cowyo/utils.go

package main

import (
	"log"
	"math/rand"
	"sort"
	"strings"
	"time"

	"github.com/sergi/go-diff/diffmatchpatch"
)

var animals []string
var adjectives []string
var robotsTxt string
var aboutPageText string

type versionsInfo struct {
	VersionDate string
	VersionNum  int
}

func init() {
	rand.Seed(time.Now().Unix())
	animals = []string{"fawn", "peacock", "fox terrier", "civet", "musk deer", "seastar", "pigeon", "bull", "bumblebee", "crocodile", "flying squirrel", "elephant", "leopard seal", "baboon", "porcupine", "wolverine", "spider monkey", "vampire bat", "sparrow", "manatee", "possum", "swallow", "wildcat", "bandicoot", "labradoodle", "dragonfly", "tarsier", "snowy owl", "chameleon", "boykin", "puffin", "bison", "llama", "kitten", "stinkbug", "macaw", "parrot", "leopard cat", "prawn", "panther", "dogfish", "fennec", "frigatebird", "nurse shark", "turkey", "cockatoo", "neanderthal", "crow", "gopher", "reindeer", "earwig ", "anaconda", "panda", "ant", "silver fox", "collared peccary", "puppy", "common buzzard", "moose", "binturong", "wildebeest", "lovebird", "ferret", "persian", "marine toad", "woolly mammoth", "dalmatian", "bird", "umbrellabird", "kingfisher", "kangaroo", "stallion", "russian blue", "ostrich", "owl", "tawny owl", "affenpinscher", "caiman", "elephant seal", "octopus", "meerkat", "whale shark", "buck", "donkey", "red wolf", "mountain lion", "labrador retriever", "quetzal", "chamois", "sponge", "hamster", "orangutan", "sea urchin", "uakari", "doberman", "dormouse", "saint bernard", "bull shark", "ocelot", "sparrow", "spitz", "stoat", "snapping turtle", "dragonfly", "cougar", "alligator", "walrus", "glass lizard", "malayan tiger", "frog", "tiger", "armadillo", "chinchilla", "crab", "squid", "calf", "shrew", "dolphin", "royal penguin", "dingo", "turtle", "yellow-eyed penguin", "chimpanzee", "armadillo", "boa constrictor", "rabbit", "basking", "coyote", "chinook", "osprey", "sea lion", "fly", "sperm whale", "patas monkey", "tiffany", "mountain goat", "dodo", "worm", "cat", "warthog", "peccary", "shark", "pony", "monkey", "swan", "whippet", "beagle", "cougar", "anteater", "quail", "liger", "cheetah", "woodpecker", "egret", "eagle", "moose", "warthog", "honey bee", "snail", "stag beetle", "budgie", "molly", "magpie", "rhinoceros", "elephant", "kudu", "wombat", "tree frog", "goat", "lamb", "tropicbird", "human", "hog", "tang", "pool frog", "lemur", "ox", "dog", "lizard", "echidna", "great dane", "wallaby", "hawk", "dove", "jellyfish", "sloth", "macaque", "starfish", "sun bear", "guppy", "welsh corgi", "deer", "impala", "porpoise", "gazelle", "bichon", "seal", "wolf", "zebra shark", "mole", "narwhal", "hedgehog", "sheep", "horse", "bluetick", "colt", "spadefoot toad", "wildebeest", "piranha", "basenji", "mallard", "bull mastiff", "bear", "siberian husky", "bird", "badger", "red panda", "hammerhead", "rock hyrax", "kangaroo", "marsh frog", "mule", "weasel", "dogfish", "dachsbracke", "forest elephant", "oyster", "bat", "python", "coati", "platypus", "salamander", "cat", "caterpillar", "giraffe", "snake", "kid", "falcon", "robin", "guinea fowl", "tern", "sea lion", "dingo", "bolognese", "drake", "goose", "rat", "gentoo penguin", "iguana", "quail", "mouse", "horseshoe crab", "roebuck", "cattle dog", "fish", "poodle", "frog", "wolverine", "chinchilla", "bobcat", "grey seal", "hermit crab", "carolina", "shepherd", "gila monster", "snail", "mandrill", "leopard", "frilled lizard", "echidna", "rabbit", "bison", "barracuda", "foal", "ass", "eagle", "octopus", "avocet", "siamese", "dodo", "yorkie", "cockroach", "wallaroo", "tiger", "woodlouse", "glow worm", "fossa", "buffalo", "zorse", "albatross", "indri", "seahorse", "lemur", "louse", "ostrich", "humpback whale", "millipede", "fin whale", "joey", "pinscher", "dachshund", "proboscis monkey", "pelican", "chihuahua", "dogo", "indian rhinoceros", "wasp", "siberian", "raccoon dog", "yak", "stingray", "jack russel", "water vole", "foxhound", "sheep", "stork", "horse", "monkey", "woolly monkey", "waterbuck", "dunker", "cuscus", "ibis", "giraffe", "aardvark", "hummingbird", "grizzly bear", "otter", "pike", "minke whale", "pika", "stickbug", "pelican", "dugong", "bongo", "lemming", "shrimp", "piglet", "sabre-toothed tiger", "gemsbok", "tiger shark", "tuatara", "rottweiler", "elephant shrew", "ewe", "coati", "cichlid", "akita", "gharial", "thorny devil", "duck", "macaroni penguin", "steer", 
