From c86a2453096d6071fcb2e15f5f846d89411f97fb Mon Sep 17 00:00:00 2001
From: Andrew Tomaka <atomaka@gmail.com>
Date: Mon, 22 Feb 2016 11:44:56 -0500
Subject: [PATCH] Initial commit

---
 .gitlab-ci.yml |  25 +++++++++++
 Dockerfile     |  12 ++++++
 main.go        | 115 +++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 152 insertions(+)
 create mode 100644 .gitlab-ci.yml
 create mode 100644 Dockerfile
 create mode 100644 main.go

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000..eda5caa
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,25 @@
+stages:
+  - build
+  - deploy
+
+build:
+  stage: build
+  script:
+    - docker build -t atomaka/punaday-api .
+  except:
+    - tags
+  tags:
+    - docker
+deploy:
+  stage: deploy
+  script:
+    - VERSION=$(git describe --tags)
+    - docker build -t atomaka/punaday-api .
+    - docker tag atomaka/punaday-api:latest docker.atomaka.com/atomaka/punaday-api:$VERSION
+    - docker tag atomaka/punaday-api:latest docker.atomaka.com/atomaka/punaday-api:latest
+    - docker login -u $DOCKER_USERNAME -p $DOCKER_PASSWORD -e me@atomaka.com docker.atomaka.com
+    - docker push docker.atomaka.com/atomaka/punaday-api
+  only:
+    - tags
+  tags:
+    - docker
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..9f23623
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,12 @@
+FROM alpine:latest
+COPY . /go/src/github.com/atomaka/punaday-api
+RUN apk update \
+    && apk add --no-cache go git \
+    && cd /go/src/github.com/atomaka/punaday-api \
+    && export GOPATH=/go \
+    && go get \
+    && go build -o /bin/punaday-api \
+    && rm -rf /go \
+    && apk del --purge git go \
+    && rm -rf /var/cache/apk*
+ENTRYPOINT ["/bin/punaday-api"]
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..c9201ac
--- /dev/null
+++ b/main.go
@@ -0,0 +1,115 @@
+package main
+
+import (
+	"encoding/json"
+	"log"
+	"net/http"
+	"strconv"
+
+	"golang.org/x/net/html"
+)
+
+const PUN_BASE = "http://www.punoftheday.com"
+const RANDOM_PUN = PUN_BASE + "/cgi-bin/randompun.pl"
+const SELECT_PUN = PUN_BASE + "/pun"
+
+type Pun struct {
+	Id   int    `json:"-"`
+	Url  string `json:"url"`
+	Text string `json:"text"`
+}
+
+type Error struct {
+	Status int    `json:"-"`
+	Detail string `json:"error"`
+}
+
+func main() {
+	http.HandleFunc("/puns/random", RandomPun)
+	http.HandleFunc("/puns/", ShowPun)
+	http.HandleFunc("/", NotFound)
+	log.Fatal(http.ListenAndServe(":8080", nil))
+}
+
+func NotFound(w http.ResponseWriter, r *http.Request) {
+	log.Printf("404 Not Found: %v\n", r.URL.Path)
+	w.Header().Set("Content-Type", "application/json; charset=utf-8")
+	err := &Error{404, "not_found"}
+	w.WriteHeader(err.Status)
+	json.NewEncoder(w).Encode(err)
+}
+
+func WritePun(w http.ResponseWriter, r *http.Request, pun Pun) {
+	log.Printf("200 OK: %v\n", r.URL.Path)
+	w.Header().Set("Content-Type", "application/json; charset=utf-8")
+	json.NewEncoder(w).Encode(pun)
+}
+
+func ShowPun(w http.ResponseWriter, r *http.Request) {
+	id := r.URL.Path[len("/puns/"):]
+
+	pun := getPun(SELECT_PUN + "/" + id)
+
+	if id != strconv.Itoa(pun.Id) {
+		NotFound(w, r)
+	} else {
+		WritePun(w, r, pun)
+	}
+}
+
+func RandomPun(w http.ResponseWriter, r *http.Request) {
+	pun := getPun(RANDOM_PUN)
+
+	WritePun(w, r, pun)
+}
+
+func getPun(url string) Pun {
+	resp, err := http.Get(url)
+	if err != nil {
+		log.Println("ERROR: Unable to access " + url)
+	}
+
+	b := resp.Body
+	defer b.Close()
+
+	pun := Pun{}
+
+	z := html.NewTokenizer(b)
+
+	for {
+		tt := z.Next()
+
+		switch {
+		case tt == html.ErrorToken:
+			return pun
+		case tt == html.StartTagToken:
+			t := z.Token()
+
+			isParagraph := t.Data == "p"
+			isInput := t.Data == "input"
+
+			if isParagraph && pun.Text == "" {
+				z.Next()
+				t := z.Token()
+				pun.Text = t.Data
+			}
+			if isInput {
+				if getAttr("name", t) == "PunID" {
+					pun.Id, _ = strconv.Atoi(getAttr("value", t))
+					pun.Url = SELECT_PUN + "/" + strconv.Itoa(pun.Id)
+				}
+			}
+		}
+	}
+}
+
+func getAttr(at string, t html.Token) string {
+	var val string
+	for _, a := range t.Attr {
+		if a.Key == at {
+			val = a.Val
+		}
+	}
+
+	return val
+}