Porting golang yelp wrapper to v3-fusion-api

examples/yelp-https.go

@@ -0,0 +1,71 @@
+// This example demonstrates using querystring parameters to perform
+// a simple query with the yelp API.
+// Example url:  http://localhost:8000/?term=coffee&location=seattle
+package main
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"os"
+
+	"gitlab.bastian-buehrig.de/go-yelp-fusion/yelp"
+)
+
+func main() {
+	http.HandleFunc("/", res)
+	http.ListenAndServe(":8000", nil)
+}
+
+func res(w http.ResponseWriter, r *http.Request) {
+
+	// get the keys either from config file
+	options, err := getOptions(w)
+	if err != nil {
+		fmt.Println(err)
+	}
+
+	// create a new yelp client with the auth keys
+	client := yelp.New(options, nil)
+
+	// make a simple query
+	term := r.URL.Query().Get("term")
+	location := r.URL.Query().Get("location")
+	results, err := client.DoSimpleSearch(term, location)
+	if err != nil {
+		fmt.Println(err)
+	}
+
+	// print the results
+	io.WriteString(w, fmt.Sprintf("<div>Found a total of %v results for \"%v\" in \"%v\".</div>", results.Total, term, location))
+	io.WriteString(w, "<div>-----------------------------</div>")
+	for i := 0; i < len(results.Businesses); i++ {
+		io.WriteString(w, fmt.Sprintf("<div>%v, %v</div>", results.Businesses[i].Name, results.Businesses[i].Rating))
+	}
+}
+
+// getOptions obtains the keys required to use the Yelp API from a config file
+// or from environment variables.
+func getOptions(w http.ResponseWriter) (options *yelp.AuthOptions, err error) {
+
+	var o *yelp.AuthOptions
+
+	// start by looking for the keys in config.json
+	data, err := ioutil.ReadFile("../config.json")
+	if err != nil {
+		// if the file isn't there, check environment variables
+		o = &yelp.AuthOptions{
+			APIKey: os.Getenv("API_KEY"),
+		}
+		if o.APIKey == "" {
+			return o, errors.New("to use the sample, keys must be provided either in a config.json file at the root of the repo, or in environment variables")
+		}
+	} else {
+		err = json.Unmarshal(data, &o)
+		return o, err
+	}
+	return o, nil
+}