	adjectives = []string{"lulling", "vile", "foul", "cheerful", "messy", "dreadful", "uneven", "stinky", "young", "sparkling", "sweltering", "verdant", "hideous", "friendly", "blistering", "rambunctious", "carefree", "fat", "sloppy", "gloomy", "awful", "anemic", "minute", "stiff", "benevolent", "ceaseless", "large", "quick", "round", "glassy", "rusty", "scarce", "odd", "shining", "even", "dowdy", "solemn", "scorching", "brief", "rotten", "new", "plush", "cozy", "meandering", "apologetic", "nimble", "busy", "strong", "great", "brilliant", "piercing", "creepy", "miniature", "narrow", "whimsical", "fantastic", "cowardly", "disgusting", "marvelous", "snug", "stern", "stingy", "angry", "spiky", "cheeky", "gorgeous", "mysterious", "flat", "clever", "charming", "dismal", "meek", "somber", "sour", "thin", "beautiful", "stubborn", "crazy", "challenging", "gaunt", "salty", "indifferent", "huge", "daring", "awkward", "picturesque", "copious", "glowing", "truthful", "rude", "petite", "cranky", "ornery", "brazen", "modest", "purring", "filthy", "rotund", "short", "splendid", "hasty", "deafening", "crawling", "furious", "tall", "mute", "ghastly", "still", "arrogant", "crabby", "haughty", "curly", "voiceless", "hot", "courageous", "late", "microscopic", "vast", "stifling", "good", "disrespectful", "bashful", "moaning", "towering", "adventurous", "idyllic", "careless", "shocking", "erratic", "heavy", "square", "hard", "jagged", "gullible", "hushed", "revolting", "content", "thrifty", "sluggish", "eternal", "greedy", "pleasant", "small", "demanding", "greasy", "enormous", "hostile", "terrible", "chilly", "speedy", "massive", "loud", "puny", "striking", "clumsy", "soaring", "brave", "fast", "delicious", "effortless", "bland", "thick", "little", "ancient", "silent", "wonderful", "stuffed", "grimy", "bitter", "muggy", "shallow", "ridiculous", "absent-minded", "fuzzy", "peculiar", "mangy", "wide", "kind", "squeaky", "screeching", "silly", "squealing", "spoiled", "gigantic", "happy", "steep", "ingenious", "modern", "juicy", "gentle", "medium", "brawny", "curved", "lumpy", "afraid", "amusing", "thundering", "cooing", "oppressive", "swollen", "grave", "sturdy", "average", "proud", "rancid", "absurd", "entertaining", "annoyed", "fussy", "precise", "subtle", "gilded", "slow", "delinquent", "nervous", "hopeful", "rich", "adequate", "shrill", "plump", "freezing", "nasty", "endless", "lavish", "worried", "courteous", "bulky", "fair", "diminutive", "groggy", "miserable", "horrid", "crooked", "monstrous", "superb", "contrary", "lazy", "fidgety", "menacing", "swift", "stale", "quarrelsome", "quiet", "askew", "tough", "simple", "sweet", "hardworking", "frosty", "whispering", "famished", "crispy", "caring", "capable", "tiny", "immense", "startled", "lovely", "high-pitched", "tasteless", "decrepit", "tense", "lousy", "straight", "excited", "ugly", "stunning", "parched", "wild", "ripe", "lonely", "optimistic", "obnoxious", "cavernous", "different", "harsh", "creaky", "grand", "difficult", "temporary", "eccentric", "muffled", "alert", "delicate", "timid", "infamous", "enchanting", "anxious", "humble", "edgy", "severe", "repulsive", "desolate", "sleepy", "slimy", "irritable", "vigilant", "generous", "rapid", "old-fashioned", "hilly", "easy", "righteous", "joyful", "surprised", "starving", "big", "early", "compassionate", "moody", "perpetual", "dishonest", "serious", "foolish", "soft", "old", "scared", "mighty", "trendy", "curious", "hissing", "savage", "dense", "steaming", "broad", "slick", "creative", "icy", "adorable", "slight", "terrified", "intense", "noisy", "cautious", "sizzling", "blithe", "fluttering", "faint", "delighted", "smelly", "lively", "frightened", "gauzy", "long", "strict", "bored", "calm", "melodic", "spicy", "relaxed", "triangular", "dull", "wise", "dangerous", "smooth", "cruel", "creeping", "dawdling", "intimidating", "exhausted", "deep", "tasty", "obtuse", "graceful", "tranquil", "raspy", "selfish", "sullen", "malicious", "ecstatic", "wrinkly", "opulent", "polite", "fetid", "husky", "prudent", "skinny", "tricky", "impatient", "loyal", "f
	aboutPageText = `![Logo](/static/img/awwkoala.png)


