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973 h1:xJ4a3vCFaGF/jqvzLMYoU8P317H5OQ+Via4RmuPwCS0=
+github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
+github.com/beorn7/perks v1.0.0 h1:HWo1m869IqiPhD389kmkxeTalrjNbbJTC8LXupb+sl0=
+github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
+github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
+github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
+github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
+github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.1 h1:YF8+flBXS5eO826T4nzqPrxfhQThhXl0YzfuUPu4SBg=
+github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/google/uuid v1.1.0 h1:Jf4mxPC/ziBnoPIdpQdPJ9OeiomAUHLvxmPRSPH9m4s=
+github.com/google/uuid v1.1.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/goshuirc/e-nfa v0.0.0-20160917075329-7071788e3940 h1:KmRLPRstEJiE/9OjumKqI8Rccip8Qmyw2FwyTFxtVqs=
+github.com/goshuirc/e-nfa v0.0.0-20160917075329-7071788e3940/go.mod h1:VOmrX6cmj7zwUeexC9HzznUdTIObHqIXUrWNYS+Ik7w=
+github.com/imdario/mergo v0.3.9 h1:UauaLniWCFHWd+Jp9oCEkTBj8VO/9DKg3PV3VCNMDIg=
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+github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
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+github.com/mmcloughlin/professor v0.0.0-20170922221822-6b97112ab8b3/go.mod h1:LQkXsHRSPIEklPCq8OMQAzYNS2NGtYStdNE/ej1oJU8=
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irc/channel.go

@@ -51,7 +51,7 @@ func (channel *Channel) Names(client *Client) {
 }
 
 func (channel *Channel) ClientIsOperator(client *Client) bool {
-	return client.flags[Operator] || channel.members.HasMode(client, ChannelOperator)
+	return client.modes.Has(Operator) || channel.members.HasMode(client, ChannelOperator)
 }
 
 func (channel *Channel) Nicks(target *Client) []string {
@@ -96,7 +96,7 @@ func (channel *Channel) String() string {
 
 // <mode> <mode params>
 func (channel *Channel) ModeString(client *Client) (str string) {
-	isMember := client.flags[Operator] || channel.members.Has(client)
+	isMember := client.modes.Has(Operator) || channel.members.Has(client)
 	showKey := isMember && (channel.key != "")
 	showUserLimit := channel.userLimit > 0
 
@@ -244,7 +244,7 @@ func (channel *Channel) CanSpeak(client *Client) bool {
 		channel.members.HasMode(client, ChannelOperator)) {
 		return false
 	}
-	if channel.flags.Has(SecureChan) && !client.flags[SecureConn] {
+	if channel.flags.Has(SecureChan) && !client.modes.Has(SecureConn) {
 		return false
 	}
 	return true
@@ -513,7 +513,7 @@ func (channel *Channel) Invite(invitee *Client, inviter *Client) {
 
 	inviter.RplInviting(invitee, channel.name)
 	invitee.Reply(RplInviteMsg(inviter, invitee, channel.name))
-	if invitee.flags[Away] {
+	if invitee.modes.Has(Away) {
 		inviter.RplAway(invitee)
 	}
 }

irc/client.go

@@ -47,7 +47,7 @@ type Client struct {
 	capState     CapState
 	channels     *ChannelSet
 	ctime        time.Time
-	flags        map[UserMode]bool
+	modes        *UserModeSet
 	hasQuit      *SyncBool
 	hops         uint
 	hostname     Name
@@ -67,14 +67,14 @@ type Client struct {
 
 func NewClient(server *Server, conn net.Conn) *Client {
 	now := time.Now()
-	client := &Client{
+	c := &Client{
 		atime:        now,
 		authorized:   len(server.password) == 0,
 		capState:     CapNone,
 		capabilities: make(CapabilitySet),
 		channels:     NewChannelSet(),
 		ctime:        now,
-		flags:        make(map[UserMode]bool),
+		modes:        NewUserModeSet(),
 		hasQuit:      NewSyncBool(false),
 		sasl:         NewSaslState(),
 		server:       server,
@@ -83,51 +83,50 @@ func NewClient(server *Server, conn net.Conn) *Client {
 	}
 
 	if _, ok := conn.(*tls.Conn); ok {
-		client.flags[SecureConn] = true
+		c.modes.Set(SecureConn)
 	}
 
