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LICENSE

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+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
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+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    A URL Shortener called Link.
+    Copyright (C) 2021 i@fsh.ee
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.

README

@@ -0,0 +1 @@
+https://fsh.ee/

go.mod

@@ -0,0 +1,8 @@
+module git.fsh.ee/i/link
+
+go 1.16
+
+require (
+	gorm.io/driver/sqlite v1.1.4
+	gorm.io/gorm v1.21.9
+)

go.sum

@@ -0,0 +1,12 @@
+github.com/jinzhu/inflection v1.0.0 h1:K317FqzuhWc8YvSVlFMCCUb36O/S9MCKRDI7QkRKD/E=
+github.com/jinzhu/inflection v1.0.0/go.mod h1:h+uFLlag+Qp1Va5pdKtLDYj+kHp5pxUVkryuEj+Srlc=
+github.com/jinzhu/now v1.1.1/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
+github.com/jinzhu/now v1.1.2 h1:eVKgfIdy9b6zbWBMgFpfDPoAMifwSZagU9HmEU6zgiI=
+github.com/jinzhu/now v1.1.2/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
+github.com/mattn/go-sqlite3 v1.14.5 h1:1IdxlwTNazvbKJQSxoJ5/9ECbEeaTTyeU7sEAZ5KKTQ=
+github.com/mattn/go-sqlite3 v1.14.5/go.mod h1:WVKg1VTActs4Qso6iwGbiFih2UIHo0ENGwNd0Lj+XmI=
+gorm.io/driver/sqlite v1.1.4 h1:PDzwYE+sI6De2+mxAneV9Xs11+ZyKV6oxD3wDGkaNvM=
+gorm.io/driver/sqlite v1.1.4/go.mod h1:mJCeTFr7+crvS+TRnWc5Z3UvwxUN1BGBLMrf5LA9DYw=
+gorm.io/gorm v1.20.7/go.mod h1:0HFTzE/SqkGTzK6TlDPPQbAYCluiVvhzoA1+aVyzenw=
+gorm.io/gorm v1.21.9 h1:INieZtn4P2Pw6xPJ8MzT0G4WUOsHq3RhfuDF1M6GW0E=
+gorm.io/gorm v1.21.9/go.mod h1:F+OptMscr0P2F2qU97WT1WimdH9GaQPoDW7AYd5i2Y0=

index.html

@@ -0,0 +1,81 @@
+<!DOCTYPE html>
+<html lang=en>
+	<head>
+		<title>A Minimal, SQLite-Backed URL Shortener</title>
+		<meta charset='utf-8'>
+		<meta http-equiv='X-UA-Compatible' content='IE=edge,chrome=1'>
+		<meta http-equiv='Content-Type' content='text/html; charset=utf-8'>
+		<meta name='viewport' content='width=device-width, initial-scale=1'>
+		<meta content='A minimal, SQLite backed URL shortener. Made with Go, Vim, and FreeBSD.' name='description'>
+	</head>
+	<body style='font-family: monospace; max-width: 80ch;'>
+
+<header>
+A Minimal, SQLite-Backed URL Shortener
+</header>
+
+<style>
+@media (max-width: 1000px) {
+	pre code {
+		display: block;
+		max-width: 100%%;
+		overflow-x: auto;
+		-webkit-overflow-scrolling: touch;
+		padding: 0 5px 5px 0;
+	}
+}
+</style>
+
+<pre><code>| Examples:
+| 
+| 1. Create a short link to https://duckduckgo.com
+| 	$ curl -d https://duckduckgo.com %s
+| 	%s/502fb5543c36014f
+| 
+| 2. Deleting a short link
+| 	$ TMP=$(mktemp)
+| 	$ # temp file will store header
+| 	$ LINK=$(curl -sS %s -d https://duckduckgo.com -D $TMP)
+| 	$ # the link has been successfully created
+| 	$ DEL=$(cat $TMP | grep -i delete-with | awk '{print$2}'| tr -d '\r')
+| 	$ # deletion key is stored in 'X-Delete-With' header.
+| 	$ curl $LINK
+| 	&lt;a href=&quot;https://duckduckgo.com&quot;&gt;Permanent Redirect&lt;/a&gt;.
+| 	$ # the link is working as expected
+| 	$ curl $LINK -X DELETE -d $DEL
+| 	$ curl $LINK
+| 	record not found
+| 	$ # the link has been successfully deleted.</code></pre>
+		
+<p>
+Please note: this is an example deployment. If you attempt to create a short 
+link here you will receive a 401 Unauthorized. If you like the examples above
+and want to use this URL shortener you should self-host an instance. It's easy
+to do (one of the design goals). Below are instructions detailing how.
+<p>
+		
+<pre><code>| How to self-host:
+| 
+| 1. Install dependencies:
+| 	a. The Go programming language:
+| 		<a href='https://golang.org/doc/install'>https://golang.org/doc/install</a>
+| 	b. Git version control.
+| 		<a href='https://git-scm.com/book/en/v2/Getting-Started-Installing-Git'>https://git-scm.com/book/en/v2/Getting-Started-Installing-Git</a>
+| 
+| 	* On FreeBSD this would be: 
+| 		$ pkg install -y go git 
+| 
+| 2. Fetch, complile, and execute the source code:
+| 	$ env GO111MODULE=off go get git.fsh.ee/i/link
+| 	$ env GO111MODULE=off go run git.fsh.ee/i/link -url https://your.domain.com -port 8080 -db /path/to/sqlite/file -seed secret
+| 
+| * The server is now running on localhost at port 8080.
+| * If the SQLite database at this filepath does not exist it will be created.
+| * All logging will be printed to standard error and standard output.</code></pre>
+		
+<footer style='white-space: pre;'>Source code: 	<a href='https://fsh.ee/src'>fsh.ee/src</a>
+License:	AGPL v3
+Copy: 		2021 i@fsh.ee
+Made with:	Go, Vim, and FreeBSD
+Unrelated blog:	<a href='https://etc.fsh.ee/'>etc.fsh.ee</a>
+</footer>

