fathom/api/screen-resolutions.go

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package api
import (
"net/http"
"github.com/dannyvankooten/ana/core"
"encoding/json"
)
// URL: /api/screen-resolutions
var GetScreenResolutionsHandler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
period := getRequestedPeriod(r)
// get total
stmt, err := core.DB.Prepare(`
SELECT
COUNT(DISTINCT(ip_address))
FROM visits
WHERE timestamp >= DATE_SUB(CURRENT_TIMESTAMP, INTERVAL ? DAY)`)
checkError(err)
defer stmt.Close()
var total float32
stmt.QueryRow(period).Scan(&total)
// get rows
stmt, err = core.DB.Prepare(`
SELECT
screen_resolution,
COUNT(DISTINCT(ip_address)) AS count
FROM visits
WHERE timestamp >= DATE_SUB(CURRENT_TIMESTAMP, INTERVAL ? DAY)
GROUP BY screen_resolution
ORDER BY count DESC`)
checkError(err)
defer stmt.Close()
rows, err := stmt.Query(period)
checkError(err)
defer rows.Close()
results := make([]Datapoint, 0)
for rows.Next() {
var d Datapoint
err = rows.Scan(&d.Label, &d.Count);
checkError(err)
d.Percentage = float32(d.Count) / total * 100
results = append(results, d)
}
w.Header().Set("Content-Type", "application/json")
json.NewEncoder(w).Encode(results)
})