-	client.Touch()
-	go client.writeloop()
-	go client.readloop()
+	c.Touch()
+	go c.writeloop()
+	go c.readloop()
 
-	return client
+	return c
 }
 
 //
 // command goroutine
 //
 
-func (client *Client) writeloop() {
+func (c *Client) writeloop() {
 	for {
 		select {
-		case reply, ok := <-client.replies:
-			if !ok || reply == "" || client.socket == nil {
+		case reply, ok := <-c.replies:
+			if !ok || reply == "" || c.socket == nil {
 				return
 			}
-			client.socket.Write(reply)
+			c.socket.Write(reply)
 		}
 	}
 }
 
-func (client *Client) readloop() {
+func (c *Client) readloop() {
 	var command Command
 	var err error
 	var line string
 
 	// Set the hostname for this client.
-	client.hostname = AddrLookupHostname(client.socket.conn.RemoteAddr())
-	client.hostmask = NewName(SHA256(client.hostname.String()))
+	c.hostname = AddrLookupHostname(c.socket.conn.RemoteAddr())
+	c.hostmask = NewName(SHA256(c.hostname.String()))
 
 	for err == nil {
-		if line, err = client.socket.Read(); err != nil {
+		if line, err = c.socket.Read(); err != nil {
 			command = NewQuitCommand("connection closed")
 
 		} else if command, err = ParseCommand(line); err != nil {
 			switch err {
 			case ErrParseCommand:
 				//TODO(dan): use the real failed numeric for this (400)
-				client.Reply(RplNotice(client.server, client,
-					NewText("failed to parse command")))
+				c.Reply(RplNotice(c.server, c, NewText("failed to parse command")))
 
 			case NotEnoughArgsError:
 				// TODO
@@ -137,7 +136,7 @@ func (client *Client) readloop() {
 			continue
 
 		} else if checkPass, ok := command.(checkPasswordCommand); ok {
-			checkPass.LoadPassword(client.server)
+			checkPass.LoadPassword(c.server)
 			// Block the client thread while handling a potentially expensive
 			// password bcrypt operation. Since the server is single-threaded
 			// for commands, we don't want the server to perform the bcrypt,
@@ -146,189 +145,182 @@ func (client *Client) readloop() {
 			checkPass.CheckPassword()
 		}
 
-		client.processCommand(command)
+		c.processCommand(command)
 	}
 }
 
-func (client *Client) processCommand(cmd Command) {
-	cmd.SetClient(client)
+func (c *Client) processCommand(cmd Command) {
+	cmd.SetClient(c)
 
-	if !client.registered {
+	if !c.registered {
 		regCmd, ok := cmd.(RegServerCommand)
 		if !ok {
-			client.Quit("unexpected command")
+			c.Quit("unexpected command")
 			return
 		}
-		regCmd.HandleRegServer(client.server)
+		regCmd.HandleRegServer(c.server)
 		return
 	}
 
 	srvCmd, ok := cmd.(ServerCommand)
 	if !ok {
-		client.ErrUnknownCommand(cmd.Code())
+		c.ErrUnknownCommand(cmd.Code())
 		return
 	}
 
-	client.server.metrics.Counter("client", "commands").Inc()
+	c.server.metrics.Counter("client", "commands").Inc()
 
 	defer func(t time.Time) {
-		v := client.server.metrics.SummaryVec("client", "command_duration_seconds")
+		v := c.server.metrics.SummaryVec("client", "command_duration_seconds")
 		v.WithLabelValues(cmd.Code().String()).Observe(time.Now().Sub(t).Seconds())
 	}(time.Now())
 
 	switch srvCmd.(type) {
 	case *PingCommand, *PongCommand:
-		client.Touch()
+		c.Touch()
 
 	case *QuitCommand:
 		// no-op
 
 	default:
-		client.Active()
-		client.Touch()
+		c.Active()
+		c.Touch()
 	}
 
-	srvCmd.HandleServer(client.server)
+	srvCmd.HandleServer(c.server)
 }
 
 // quit timer goroutine
 
-func (client *Client) connectionTimeout() {
-	client.processCommand(NewQuitCommand("connection timeout"))
+func (c *Client) connectionTimeout() {
+	c.processCommand(NewQuitCommand("connection timeout"))
 }
 