main.go

@@ -0,0 +1,253 @@
+// A URL Shortener called Link.
+// Copyright (C) 2021 i@fsh.ee
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+package main
+
+import (
+	"crypto/md5"
+	_ "embed"
+	"errors"
+	"flag"
+	"fmt"
+	"hash/maphash"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"net/url"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
+)
+
+//go:embed index.html
+var indexTemplate string
+
+type DB struct {
+	*gorm.DB
+	log      *log.Logger
+	hashSeed string
+}
+
+func NewDB(l *log.Logger, dbFilePath, hashSeed string) (DB, error) {
+	_, err := os.Stat(dbFilePath)
+	if os.IsNotExist(err) {
+		err := ioutil.WriteFile(dbFilePath, []byte{}, 0600)
+		if err != nil {
+			return DB{}, err
+		}
+	}
+	db, err := gorm.Open(sqlite.Open(dbFilePath), &gorm.Config{
+		NowFunc: func() time.Time { return time.Now().UTC() },
+		Logger:  logger.Default.LogMode(logger.Silent),
+	})
+	if err != nil {
+		return DB{}, err
+	}
+	return DB{db, l, hashSeed}, db.AutoMigrate(&Link{})
+}
+
+type Link struct {
+	gorm.Model
+	Big  string
+	Smol string `gorm:"unique"`
+	Del  string `gorm:"unique"`
+}
+
+func (db DB) getHashShortLink(s fmt.Stringer) string {
+	h := maphash.Hash{}
+	h.WriteString(s.String())
+	return strings.TrimSpace(strings.TrimLeft(fmt.Sprintf("%#x\n", h.Sum64()), "0x"))
+}
+
+func (db DB) getHashDeleteKey(s fmt.Stringer) string {
+	return strings.TrimSpace(fmt.Sprintf("%x", md5.Sum([]byte(db.hashSeed+s.String()+strconv.FormatInt(time.Now().Unix(), 10)))))
+}
+
+func (db DB) NewLink(u *url.URL) (Link, error) {
+	return db.NewLinkWithShortLink(u, db.getHashShortLink(u))
+}
+
+func (db DB) NewLinkWithShortLink(u *url.URL, hash string) (Link, error) {
+	var (
+		link = Link{Big: u.String(), Smol: hash, Del: db.getHashDeleteKey(u)}
+		err  = db.Create(&link).Error
+	)
+	// TODO: If error due to unique issue should attempt to retry a few times.
+	if err != nil {
+		db.log.Println(err)
+		return Link{}, err
+	}
+	return link, nil
+}
+
+func (db DB) GetLink(smol string) (l Link, e error) {
+	res := db.Where(&Link{Smol: smol}).First(&l)
+	return l, res.Error
+}
+
+func (db DB) DelLink(smol, del string) error {
+	link, err := db.GetLink(smol)
+	if err != nil {
+		return err
+	}
+	res := db.Where(&Link{Del: del}).Delete(&link)
+	if res.RowsAffected < 1 {
+		return gorm.ErrRecordNotFound
+	}
+	return res.Error
+}
+
+type controller struct {
+	log *log.Logger
+	db  DB
+	url string
+}
+
+func NewController(logger *log.Logger, db DB, url string) controller {
+	return controller{logger, db, strings.TrimRight(url, "/")}
+}
+
+func (c controller) Err(rw http.ResponseWriter, r *http.Request, err error) {
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		rw.WriteHeader(http.StatusNotFound)
+		rw.Write([]byte(err.Error()))
+		return
+	}
+	c.log.Println(err)
+	rw.WriteHeader(http.StatusInternalServerError)
+	rw.Write([]byte(err.Error()))
+}
+
+func (c controller) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
+	switch r.Method {
+
+	case http.MethodGet:
+		switch strings.TrimRight(r.URL.Path, "/") {
+
+		case "":
+			rw.Header().Add("Content-Type", "text/html")
+			rw.Write([]byte(fmt.Sprintf(indexTemplate, c.url, c.url, c.url)))
+			return
+
+		case "/favicon.ico":
+			http.NotFound(rw, r)
+			return
+
+		default:
+			link, err := c.db.GetLink(strings.TrimLeft(r.URL.Path, "/"))
