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/
handlersjson.go
135 lines (120 loc) · 4.08 KB
/
handlersjson.go
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package main
import (
//"fmt"
"net/http"
"time"
"encoding/json"
"strconv"
"github.com/gorilla/mux"
)
// Generates JSON list of locations
func RenderLocationsJSON(w http.ResponseWriter, r *http.Request) {
w.Header().Add("Access-Control-Allow-Origin", "*")
w.Header().Add("Access-Control-Allow-Methods", "GET")
w.Header().Add("Access-Control-Allow-Headers", "Content-Type, api_key, Authorization")
locations, _ := BuildLocationsList()
json.NewEncoder(w).Encode(locations)
}
// Generates JSON stats for a location
func RenderLocationStatsJSON(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
location := vars["location"]
source := r.URL.Query().Get("source")
intervalParam := r.URL.Query().Get("interval")
interval, _ := strconv.ParseInt(intervalParam, 10, 0)
fromParam := r.URL.Query().Get("from")
toParam := r.URL.Query().Get("to")
t := time.Now()
if fromParam == "" {
from := t.Add(-24 * time.Hour)
fromParam = from.Format("200601021504")
}
if toParam == "" {
toParam = t.Format("200601021504")
}
if interval < 1 {
interval = 2
}
wordCounts, _ := WordCountRootCollection(location, source, fromParam, toParam, int(interval), 1000)
totalCounts := map[string]int {}
for _, wordcount := range wordCounts {
count := totalCounts[wordcount.Term]
count = count + wordcount.Occurrences
totalCounts[wordcount.Term] = count
}
stats := map[string]string {}
stats["trendscount"] = strconv.Itoa(len(totalCounts))
w.Header().Add("Access-Control-Allow-Origin", "*")
w.Header().Add("Access-Control-Allow-Methods", "GET")
w.Header().Add("Access-Control-Allow-Headers", "Content-Type, api_key, Authorization")
json.NewEncoder(w).Encode(stats)
}
// Generates JSON for root list of trends
func TrendsRootIndex(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
location := vars["location"]
source := r.URL.Query().Get("source")
limitParam := r.URL.Query().Get("limit")
limit, _ := strconv.ParseInt(limitParam, 10, 0)
if limit < 1 {
limit = 10
}
intervalParam := r.URL.Query().Get("interval")
interval, _ := strconv.ParseInt(intervalParam, 10, 0)
fromParam := r.URL.Query().Get("from")
toParam := r.URL.Query().Get("to")
t := time.Now()
if fromParam == "" {
from := t.Add(-24 * time.Hour)
fromParam = from.Format("200601021504")
}
if toParam == "" {
toParam = t.Format("200601021504")
}
if interval < 1 {
interval = 2
}
sortedCounts, _ := WordCountRootCollection(location, source, fromParam, toParam, int(interval), int(limit))
w.Header().Add("Access-Control-Allow-Origin", "*")
w.Header().Add("Access-Control-Allow-Methods", "GET")
w.Header().Add("Access-Control-Allow-Headers", "Content-Type, api_key, Authorization")
json.NewEncoder(w).Encode(sortedCounts)
}
// Generates JSON list of trends for a term
func TrendsIndex(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
location := vars["location"]
source := r.URL.Query().Get("source")
term := vars["term"]
//termTrends := TermTrends {}
fromParam := r.URL.Query().Get("from")
toParam := r.URL.Query().Get("to")
velocityParam := r.URL.Query().Get("velocity")
minimumVelocity, _ := strconv.ParseFloat(velocityParam, 64)
intervalParam := r.URL.Query().Get("interval")
intervalConv, _ := strconv.ParseInt(intervalParam, 10, 0)
interval := int(intervalConv)
velocityInterval := float64(interval)
if velocityInterval == 0.0 {
velocityInterval = 1.0
}
if(minimumVelocity < 0.0) {
minimumVelocity = 0.0
}
t := time.Now()
if fromParam == "" {
from := t.Add(-24 * time.Hour)
fromParam = from.Format("200601021504")
}
if toParam == "" {
toParam = t.Format("200601021504")
}
if interval < 1 {
interval = 2
}
termPackage := TrendsCollection(source,location, term, fromParam, toParam, interval, velocityInterval, minimumVelocity)
w.Header().Add("Access-Control-Allow-Origin", "*")
w.Header().Add("Access-Control-Allow-Methods", "GET")
w.Header().Add("Access-Control-Allow-Headers", "Content-Type, api_key, Authorization")
json.NewEncoder(w).Encode(termPackage)
}