 //
 // idle timer goroutine
 //
 
-func (client *Client) connectionIdle() {
-	client.server.idle <- client
+func (c *Client) connectionIdle() {
+	c.server.idle <- c
 }
 
 //
 // server goroutine
 //
 
-func (client *Client) Active() {
-	client.atime = time.Now()
+func (c *Client) Active() {
+	c.atime = time.Now()
 }
 
-func (client *Client) Touch() {
-	if client.quitTimer != nil {
-		client.quitTimer.Stop()
+func (c *Client) Touch() {
+	if c.quitTimer != nil {
+		c.quitTimer.Stop()
 	}
 
-	if client.idleTimer == nil {
-		client.idleTimer = time.AfterFunc(IDLE_TIMEOUT, client.connectionIdle)
+	if c.idleTimer == nil {
+		c.idleTimer = time.AfterFunc(IDLE_TIMEOUT, c.connectionIdle)
 	} else {
-		client.idleTimer.Reset(IDLE_TIMEOUT)
+		c.idleTimer.Reset(IDLE_TIMEOUT)
 	}
 }
 
-func (client *Client) Idle() {
-	client.pingTime = time.Now()
-	client.Reply(RplPing(client.server))
+func (c *Client) Idle() {
+	c.pingTime = time.Now()
+	c.Reply(RplPing(c.server))
 
-	if client.quitTimer == nil {
-		client.quitTimer = time.AfterFunc(QUIT_TIMEOUT, client.connectionTimeout)
+	if c.quitTimer == nil {
+		c.quitTimer = time.AfterFunc(QUIT_TIMEOUT, c.connectionTimeout)
 	} else {
-		client.quitTimer.Reset(QUIT_TIMEOUT)
+		c.quitTimer.Reset(QUIT_TIMEOUT)
 	}
 }
 
-func (client *Client) Register() {
-	if client.registered {
+func (c *Client) Register() {
+	if c.registered {
 		return
 	}
-	client.registered = true
-	client.flags[HostMask] = true
-	client.Touch()
+	c.registered = true
+	c.modes.Set(HostMask)
+	c.Touch()
 }
 
-func (client *Client) destroy() {
+func (c *Client) destroy() {
 	// clean up channels
 
-	client.channels.Range(func(channel *Channel) bool {
-		channel.Quit(client)
+	c.channels.Range(func(channel *Channel) bool {
+		channel.Quit(c)
 		return true
 	})
 
 	// clean up server
 
-	if _, ok := client.socket.conn.(*tls.Conn); ok {
-		client.server.metrics.GaugeVec("server", "clients").WithLabelValues("secure").Dec()
+	if _, ok := c.socket.conn.(*tls.Conn); ok {
+		c.server.metrics.GaugeVec("server", "clients").WithLabelValues("secure").Dec()
 	} else {
-		client.server.metrics.GaugeVec("server", "clients").WithLabelValues("insecure").Dec()
+		c.server.metrics.GaugeVec("server", "clients").WithLabelValues("insecure").Dec()
 	}
 
-	client.server.connections.Dec()
-	client.server.clients.Remove(client)
+	c.server.connections.Dec()
+	c.server.clients.Remove(c)
 
 	// clean up self
 
-	if client.idleTimer != nil {
-		client.idleTimer.Stop()
+	if c.idleTimer != nil {
+		c.idleTimer.Stop()
 	}
-	if client.quitTimer != nil {
-		client.quitTimer.Stop()
+	if c.quitTimer != nil {
+		c.quitTimer.Stop()
 	}
 
-	close(client.replies)
+	close(c.replies)
 
-	client.socket.Close()
+	c.socket.Close()
 