+			if err != nil {
+				c.Err(rw, r, err)
+				return
+			}
+			http.Redirect(rw, r, link.Big, http.StatusPermanentRedirect)
+			return
+
+		}
+
+	case http.MethodPost:
+		b, err := ioutil.ReadAll(r.Body)
+		if err != nil {
+			c.Err(rw, r, err)
+			return
+		}
+		u, err := url.Parse(string(b))
+		if err != nil {
+			c.Err(rw, r, err)
+			return
+		}
+		if u.Scheme != "http" && u.Scheme != "https" {
+			rw.WriteHeader(http.StatusBadRequest)
+			rw.Write([]byte("URL must contain scheme. E.G. missing `http://` or `https://`."))
+			return
+		}
+		var (
+			link Link
+			h    = strings.Trim(r.URL.Path, "/")
+		)
+		if h != "" {
+			link, err = c.db.NewLinkWithShortLink(u, h)
+
+		} else {
+			link, err = c.db.NewLink(u)
+		}
+		if err != nil {
+			c.Err(rw, r, err)
+			return
+		}
+		rw.Header().Set("X-Delete-With", link.Del)
+		rw.WriteHeader(http.StatusFound)
+		rw.Write([]byte(fmt.Sprintf("%s/%s", c.url, link.Smol)))
+		return
+
+	case http.MethodDelete:
+		b, err := ioutil.ReadAll(r.Body)
+		if err != nil {
+			c.Err(rw, r, err)
+			return
+		}
+		if len(b) < 1 {
+			rw.WriteHeader(http.StatusBadRequest)
+			rw.Write([]byte("Must include deletion key in DELETE body."))
+			return
+		}
+		var (
+			smol = strings.TrimSpace(strings.TrimLeft(r.URL.Path, "/"))
+			del  = strings.TrimSpace(string(b))
+		)
+		if err := c.db.DelLink(smol, del); err != nil {
+			c.Err(rw, r, err)
+			return
+		}
+		rw.WriteHeader(http.StatusNoContent)
+		return
+
+	}
+
+	http.NotFound(rw, r)
+}
+
+func main() {
+	var (
+		logPrefix         = "link: "
+		startupLogger     = log.New(os.Stdout, logPrefix, 0)
+		applicationLogger = log.New(ioutil.Discard, logPrefix, 0)
+		v                 = flag.Bool("v", false, "verbose logging")
+		port              = flag.Uint("port", 8080, "port to listen on")
+		dbFilePath        = flag.String("db", "", "sqlite database filepath: required")
+		url               = flag.String("url", "", "service url: required")
+		hashSeed          = flag.String("seed", "", "hash seed: required")
+	)
+	flag.Parse()
+	if *dbFilePath == "" || *url == "" || *hashSeed == "" {
+		flag.Usage()
+		return
+	}
+	if *v {
+		applicationLogger = log.New(os.Stdout, logPrefix, 0)
+	}
+	db, err := NewDB(applicationLogger, *dbFilePath, *hashSeed)
+	if err != nil {
+		startupLogger.Fatal(err)
+		return
+	}
+	http.Handle("/", NewController(applicationLogger, db, *url))
+	startupLogger.Println("listening on port", *port)
+	startupLogger.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", *port), nil))
+}

makefile

@@ -0,0 +1,28 @@
+BIN=out
+CC=go1.16
+
+all: setup vendor gen build
+
+setup:
+	@env GOOD=off go get golang.org/dl/go1.16
+	@env GOOD=off $(CC) download
+
+vendor: go.mod go.sum
+	@$(CC) mod tidy
+	@$(CC) mod vendor
+
+build:
+	@$(CC) build -ldflags='-s -w' -o $(BIN)
+
+gen: 
+	@$(CC) generate ./...
+
+test: 
+	@env $(ENV) $(CC) test ./... -cover -count 1
+
+run: gen build
+	@clear
+	@env $(ENV) ./$(BIN) -v -url https://dev.fsh.ee -port 8080 -db /tmp/link_test_db_1.sql -seed secret
+
+dev:
+	@find . -type f | grep -E '(.*)\.(go|html)' | entr -cr make run

vendor/github.com/jinzhu/inflection/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 - Jinzhu
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/jinzhu/inflection/README.md

