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util.clj
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util.clj
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(ns nsfw.util
(:use hiccup.core
[hiccup.page :only (doctype)]
[clojure.pprint :only (pprint)])
(:require [clj-stacktrace.repl :as stacktrace]
[clojure.string :as str]
[ring.util.response :as resp]
[cheshire.custom :as json])
(:import [java.util Date]
[java.text SimpleDateFormat]
[java.net URLEncoder]
[org.pegdown PegDownProcessor Extensions]))
;; Logging
(defn clean-val [val]
(cond
(string? val) (str "\"" (str/replace val #"\"" "\\\\\"") "\"")
:else val))
(defn format-log-entry [key-vals]
(->> (partition 2 key-vals)
(map #(str (name (first %)) "=" (clean-val (second %))))
(interpose " ")
(reduce str)
(str (System/currentTimeMillis) " ")))
(defn make-logger [app-id ns]
(fn [& key-vals]
(println (format-log-entry (concat [:app-id app-id :ns ns] key-vals)))))
(def iso-formatter (SimpleDateFormat. "yyyy-MM-dd'T'HH:mm:ssZ"))
(defn iso-8601 [o]
(cond
(= Date (class o)) (.format iso-formatter o)
(= java.lang.Long (class o)) (.format iso-formatter (Date. o))
(= nil o) nil
(= "" o) nil
:else nil))
(defn format-ms [ms format]
(let [d (Date. ms)]
(.format (SimpleDateFormat. format) d)))
(defn day-suffix [])
(defn web-stacktrace [e req]
(str "<html><body>"
"<h1>500 - " (.getMessage e) "</h1>"
"<pre>" (stacktrace/pst-str e) "</pre>"
"<pre>" (str/replace (str req) #", " "\n") "</pre>"
"</html></body>"))
(defn include-css
([n]
(when n
(if (= :all n)
(->> (file-seq (java.io.File. "./public/css/"))
(filter #(.endsWith (.getName %) ".css"))
(filter #(.isFile %))
(map #(.getName %))
(map include-css))
(let [filename (if (keyword? n)
(str (name n) ".css")
n)]
(html [:link {:rel "stylesheet" :href (str "/css/" filename) :type "text/css"}])))))
([n & more]
(cons (include-css n) (map include-css more))))
(defn include-js
([] nil)
([n]
(when n
(if (= :all n)
(->> (file-seq (java.io.File. "./public/js/"))
(filter #(.endsWith (.getName %) ".js"))
(filter #(.isFile %))
(map #(.getName %))
(map include-css))
(let [filename (if (keyword? n)
(str (name n) ".js")
n)]
(html [:script {:type "text/javascript" :src (str "/js/" filename)}])))))
([n & more]
(cons (include-js n) (map include-js more))))
(defn container [width & body]
(apply vector (concat [:div {:class (str "container_" width)}] body)))
(def container-16 (partial container 16))
(defn grid [width & body]
(apply vector (concat [:div {:class (str "grid_" width)}] body)))
(def grid-16 (partial grid 16))
(defn throw-str [& args]
(throw (Exception. (apply str args))))
(defn sha1 [obj]
(let [bytes (.getBytes (with-out-str (pr obj)))]
(->> (.digest (java.security.MessageDigest/getInstance "SHA1") bytes)
(map #(Integer/toHexString (bit-and % 0xff)))
(apply str))))
(defn uuid []
(-> (java.util.UUID/randomUUID)
(str)
(str/replace #"-" "")))
(def secure-random-obj (java.security.SecureRandom.))
(defn sec-rand-str
"Generates a random string of bytes in hex"
[n]
(let [buf (byte-array n)]
(.nextBytes secure-random-obj buf)
(->> buf
(map #(Integer/toHexString (bit-and % 0xff)))
(apply str))))
(defn md5
"Compute the hex MD5 sum of a string."
[#^String str]
(let [alg (doto (java.security.MessageDigest/getInstance "MD5")
(.reset)
(.update (.getBytes str)))]
(try
(.toString (new BigInteger 1 (.digest alg)) 16)
(catch java.security.NoSuchAlgorithmException e
(throw (new RuntimeException e))))))
(defn grav-url-for [email & [_ size]]
(let [email (->> (or email "")
(str/trim)
(str/lower-case))
url (str "https://gravatar.com/avatar/" (md5 email) "?d=identicon")]
(if size
(str url "&s=" size)
url)))
(defn html-response [& body]
(-> (html body)
(resp/response)
(resp/header "Content-Type" "text/html;charset=utf-8")))
(json/add-encoder org.bson.types.ObjectId json/encode-str)
(defn to-json [o]
(json/generate-string o))
(defn from-json [s]
(json/parse-string s true))
(defn url-encode [s]
(when s
(URLEncoder/encode s)))
(defn decode-body [content-length body]
(when (and content-length
(> content-length 0))
(let [buf (byte-array content-length)]
(.read body buf 0 content-length)
(.close body)
(String. buf))))
(defn response-body
"Turn a HttpInputStream into a string."
[{:keys [content-length body]}]
(if (string? body)
body
(decode-body content-length body)))
(defn distinct-by
[key coll]
(let [step (fn step [xs seen]
(lazy-seq
((fn [[f :as xs] seen]
(when-let [s (seq xs)]
(if (contains? seen (key f))
(recur (rest s) seen)
(cons f (step (rest s) (conj seen (key f)))))))
xs seen)))]
(step coll #{})))
(defn parse-int [s & [default]]
(if s
(try
(Integer/parseInt s)
(catch Exception e
default))
default))
(defn markdown
"Render HTML from markdown"
[s]
(let [pgp (PegDownProcessor. Extensions/ALL)]
(when s
(.markdownToHtml pgp (str/replace s #"!\[\]" "![ ]")))))
(def pp pprint)
(defn pp-str [o]
(let [w (java.io.StringWriter.)]
(pprint o w)
(.toString w)))
(defn stacktrace->str [exc]
(let [sw (java.io.StringWriter.)
pw (java.io.PrintWriter. sw)]
(.printStackTrace exc pw)
(.toString sw)))
(defn now [] (System/currentTimeMillis))
(defn ms [date]
(cond
(= java.util.Date (class date)) (.getTime date)
(= org.joda.time.DateTime (class date)) (.getMillis date)))
(defn timeago [date-or-ms]
(when date-or-ms
(let [ms (if (number? date-or-ms)
(- (now) date-or-ms)
(- (now) (ms date-or-ms)))
s (/ ms 1000)
m (/ s 60)
h (/ m 60)
d (/ h 24)
y (/ d 365.0)]
(cond
(< s 60) "less than a minute"
(< m 2) "1 minute"
(< h 1) (str (int m) " minutes")
(< h 2) "1 hour"
(< d 1) (str (int h) " hours")
(< d 2) "1 day"
(< y 1) (str (int d) " days")
:else (str (format "%.1f" y) " years")))))