-	log.Debugf("%s: destroyed", client)
+	log.Debugf("%s: destroyed", c)
 }
 
-func (client *Client) IdleTime() time.Duration {
-	return time.Since(client.atime)
+func (c *Client) IdleTime() time.Duration {
+	return time.Since(c.atime)
 }
 
-func (client *Client) SignonTime() int64 {
-	return client.ctime.Unix()
+func (c *Client) SignonTime() int64 {
+	return c.ctime.Unix()
 }
 
-func (client *Client) IdleSeconds() uint64 {
-	return uint64(client.IdleTime().Seconds())
+func (c *Client) IdleSeconds() uint64 {
+	return uint64(c.IdleTime().Seconds())
 }
 
-func (client *Client) HasNick() bool {
-	return client.nick != ""
+func (c *Client) HasNick() bool {
+	return c.nick != ""
 }
 
-func (client *Client) HasUsername() bool {
-	return client.username != ""
+func (c *Client) HasUsername() bool {
+	return c.username != ""
 }
 
-func (client *Client) CanSpeak(target *Client) bool {
-	requiresSecure := client.flags[SecureOnly] || target.flags[SecureOnly]
-	isSecure := client.flags[SecureConn] && target.flags[SecureConn]
-	isOperator := client.flags[Operator]
+func (c *Client) CanSpeak(target *Client) bool {
+	requiresSecure := c.modes.Has(SecureOnly) || target.modes.Has(SecureOnly)
+	isSecure := c.modes.Has(SecureConn) && target.modes.Has(SecureConn)
+	isOperator := c.modes.Has(Operator)
 
 	return !requiresSecure || (requiresSecure && (isOperator || isSecure))
 }
 
 // <mode>
 func (c *Client) ModeString() (str string) {
-	for flag := range c.flags {
-		str += flag.String()
-	}
-
-	if len(str) > 0 {
-		str = "+" + str
-	}
-	return
+	return c.modes.String()
 }
 
 func (c *Client) UserHost(cloacked bool) Name {
 	username := "*"
-	if c.HasUsername() {
+	if c.username != "" {
 		username = c.username.String()
 	}
 	if cloacked {
-		return Name(fmt.Sprintf("%s!%s@%s", c.Nick(), username, c.hostmask))
+		return Name(fmt.Sprintf("%s!%s@%s", c.nick, username, c.hostmask))
 	}
-	return Name(fmt.Sprintf("%s!%s@%s", c.Nick(), username, c.hostname))
+	return Name(fmt.Sprintf("%s!%s@%s", c.nick, username, c.hostname))
 }
 
 func (c *Client) Server() Name {
@@ -354,10 +346,10 @@ func (c *Client) String() string {
 	return c.Id().String()
 }
 
-func (client *Client) Friends() *ClientSet {
+func (c *Client) Friends() *ClientSet {
 	friends := NewClientSet()
-	friends.Add(client)
-	client.channels.Range(func(channel *Channel) bool {
+	friends.Add(c)
+	c.channels.Range(func(channel *Channel) bool {
 		channel.members.Range(func(member *Client, _ *ChannelModeSet) bool {
 			friends.Add(member)
 			return true
@@ -367,48 +359,48 @@ func (client *Client) Friends() *ClientSet {
 	return friends
 }
 
-func (client *Client) SetNickname(nickname Name) {
-	if client.HasNick() {
-		log.Errorf("%s nickname already set!", client)
+func (c *Client) SetNickname(nickname Name) {
+	if c.nick != "" {
+		log.Errorf("%s nickname already set!", c)
 		return
 	}
-	client.nick = nickname
-	client.server.clients.Add(client)
+	c.nick = nickname
+	c.server.clients.Add(c)
 }
 
-func (client *Client) ChangeNickname(nickname Name) {
+func (c *Client) ChangeNickname(nickname Name) {
 	// Make reply before changing nick to capture original source id.
-	reply := RplNick(client, nickname)
-	client.server.clients.Remove(client)
-	client.server.whoWas.Append(client)
-	client.nick = nickname
-	client.server.clients.Add(client)
-	client.Friends().Range(func(friend *Client) bool {
+	reply := RplNick(c, nickname)
+	c.server.clients.Remove(c)
+	c.server.whoWas.Append(c)
+	c.nick = nickname
+	c.server.clients.Add(c)
+	c.Friends().Range(func(friend *Client) bool {
 		friend.Reply(reply)
 		return true
 	})
 }
 