@@ -0,0 +1,55 @@
+# Inflection
+
+Inflection pluralizes and singularizes English nouns
+
+[![wercker status](https://app.wercker.com/status/f8c7432b097d1f4ce636879670be0930/s/master "wercker status")](https://app.wercker.com/project/byKey/f8c7432b097d1f4ce636879670be0930)
+
+## Basic Usage
+
+```go
+inflection.Plural("person") => "people"
+inflection.Plural("Person") => "People"
+inflection.Plural("PERSON") => "PEOPLE"
+inflection.Plural("bus")    => "buses"
+inflection.Plural("BUS")    => "BUSES"
+inflection.Plural("Bus")    => "Buses"
+
+inflection.Singular("people") => "person"
+inflection.Singular("People") => "Person"
+inflection.Singular("PEOPLE") => "PERSON"
+inflection.Singular("buses")  => "bus"
+inflection.Singular("BUSES")  => "BUS"
+inflection.Singular("Buses")  => "Bus"
+
+inflection.Plural("FancyPerson") => "FancyPeople"
+inflection.Singular("FancyPeople") => "FancyPerson"
+```
+
+## Register Rules
+
+Standard rules are from Rails's ActiveSupport (https://github.com/rails/rails/blob/master/activesupport/lib/active_support/inflections.rb)
+
+If you want to register more rules, follow:
+
+```
+inflection.AddUncountable("fish")
+inflection.AddIrregular("person", "people")
+inflection.AddPlural("(bu)s$", "${1}ses") # "bus" => "buses" / "BUS" => "BUSES" / "Bus" => "Buses"
+inflection.AddSingular("(bus)(es)?$", "${1}") # "buses" => "bus" / "Buses" => "Bus" / "BUSES" => "BUS"
+```
+
+## Contributing
+
+You can help to make the project better, check out [http://gorm.io/contribute.html](http://gorm.io/contribute.html) for things you can do.
+
+## Author
+
+**jinzhu**
+
+* <http://github.com/jinzhu>
+* <wosmvp@gmail.com>
+* <http://twitter.com/zhangjinzhu>
+
+## License
+
+Released under the [MIT License](http://www.opensource.org/licenses/MIT).

