From a88458b6c86d9b3e3f867730d39faa2abff2b646 Mon Sep 17 00:00:00 2001
From: Zack Scholl <zack.scholl@gmail.com>
Date: Wed, 10 Feb 2016 21:22:21 -0500
Subject: [PATCH] Added Admin to readme

Former-commit-id: 32c29fa2c9ae356c906a56c42599216a098fd917 [formerly 1094cb4faa2aa742dbef3477531d82e42a35ac27] [formerly 983165937d8bb743af4ae98293728a48bc6017c6 [formerly 1216c77c1a68a1a206d656a49c0848bfde738e7b [formerly 8bfcc08381788ec64c29e47590122ae18d19ade4]]]
Former-commit-id: f2b61169a064af5a501ca408a82c67b27424fe17 [formerly 26597ad59097a8e6dc8be59ab4dbd7cb8b1e37c7]
Former-commit-id: 56c18ea099014e16a0b4736e27fbcd6c152e2eb0
Former-commit-id: a273cc0f6c6d1ce4172a1baa88c8cf7952a41af3
---
 README.md |  6 +++---
 main.go   |  2 ++
 utils.go  | 27 +++++++++++++++++++++++++++
 3 files changed, 32 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 6ede8ca..63430d2 100644
--- a/README.md
+++ b/README.md
@@ -7,8 +7,8 @@
 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).
+## Simplicity
+The philosophy here is to *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. To quickly link to `/view` pages, just use `[[AnythingYouWnat]]`. Math is supported with [Katex](https://github.com/Khan/KaTeX) using `$\frac{1}{2}$` for inline equations and `$$\frac{1}{2}$$` for regular equations.
@@ -23,7 +23,7 @@ All previous versions of all notes are stored and can be accessed by adding `?ve
 
 Quickly transition between Edit/View/List by using `Ctl+Shift+E` to Edit, `Ctl+Shift+Z` to View, and `Ctl+Shift+L` to Listify.
 
-## Admin
+## Admin controls
 
 The Admin can view/delete all the documents by setting the `-a YourAdminKey` when starting the program. Then the admin has access to the `/ls/YourAdminKey` to view and delete any of the pages.
 
diff --git a/main.go b/main.go
index c9556ee..34ffc93 100644
--- a/main.go
+++ b/main.go
@@ -68,6 +68,8 @@ Options:`)
 	p := WikiData{"about", "", []string{}, []string{}}
 	p.save(string(aboutFile))
 
+	fmt.Println(RandStringBytesMaskImprSrc(10))
+
 	// var q WikiData
 	// q.load("about")
 	// fmt.Println(getImportantVersions(q))
diff --git a/utils.go b/utils.go
index 9d4b56a..f12fa3c 100644
--- a/utils.go
+++ b/utils.go
@@ -150,3 +150,30 @@ func rebuildTextsToDiffN(p WikiData, n int) string {
 	}
 	return "ERROR"
 }
+
+var src = rand.NewSource(time.Now().UnixNano())
+
+const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+const (
+	letterIdxBits = 6                    // 6 bits to represent a letter index
+	letterIdxMask = 1<<letterIdxBits - 1 // All 1-bits, as many as letterIdxBits
+	letterIdxMax  = 63 / letterIdxBits   // # of letter indices fitting in 63 bits
+)
+
+func RandStringBytesMaskImprSrc(n int) string {
+	b := make([]byte, n)
+	// A src.Int63() generates 63 random bits, enough for letterIdxMax characters!
+	for i, cache, remain := n-1, src.Int63(), letterIdxMax; i >= 0; {
+		if remain == 0 {
+			cache, remain = src.Int63(), letterIdxMax
+		}
+		if idx := int(cache & letterIdxMask); idx < len(letterBytes) {
+			b[i] = letterBytes[idx]
+			i--
+		}
+		cache >>= letterIdxBits
+		remain--
+	}
+
+	return string(b)
+}