-func (client *Client) Reply(reply string) {
-	if !client.hasQuit.Get() {
-		client.replies <- reply
+func (c *Client) Reply(reply string) {
+	if !c.hasQuit.Get() {
+		c.replies <- reply
 	}
 }
 
-func (client *Client) Quit(message Text) {
-	if client.hasQuit.Get() {
+func (c *Client) Quit(message Text) {
+	if c.hasQuit.Get() {
 		return
 	}
 
-	client.hasQuit.Set(true)
-	client.Reply(RplError("quit"))
-	client.server.whoWas.Append(client)
-	friends := client.Friends()
-	friends.Remove(client)
-	client.destroy()
+	c.hasQuit.Set(true)
+	c.Reply(RplError("quit"))
+	c.server.whoWas.Append(c)
+	friends := c.Friends()
+	friends.Remove(c)
+	c.destroy()
 
 	if friends.Count() > 0 {
-		reply := RplQuit(client, message)
+		reply := RplQuit(c, message)
 		friends.Range(func(friend *Client) bool {
 			friend.Reply(reply)
 			return true

irc/modes.go

@@ -108,7 +108,7 @@ func (m *ModeCommand) HandleServer(s *Server) {
 		return
 	}
 
-	if client != target && !client.flags[Operator] {
+	if client != target && !client.modes.Has(Operator) {
 		client.ErrUsersDontMatch()
 		return
 	}
@@ -120,26 +120,24 @@ func (m *ModeCommand) HandleServer(s *Server) {
 		case Invisible, HostMask, WallOps, SecureOnly:
 			switch change.op {
 			case Add:
-				if target.flags[change.mode] {
+				if target.modes.Has(change.mode) {
 					continue
 				}
-				target.flags[change.mode] = true
+				target.modes.Set(change.mode)
 				changes = append(changes, change)
-
 			case Remove:
-				if !target.flags[change.mode] {
+				if !target.modes.Has(change.mode) {
 					continue
 				}
-				delete(target.flags, change.mode)
+				target.modes.Unset(change.mode)
 				changes = append(changes, change)
 			}
-
 		case Operator:
 			if change.op == Remove {
-				if !target.flags[change.mode] {
+				if !target.modes.Has(change.mode) {
 					continue
 				}
-				delete(target.flags, change.mode)
+				target.modes.Unset(change.mode)
 				changes = append(changes, change)
 			}
 		}

irc/nickname.go

@@ -67,7 +67,7 @@ type OperNickCommand struct {
 func (msg *OperNickCommand) HandleServer(server *Server) {
 	client := msg.Client()
 
-	if !client.flags[Operator] {
+	if !client.modes.Has(Operator) {
 		client.ErrNoPrivileges()
 		return
 	}

irc/privacy.go

@@ -5,9 +5,9 @@ func CanSeeChannel(client *Client, channel *Channel) bool {
 	isSecret := channel.flags.Has(Secret)
 
 	isMember := channel.members.Has(client)
-	isOperator := client.flags[Operator]
-	isRegistered := client.flags[Registered]
-	isSecure := client.flags[SecureConn]
+	isOperator := client.modes.Has(Operator)
+	isRegistered := client.modes.Has(Registered)
+	isSecure := client.modes.Has(SecureConn)
 
 	if !(isSecret || isPrivate) {
 		return true

irc/reply.go

@@ -249,13 +249,13 @@ func (target *Client) RplRehashing() {
 
 func (target *Client) RplWhois(client *Client) {
 	target.RplWhoisUser(client)
-	if client.flags[Operator] {
+	if client.modes.Has(Operator) {
 		target.RplWhoisOperator(client)
 	}
 	target.RplWhoisIdle(client)
 	target.RplWhoisChannels(client)
 