vendor/github.com/jinzhu/inflection/go.mod

@@ -0,0 +1 @@
+module github.com/jinzhu/inflection

vendor/github.com/jinzhu/inflection/inflections.go

@@ -0,0 +1,273 @@
+/*
+Package inflection pluralizes and singularizes English nouns.
+
+		inflection.Plural("person") => "people"
+		inflection.Plural("Person") => "People"
+		inflection.Plural("PERSON") => "PEOPLE"
+
+		inflection.Singular("people") => "person"
+		inflection.Singular("People") => "Person"
+		inflection.Singular("PEOPLE") => "PERSON"
+
+		inflection.Plural("FancyPerson") => "FancydPeople"
+		inflection.Singular("FancyPeople") => "FancydPerson"
+
+Standard rules are from Rails's ActiveSupport (https://github.com/rails/rails/blob/master/activesupport/lib/active_support/inflections.rb)
+
+If you want to register more rules, follow:
+
+		inflection.AddUncountable("fish")
+		inflection.AddIrregular("person", "people")
+		inflection.AddPlural("(bu)s$", "${1}ses") # "bus" => "buses" / "BUS" => "BUSES" / "Bus" => "Buses"
+		inflection.AddSingular("(bus)(es)?$", "${1}") # "buses" => "bus" / "Buses" => "Bus" / "BUSES" => "BUS"
+*/
+package inflection
+
+import (
+	"regexp"
+	"strings"
+)
+
+type inflection struct {
+	regexp  *regexp.Regexp
+	replace string
+}
+
+// Regular is a regexp find replace inflection
+type Regular struct {
+	find    string
+	replace string
+}
+
+// Irregular is a hard replace inflection,
+// containing both singular and plural forms
+type Irregular struct {
+	singular string
+	plural   string
+}
+
+// RegularSlice is a slice of Regular inflections
+type RegularSlice []Regular
+
+// IrregularSlice is a slice of Irregular inflections
+type IrregularSlice []Irregular
+
+var pluralInflections = RegularSlice{
+	{"([a-z])$", "${1}s"},
+	{"s$", "s"},
+	{"^(ax|test)is$", "${1}es"},
+	{"(octop|vir)us$", "${1}i"},
+	{"(octop|vir)i$", "${1}i"},
+	{"(alias|status)$", "${1}es"},
+	{"(bu)s$", "${1}ses"},
+	{"(buffal|tomat)o$", "${1}oes"},
+	{"([ti])um$", "${1}a"},
+	{"([ti])a$", "${1}a"},
+	{"sis$", "ses"},
+	{"(?:([^f])fe|([lr])f)$", "${1}${2}ves"},
+	{"(hive)$", "${1}s"},
+	{"([^aeiouy]|qu)y$", "${1}ies"},
+	{"(x|ch|ss|sh)$", "${1}es"},
+	{"(matr|vert|ind)(?:ix|ex)$", "${1}ices"},
+	{"^(m|l)ouse$", "${1}ice"},
+	{"^(m|l)ice$", "${1}ice"},
+	{"^(ox)$", "${1}en"},
+	{"^(oxen)$", "${1}"},
+	{"(quiz)$", "${1}zes"},
+}
+
+var singularInflections = RegularSlice{
+	{"s$", ""},
+	{"(ss)$", "${1}"},
+	{"(n)ews$", "${1}ews"},
+	{"([ti])a$", "${1}um"},
+	{"((a)naly|(b)a|(d)iagno|(p)arenthe|(p)rogno|(s)ynop|(t)he)(sis|ses)$", "${1}sis"},
+	{"(^analy)(sis|ses)$", "${1}sis"},
+	{"([^f])ves$", "${1}fe"},
+	{"(hive)s$", "${1}"},
+	{"(tive)s$", "${1}"},
+	{"([lr])ves$", "${1}f"},
+	{"([^aeiouy]|qu)ies$", "${1}y"},
+	{"(s)eries$", "${1}eries"},
+	{"(m)ovies$", "${1}ovie"},
+	{"(c)ookies$", "${1}ookie"},
+	{"(x|ch|ss|sh)es$", "${1}"},
+	{"^(m|l)ice$", "${1}ouse"},
+	{"(bus)(es)?$", "${1}"},
+	{"(o)es$", "${1}"},
+	{"(shoe)s$", "${1}"},
+	{"(cris|test)(is|es)$", "${1}is"},
+	{"^(a)x[ie]s$", "${1}xis"},
+	{"(octop|vir)(us|i)$", "${1}us"},
+	{"(alias|status)(es)?$", "${1}"},
+	{"^(ox)en", "${1}"},
+	{"(vert|ind)ices$", "${1}ex"},
+	{"(matr)ices$", "${1}ix"},
+	{"(quiz)zes$", "${1}"},
+	{"(database)s$", "${1}"},
+}
+
+var irregularInflections = IrregularSlice{
+	{"person", "people"},
+	{"man", "men"},
+	{"child", "children"},
+	{"sex", "sexes"},
+	{"move", "moves"},
+	{"mombie", "mombies"},
+}
+
+var uncountableInflections = []string{"equipment", "information", "rice", "money", "species", "series", "fish", "sheep", "jeans", "police"}
+
+var compiledPluralMaps []inflection
+var compiledSingularMaps []inflection
+
+func compile() {
+	compiledPluralMaps = []inflection{}
+	compiledSingularMaps = []inflection{}
+	for _, uncountable := range uncountableInflections {
+		inf := inflection{
+			regexp:  regexp.MustCompile("^(?i)(" + uncountable + ")$"),
+			replace: "${1}",
+		}
+		compiledPluralMaps = append(compiledPluralMaps, inf)
+		compiledSingularMaps = append(compiledSingularMaps, inf)
+	}
+
+	for _, value := range irregularInflections {
+		infs := []inflection{
+			inflection{regexp: regexp.MustCompile(strings.ToUpper(value.singular) + "$"), replace: strings.ToUpper(value.plural)},
+			inflection{regexp: regexp.MustCompile(strings.Title(value.singular) + "$"), replace: strings.Title(value.plural)},