# AwwKoala
## A Websocket Wiki and Kind Of A List Application
![Version 1.0](https://img.shields.io/badge/version-1.0-brightgreen.svg)

This is a self-contained wiki webserver that makes sharing easy and _fast_. You can make any page you want, and any page is editable by anyone. Pages load instantly for editing, and have special rendering for whether you want to view as a web page or view as list.

# Features
## Just type.
To jot a note, simply load the page at [` + "`" + `/` + "`" + `](http://AwwKoala.com/) and just start typing. No need to press edit, the browser will already be focused on the text. No need to press save - it will automatically save when you stop writing. The URL at [` + "`" + `/` + "`" + `](http://AwwKoala.com/) will redirect to an easy-to-remember name that you can use to reload the page at anytime, anywhere. But, you can also use any URL you want, e.g. [` + "`" + `/AnythingYouWant` + "`" + `](http://AwwKoala.com/AnythingYouWant).

## Views
All pages can be rendered into HTML by adding ` + "`" + `/view` + "`" + `. For example, the page [` + "`" + `/AnythingYouWant` + "`" + `](http://AwwKoala.com/AnythingYouWant) is rendered at [` + "`" + `/AnythingYouWant/view` + "`" + `](http://AwwKoala.com/AnythingYouWant/view). You can write in HTML or [Markdown](https://daringfireball.net/projects/markdown/) for page rendering. Math is supported with [Katex](https://github.com/Khan/KaTeX) using ` + "`" + `$\frac{1}{2}$` + "`" + ` for inline equations and ` + "`" + `$$\frac{1}{2}$$` + "`" + ` for regular equations.

## Lists
If you are writing a list and you want to tick off things really easily, just add ` + "`" + `/list` + "`" + `. For example, after editing [` + "`" + `/grocery` + "`" + `](http://AwwKoala.com/grocery), goto [` + "`" + `/grocery/list` + "`" + `](http://AwwKoala.com/grocery/list). In this page, whatever you click on will be striked through and moved to the end. This is helpful if you write a grocery list and then want to easily delete things from it.

## Automatic versioning
All previous versions of all notes are stored and can be accessed by adding ` + "`" + `?version=X` + "`" + ` onto ` + "`" + `/view` + "`" + ` or ` + "`" + `/edit` + "`" + `. If you are on the ` + "`" + `/view` + "`" + ` or ` + "`" + `/edit` + "`" + ` pages the menu below will show the most substantial changes in the history. Note, only the _current_ version can be edited (no branching allowed, yet).