-	if client.flags[SecureConn] {
+	if client.modes.Has(SecureConn) {
 		target.RplWhoisSecure(client)
 	}
 	target.RplWhoisServer(client)
@@ -266,7 +266,7 @@ func (target *Client) RplWhois(client *Client) {
 func (target *Client) RplWhoisUser(client *Client) {
 	var clientHost Name
 
-	if target.flags[Operator] || !client.flags[HostMask] {
+	if target.modes.Has(Operator) || !client.modes.Has(HostMask) {
 		clientHost = client.hostname
 	} else {
 		clientHost = client.hostmask
@@ -342,7 +342,7 @@ func (target *Client) RplChannelModeIs(channel *Channel) {
 func (target *Client) RplWhoReply(channel *Channel, client *Client) {
 	var clientHost Name
 
-	if target.flags[Operator] || !client.flags[HostMask] {
+	if target.modes.Has(Operator) || !client.modes.Has(HostMask) {
 		clientHost = client.hostname
 	} else {
 		clientHost = client.hostmask
@@ -351,12 +351,12 @@ func (target *Client) RplWhoReply(channel *Channel, client *Client) {
 	channelName := "*"
 	flags := ""
 
-	if client.flags[Away] {
+	if client.modes.Has(Away) {
 		flags = "G"
 	} else {
 		flags = "H"
 	}
-	if client.flags[Operator] {
+	if client.modes.Has(Operator) {
 		flags += "*"
 	}
 
@@ -579,7 +579,7 @@ func (target *Client) RplLUserChannels() {
 func (target *Client) RplLUserOp() {
 	nOperators := 0
 	target.server.clients.Range(func(_ Name, client *Client) bool {
-		if client.flags[Operator] {
+		if client.modes.Has(Operator) {
 			nOperators++
 		}
 		return true
@@ -610,7 +610,7 @@ func (target *Client) RplLUserMe() {
 func (target *Client) RplWhoWasUser(whoWas *WhoWas) {
 	var whoWasHost Name
 
-	if target.flags[Operator] {
+	if target.modes.Has(Operator) {
 		whoWasHost = whoWas.hostname
 	} else {
 		whoWasHost = whoWas.hostmask

irc/server.go

@@ -173,7 +173,7 @@ func NewServer(config *Config) *Server {
 func (server *Server) Wallops(message string) {
 	text := NewText(message)
 	server.clients.Range(func(_ Name, client *Client) bool {
-		if client.flags[WallOps] {
+		if client.modes.Has(WallOps) {
 			server.metrics.Counter("client", "messages").Inc()
 			client.replies <- RplNotice(server, client, text)
 		}
@@ -408,7 +408,7 @@ func (msg *RFC2812UserCommand) HandleRegServer(server *Server) {
 	flags := msg.Flags()
 	if len(flags) > 0 {
 		for _, mode := range flags {
-			client.flags[mode] = true
+			client.modes.Set(mode)
 		}
 		client.RplUModeIs(client)
 	}
@@ -495,7 +495,7 @@ func (msg *AuthenticateCommand) HandleRegServer(server *Server) {
 	client.RplLoggedIn(authcid)
 	client.RplSaslSuccess()
 
-	client.flags[Registered] = true
+	client.modes.Set(Registered)
 	client.Reply(
 		RplModeChanges(
 			client, client,
@@ -624,7 +624,7 @@ func (msg *PrivMsgCommand) HandleServer(server *Server) {
 	}
 	server.metrics.Counter("client", "messages").Inc()
 	target.Reply(RplPrivMsg(client, target, msg.message))
-	if target.flags[Away] {
+	if target.modes.Has(Away) {
 		client.RplAway(target)
 	}
 }
@@ -673,7 +673,7 @@ func (m *WhoisCommand) HandleServer(server *Server) {
 
 func whoChannel(client *Client, channel *Channel, friends *ClientSet) {
 	channel.members.Range(func(member *Client, _ *ChannelModeSet) bool {
-		if !client.flags[Invisible] || friends.Has(client) {
+		if !client.modes.Has(Invisible) || friends.Has(client) {
 			client.RplWhoReply(channel, member)
 		}
 		return true
@@ -715,8 +715,8 @@ func (msg *OperCommand) HandleServer(server *Server) {
 		return
 	}
 