+			inflection{regexp: regexp.MustCompile(value.singular + "$"), replace: value.plural},
+		}
+		compiledPluralMaps = append(compiledPluralMaps, infs...)
+	}
+
+	for _, value := range irregularInflections {
+		infs := []inflection{
+			inflection{regexp: regexp.MustCompile(strings.ToUpper(value.plural) + "$"), replace: strings.ToUpper(value.singular)},
+			inflection{regexp: regexp.MustCompile(strings.Title(value.plural) + "$"), replace: strings.Title(value.singular)},
+			inflection{regexp: regexp.MustCompile(value.plural + "$"), replace: value.singular},
+		}
+		compiledSingularMaps = append(compiledSingularMaps, infs...)
+	}
+
+	for i := len(pluralInflections) - 1; i >= 0; i-- {
+		value := pluralInflections[i]
+		infs := []inflection{
+			inflection{regexp: regexp.MustCompile(strings.ToUpper(value.find)), replace: strings.ToUpper(value.replace)},
+			inflection{regexp: regexp.MustCompile(value.find), replace: value.replace},
+			inflection{regexp: regexp.MustCompile("(?i)" + value.find), replace: value.replace},
+		}
+		compiledPluralMaps = append(compiledPluralMaps, infs...)
+	}
+
+	for i := len(singularInflections) - 1; i >= 0; i-- {
+		value := singularInflections[i]
+		infs := []inflection{
+			inflection{regexp: regexp.MustCompile(strings.ToUpper(value.find)), replace: strings.ToUpper(value.replace)},
+			inflection{regexp: regexp.MustCompile(value.find), replace: value.replace},
+			inflection{regexp: regexp.MustCompile("(?i)" + value.find), replace: value.replace},
+		}
+		compiledSingularMaps = append(compiledSingularMaps, infs...)
+	}
+}
+
+func init() {
+	compile()
+}
+
+// AddPlural adds a plural inflection
+func AddPlural(find, replace string) {
+	pluralInflections = append(pluralInflections, Regular{find, replace})
+	compile()
+}
+
+// AddSingular adds a singular inflection
+func AddSingular(find, replace string) {
+	singularInflections = append(singularInflections, Regular{find, replace})
+	compile()
+}
+
+// AddIrregular adds an irregular inflection
+func AddIrregular(singular, plural string) {
+	irregularInflections = append(irregularInflections, Irregular{singular, plural})
+	compile()
+}
+
+// AddUncountable adds an uncountable inflection
+func AddUncountable(values ...string) {
+	uncountableInflections = append(uncountableInflections, values...)
+	compile()
+}
+
+// GetPlural retrieves the plural inflection values
+func GetPlural() RegularSlice {
+	plurals := make(RegularSlice, len(pluralInflections))
+	copy(plurals, pluralInflections)
+	return plurals
+}
+
+// GetSingular retrieves the singular inflection values
+func GetSingular() RegularSlice {
+	singulars := make(RegularSlice, len(singularInflections))
+	copy(singulars, singularInflections)
+	return singulars
+}
+
+// GetIrregular retrieves the irregular inflection values
+func GetIrregular() IrregularSlice {
+	irregular := make(IrregularSlice, len(irregularInflections))
+	copy(irregular, irregularInflections)
+	return irregular
+}
+
+// GetUncountable retrieves the uncountable inflection values
+func GetUncountable() []string {
+	uncountables := make([]string, len(uncountableInflections))
+	copy(uncountables, uncountableInflections)
+	return uncountables
+}
+
+// SetPlural sets the plural inflections slice
+func SetPlural(inflections RegularSlice) {
+	pluralInflections = inflections
+	compile()
+}
+
+// SetSingular sets the singular inflections slice
+func SetSingular(inflections RegularSlice) {
+	singularInflections = inflections
+	compile()
+}
+
+// SetIrregular sets the irregular inflections slice
+func SetIrregular(inflections IrregularSlice) {
+	irregularInflections = inflections
+	compile()
+}
+
+// SetUncountable sets the uncountable inflections slice
+func SetUncountable(inflections []string) {
+	uncountableInflections = inflections
+	compile()
+}
+
+// Plural converts a word to its plural form
+func Plural(str string) string {
+	for _, inflection := range compiledPluralMaps {
+		if inflection.regexp.MatchString(str) {
+			return inflection.regexp.ReplaceAllString(str, inflection.replace)
+		}
+	}
+	return str
+}
+
+// Singular converts a word to its singular form
+func Singular(str string) string {
+	for _, inflection := range compiledSingularMaps {
+		if inflection.regexp.MatchString(str) {
+			return inflection.regexp.ReplaceAllString(str, inflection.replace)
+		}
+	}
+	return str
+}