# Contact
If you'd like help, go ahead and clone and send a pull request. If you find a bug, please submit [an issue](https://github.com/schollz/AwwKoala/issues). Any other comments, questions or anything at all, just <a href="https://twitter.com/intent/tweet?screen_name=zack_118" class="twitter-mention-button" data-related="zack_118">tweet me @zack_118</a>

Have fun.

**Powered by Raspberry Pi, Go, and NGINX**

![Raspberry Pi](/static/img/raspberrypi.png) ![Go Mascot](/static/img/gomascot.png) ![Nginx](/static/img/nginx.png)`

	robotsTxt = `User-agent: *
Disallow: /`

}

func randomAnimal() string {
	return strings.Replace(strings.Title(animals[rand.Intn(len(animals)-1)]), " ", "", -1)
}

func randomAdjective() string {
	return strings.Replace(strings.Title(adjectives[rand.Intn(len(adjectives)-1)]), " ", "", -1)
}

func randomAlliterateCombo() (combo string) {
	combo = ""
	for {
		animal := randomAnimal()
		adjective := randomAdjective()
		if animal[0] == adjective[0] {
			combo = adjective + animal
			break
		}
	}
	return
}

func contentType(filename string) string {
	switch {
	case strings.Contains(filename, ".css"):
		return "text/css"
	case strings.Contains(filename, ".jpg"):
		return "image/jpeg"
	case strings.Contains(filename, ".png"):
		return "image/png"
	case strings.Contains(filename, ".js"):
		return "application/javascript"
	}
	return "text/html"
}

func diffRebuildtexts(diffs []diffmatchpatch.Diff) []string {
	text := []string{"", ""}
	for _, myDiff := range diffs {
		if myDiff.Type != diffmatchpatch.DiffInsert {
			text[0] += myDiff.Text
		}
		if myDiff.Type != diffmatchpatch.DiffDelete {
			text[1] += myDiff.Text
		}
	}
	return text
}

func timeTrack(start time.Time, name string) {
	elapsed := time.Since(start)
	log.Printf("%s took %s", name, elapsed)
}

func getImportantVersions(p WikiData) []versionsInfo {
	// defer timeTrack(time.Now(), "getImportantVersions")
	m := map[int]int{}
	lastTime := time.Now().AddDate(0, -1, 0)
	for i, _ := range p.Diffs {
		parsedTime, _ := time.Parse(time.ANSIC, p.Timestamps[i])
		duration := parsedTime.Sub(lastTime)
		m[i] = int(duration.Seconds())
		if i > 0 {
			m[i-1] = m[i]
		}
		// On to the next one
		lastTime = parsedTime
	}

	// Sort in order of decreasing diff times
	n := map[int][]int{}
	var a []int
	for k, v := range m {
		n[v] = append(n[v], k)
	}
	for k := range n {
		a = append(a, k)
	}
	sort.Sort(sort.Reverse(sort.IntSlice(a)))

	// Get the top 4 biggest diff times
	var importantVersions []int
	var r []versionsInfo
	for _, k := range a {
		for _, s := range n[k] {
			if s != 0 && s != len(n) {
				// fmt.Printf("%d, %d\n", s, k)
				importantVersions = append(importantVersions, s)
				if len(importantVersions) > 10 {
					sort.Ints(importantVersions)
					for _, nn := range importantVersions {
						r = append(r, versionsInfo{p.Timestamps[nn], nn})
					}
					return r
				}
			}
		}
	}
	sort.Ints(importantVersions)
	for _, nn := range importantVersions {
		r = append(r, versionsInfo{p.Timestamps[nn], nn})
	}
	return r
}

func rebuildTextsToDiffN(p WikiData, n int) string {
	dmp := diffmatchpatch.New()
	lastText := ""
	for i, diff := range p.Diffs {
		seq1, _ := dmp.DiffFromDelta(lastText, diff)
		texts_linemode := diffRebuildtexts(seq1)
		rebuilt := texts_linemode[len(texts_linemode)-1]
		if i == n {
			return rebuilt
		}
		lastText = rebuilt
	}
	return "ERROR"
}