-	client.flags[Operator] = true
-	client.flags[WallOps] = true
+	client.modes.Set(Operator)
+	client.modes.Set(WallOps)
 	client.RplYoureOper()
 	client.Reply(
 		RplModeChanges(
@@ -731,7 +731,7 @@ func (msg *OperCommand) HandleServer(server *Server) {
 
 func (msg *RehashCommand) HandleServer(server *Server) {
 	client := msg.Client()
-	if !client.flags[Operator] {
+	if !client.modes.Has(Operator) {
 		client.ErrNoPrivileges()
 		return
 	}
@@ -756,9 +756,9 @@ func (msg *RehashCommand) HandleServer(server *Server) {
 func (msg *AwayCommand) HandleServer(server *Server) {
 	client := msg.Client()
 	if len(msg.text) > 0 {
-		client.flags[Away] = true
+		client.modes.Set(Away)
 	} else {
-		delete(client.flags, Away)
+		client.modes.Unset(Away)
 	}
 	client.awayMessage = msg.text
 }
@@ -783,7 +783,7 @@ func (msg *MOTDCommand) HandleServer(server *Server) {
 func (msg *NoticeCommand) HandleServer(server *Server) {
 	client := msg.Client()
 
-	if msg.target == "*" && client.flags[Operator] {
+	if msg.target == "*" && client.modes.Has(Operator) {
 		server.Global(msg.message.String())
 		return
 	}
@@ -932,7 +932,7 @@ func (msg *LUsersCommand) HandleServer(server *Server) {
 
 func (msg *WallopsCommand) HandleServer(server *Server) {
 	client := msg.Client()
-	if !client.flags[Operator] {
+	if !client.modes.Has(Operator) {
 		client.ErrNoPrivileges()
 		return
 	}
@@ -942,7 +942,7 @@ func (msg *WallopsCommand) HandleServer(server *Server) {
 
 func (msg *KillCommand) HandleServer(server *Server) {
 	client := msg.Client()
-	if !client.flags[Operator] {
+	if !client.modes.Has(Operator) {
 		client.ErrNoPrivileges()
 		return
 	}

irc/types.go

@@ -94,6 +94,67 @@ func (c *ChannelNameMap) Remove(channel *Channel) error {
 	return nil
 }
 
+// UserModeSet holds a mapping of channel modes
+type UserModeSet struct {
+	sync.RWMutex
+	modes map[UserMode]bool
+}
+
+// NewUserModeSet returns a new UserModeSet
+func NewUserModeSet() *UserModeSet {
+	return &UserModeSet{modes: make(map[UserMode]bool)}
+}
+
+// Set sets mode
+func (set *UserModeSet) Set(mode UserMode) {
+	set.Lock()
+	defer set.Unlock()
+	set.modes[mode] = true
+}
+
+// Unset unsets mode
+func (set *UserModeSet) Unset(mode UserMode) {
+	set.Lock()
+	defer set.Unlock()
+	delete(set.modes, mode)
+}
+
+// Has returns true if the mode is set
+func (set *UserModeSet) Has(mode UserMode) bool {
+	set.RLock()
+	defer set.RUnlock()
+	ok, _ := set.modes[mode]
+	return ok
+}
+
+// Range ranges of the modes calling f
+func (set *UserModeSet) Range(f func(mode UserMode) bool) {
+	set.RLock()
+	defer set.RUnlock()
+	for mode := range set.modes {
+		if !f(mode) {
+			return
+		}
+	}
+}
+
+// String returns a string representing the channel modes
+func (set *UserModeSet) String() string {
+	set.RLock()
+	defer set.RUnlock()
+
+	if len(set.modes) == 0 {
+		return ""
+	}
+	strs := make([]string, len(set.modes))
+	index := 0
+	for mode := range set.modes {
+		strs[index] = mode.String()
+		index++
+	}
+	return strings.Join(strs, "")
+}
+
 // ChannelModeSet holds a mapping of channel modes
 type ChannelModeSet struct {
 	sync.RWMutex