vendor/github.com/jinzhu/inflection/wercker.yml

@@ -0,0 +1,23 @@
+box: golang
+
+build:
+  steps:
+    - setup-go-workspace
+
+    # Gets the dependencies
+    - script:
+        name: go get
+        code: |
+          go get
+
+    # Build the project
+    - script:
+        name: go build
+        code: |
+          go build ./...
+
+    # Test the project
+    - script:
+        name: go test
+        code: |
+          go test ./...

vendor/github.com/jinzhu/now/Guardfile

@@ -0,0 +1,3 @@
+guard 'gotest' do
+  watch(%r{\.go$})
+end

vendor/github.com/jinzhu/now/License

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2013-NOW  Jinzhu <wosmvp@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/github.com/jinzhu/now/README.md

@@ -0,0 +1,131 @@
+## Now
+
+Now is a time toolkit for golang
+
+[![wercker status](https://app.wercker.com/status/a350da4eae6cb28a35687ba41afb565a/s/master "wercker status")](https://app.wercker.com/project/byKey/a350da4eae6cb28a35687ba41afb565a)
+
+## Install
+
+```
+go get -u github.com/jinzhu/now
+```
+
+## Usage
+
+Calculating time based on current time
+
+```go
+import "github.com/jinzhu/now"
+
+time.Now() // 2013-11-18 17:51:49.123456789 Mon
+
+now.BeginningOfMinute()        // 2013-11-18 17:51:00 Mon
+now.BeginningOfHour()          // 2013-11-18 17:00:00 Mon
+now.BeginningOfDay()           // 2013-11-18 00:00:00 Mon
+now.BeginningOfWeek()          // 2013-11-17 00:00:00 Sun
+now.BeginningOfMonth()         // 2013-11-01 00:00:00 Fri
+now.BeginningOfQuarter()       // 2013-10-01 00:00:00 Tue
+now.BeginningOfYear()          // 2013-01-01 00:00:00 Tue
+
+now.EndOfMinute()              // 2013-11-18 17:51:59.999999999 Mon
+now.EndOfHour()                // 2013-11-18 17:59:59.999999999 Mon
+now.EndOfDay()                 // 2013-11-18 23:59:59.999999999 Mon
+now.EndOfWeek()                // 2013-11-23 23:59:59.999999999 Sat
+now.EndOfMonth()               // 2013-11-30 23:59:59.999999999 Sat
+now.EndOfQuarter()             // 2013-12-31 23:59:59.999999999 Tue
+now.EndOfYear()                // 2013-12-31 23:59:59.999999999 Tue
+
+now.WeekStartDay = time.Monday // Set Monday as first day, default is Sunday
+now.EndOfWeek()                // 2013-11-24 23:59:59.999999999 Sun
+```
+
+Calculating time based on another time
+
+```go
+t := time.Date(2013, 02, 18, 17, 51, 49, 123456789, time.Now().Location())
+now.With(t).EndOfMonth()   // 2013-02-28 23:59:59.999999999 Thu
+```
+
+Calculating time based on configuration
+
+```go
+location, err := time.LoadLocation("Asia/Shanghai")
+
+myConfig := &now.Config{
+	WeekStartDay: time.Monday,
+	TimeLocation: location,
+	TimeFormats: []string{"2006-01-02 15:04:05"},
+}
+
+t := time.Date(2013, 11, 18, 17, 51, 49, 123456789, time.Now().Location()) // // 2013-11-18 17:51:49.123456789 Mon
+myConfig.With(t).BeginningOfWeek()         // 2013-11-18 00:00:00 Mon
+
+myConfig.Parse("2002-10-12 22:14:01")     // 2002-10-12 22:14:01
+myConfig.Parse("2002-10-12 22:14")        // returns error 'can't parse string as time: 2002-10-12 22:14'
+```
+
+### Monday/Sunday
+
+Don't be bothered with the `WeekStartDay` setting, you can use `Monday`, `Sunday`
+
+```go
+now.Monday()              // 2013-11-18 00:00:00 Mon
+now.Sunday()              // 2013-11-24 00:00:00 Sun (Next Sunday)
+now.EndOfSunday()         // 2013-11-24 23:59:59.999999999 Sun (End of next Sunday)
+
+t := time.Date(2013, 11, 24, 17, 51, 49, 123456789, time.Now().Location()) // 2013-11-24 17:51:49.123456789 Sun
+now.With(t).Monday()       // 2013-11-18 00:00:00 Sun (Last Monday if today is Sunday)
+now.With(t).Sunday()       // 2013-11-24 00:00:00 Sun (Beginning Of Today if today is Sunday)
+now.With(t).EndOfSunday()  // 2013-11-24 23:59:59.999999999 Sun (End of Today if today is Sunday)
+```
+
+### Parse String to Time
+
+```go
+time.Now() // 2013-11-18 17:51:49.123456789 Mon
+
+// Parse(string) (time.Time, error)
+t, err := now.Parse("2017")                // 2017-01-01 00:00:00, nil
+t, err := now.Parse("2017-10")             // 2017-10-01 00:00:00, nil
+t, err := now.Parse("2017-10-13")          // 2017-10-13 00:00:00, nil
+t, err := now.Parse("1999-12-12 12")       // 1999-12-12 12:00:00, nil
+t, err := now.Parse("1999-12-12 12:20")    // 1999-12-12 12:20:00, nil
+t, err := now.Parse("1999-12-12 12:20:21") // 1999-12-12 12:20:00, nil
+t, err := now.Parse("10-13")               // 2013-10-13 00:00:00, nil
+t, err := now.Parse("12:20")               // 2013-11-18 12:20:00, nil
+t, err := now.Parse("12:20:13")            // 2013-11-18 12:20:13, nil
+t, err := now.Parse("14")                  // 2013-11-18 14:00:00, nil
+t, err := now.Parse("99:99")               // 2013-11-18 12:20:00, Can't parse string as time: 99:99
+
+// MustParse must parse string to time or it will panic
+now.MustParse("2013-01-13")             // 2013-01-13 00:00:00
+now.MustParse("02-17")                  // 2013-02-17 00:00:00
+now.MustParse("2-17")                   // 2013-02-17 00:00:00
+now.MustParse("8")                      // 2013-11-18 08:00:00
+now.MustParse("2002-10-12 22:14")       // 2002-10-12 22:14:00
+now.MustParse("99:99")                  // panic: Can't parse string as time: 99:99
+```
+
+Extend `now` to support more formats is quite easy, just update `now.TimeFormats` with other time layouts, e.g:
+
+```go
+now.TimeFormats = append(now.TimeFormats, "02 Jan 2006 15:04")
+```
+
+Please send me pull requests if you want a format to be supported officially
+
+## Contributing
+
+You can help to make the project better, check out [http://gorm.io/contribute.html](http://gorm.io/contribute.html) for things you can do.
+
+# Author
+
+**jinzhu**
+
+* <http://github.com/jinzhu>
+* <wosmvp@gmail.com>
+* <http://twitter.com/zhangjinzhu>
+
+## License
+
+Released under the [MIT License](http://www.opensource.org/licenses/MIT).

vendor/github.com/jinzhu/now/go.mod

@@ -0,0 +1,3 @@
+module github.com/jinzhu/now
+
+go 1.12

vendor/github.com/jinzhu/now/main.go

@@ -0,0 +1,194 @@
+// Package now is a time toolkit for golang.
+//
+// More details README here: https://github.com/jinzhu/now
+//
+//  import "github.com/jinzhu/now"
+//
+//  now.BeginningOfMinute() // 2013-11-18 17:51:00 Mon
+//  now.BeginningOfDay()    // 2013-11-18 00:00:00 Mon
+//  now.EndOfDay()          // 2013-11-18 23:59:59.999999999 Mon
+package now
+
+import "time"
+
+// WeekStartDay set week start day, default is sunday
+var WeekStartDay = time.Sunday
+
+// TimeFormats default time formats will be parsed as
+var TimeFormats = []string{
+	"2006", "2006-1", "2006-1-2", "2006-1-2 15", "2006-1-2 15:4", "2006-1-2 15:4:5", "1-2",
+	"15:4:5", "15:4", "15",
+	"15:4:5 Jan 2, 2006 MST", "2006-01-02 15:04:05.999999999 -0700 MST", "2006-01-02T15:04:05-07:00",
+	"2006.1.2", "2006.1.2 15:04:05", "2006.01.02", "2006.01.02 15:04:05", "2006.01.02 15:04:05.999999999",
+	"1/2/2006", "1/2/2006 15:4:5", "2006/01/02", "2006/01/02 15:04:05",
+	time.ANSIC, time.UnixDate, time.RubyDate, time.RFC822, time.RFC822Z, time.RFC850,
+	time.RFC1123, time.RFC1123Z, time.RFC3339, time.RFC3339Nano,
+	time.Kitchen, time.Stamp, time.StampMilli, time.StampMicro, time.StampNano,
+}
+
+// Config configuration for now package
+type Config struct {
+	WeekStartDay time.Weekday
+	TimeLocation *time.Location
+	TimeFormats  []string
+}
+
+// DefaultConfig default config
+var DefaultConfig *Config
+
+// New initialize Now based on configuration
+func (config *Config) With(t time.Time) *Now {
+	return &Now{Time: t, Config: config}
+}
+
+// Parse parse string to time based on configuration
+func (config *Config) Parse(strs ...string) (time.Time, error) {
+	if config.TimeLocation == nil {
+		return config.With(time.Now()).Parse(strs...)
+	} else {
+		return config.With(time.Now().In(config.TimeLocation)).Parse(strs...)
+	}
+}
+
+// MustParse must parse string to time or will panic
+func (config *Config) MustParse(strs ...string) time.Time {
+	if config.TimeLocation == nil {
+		return config.With(time.Now()).MustParse(strs...)
+	} else {
+		return config.With(time.Now().In(config.TimeLocation)).MustParse(strs...)
+	}
+}
+