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statistics.go
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statistics.go
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package api
import (
"encoding/json"
"github.com/gin-gonic/gin"
"github.com/joschahenningsen/TUM-Live/dao"
"github.com/joschahenningsen/TUM-Live/model"
"github.com/joschahenningsen/TUM-Live/tools"
log "github.com/sirupsen/logrus"
"net/http"
"strconv"
)
type statReq struct {
Interval string `form:"interval" json:"interval" xml:"interval" binding:"required"`
}
type statExportReq struct {
Format string `form:"format" binding:"required"`
Interval []string `form:"interval[]" binding:"required"`
}
func (r coursesRoutes) getStats(c *gin.Context) {
ctx, _ := c.Get("TUMLiveContext")
var req statReq
if err := c.ShouldBindQuery(&req); err != nil {
_ = c.Error(tools.RequestError{
Status: http.StatusBadRequest,
CustomMessage: "can not bind query",
Err: err,
})
return
}
var cid uint
// check if request is for server -> validate
cidFromContext := c.Param("courseID")
if cidFromContext == "0" {
if ctx.(tools.TUMLiveContext).User.Role != model.AdminType {
_ = c.Error(tools.RequestError{
Status: http.StatusForbidden,
CustomMessage: "not admin",
})
return
}
cid = 0
} else { // use course from context
cid = ctx.(tools.TUMLiveContext).Course.ID
}
switch req.Interval {
case "week":
fallthrough
case "day":
res, err := r.StatisticsDao.GetCourseStatsWeekdays(cid)
if err != nil {
log.WithError(err).WithField("courseId", cid).Warn("GetCourseStatsWeekdays failed")
_ = c.Error(tools.RequestError{
Status: http.StatusInternalServerError,
CustomMessage: "can not get course stats weekdays",
Err: err,
})
return
}
resp := chartJs{
ChartType: "bar",
Data: chartJsData{Datasets: []chartJsDataset{newChartJsDataset()}},
Options: newChartJsOptions(),
}
resp.Data.Datasets[0].Label = "Sum(viewers)"
resp.Data.Datasets[0].Data = res
c.JSON(http.StatusOK, resp)
case "hour":
res, err := r.StatisticsDao.GetCourseStatsHourly(cid)
if err != nil {
log.WithError(err).WithField("courseId", cid).Warn("GetCourseStatsHourly failed")
_ = c.Error(tools.RequestError{
Status: http.StatusInternalServerError,
CustomMessage: "can not get course stats hourly",
Err: err,
})
return
}
resp := chartJs{
ChartType: "bar",
Data: chartJsData{Datasets: []chartJsDataset{newChartJsDataset()}},
Options: newChartJsOptions(),
}
resp.Data.Datasets[0].Label = "Sum(viewers)"
resp.Data.Datasets[0].Data = res
c.JSON(http.StatusOK, resp)
case "activity-live":
resLive, err := r.StatisticsDao.GetStudentActivityCourseStats(cid, true)
if err != nil {
log.WithError(err).WithField("courseId", cid).Warn("GetCourseStatsLive failed")
_ = c.Error(tools.RequestError{
Status: http.StatusInternalServerError,
CustomMessage: "can not get student activity course stats",
Err: err,
})
return
}
resp := chartJs{
ChartType: "line",
Data: chartJsData{Datasets: []chartJsDataset{newChartJsDataset()}},
Options: newChartJsOptions(),
}
resp.Data.Datasets[0].Label = "Live"
resp.Data.Datasets[0].Data = resLive
resp.Data.Datasets[0].BorderColor = "#d12a5c"
resp.Data.Datasets[0].BackgroundColor = ""
c.JSON(http.StatusOK, resp)
case "activity-vod":
resVod, err := r.StatisticsDao.GetStudentActivityCourseStats(cid, false)
if err != nil {
log.WithError(err).WithField("courseId", cid).Warn("GetCourseStatsVod failed")
_ = c.Error(tools.RequestError{
Status: http.StatusInternalServerError,
CustomMessage: "can not get student activity course stats",
Err: err,
})
return
}
resp := chartJs{
ChartType: "line",
Data: chartJsData{Datasets: []chartJsDataset{newChartJsDataset()}},
Options: newChartJsOptions(),
}
resp.Data.Datasets[0].Label = "VoD"
resp.Data.Datasets[0].Data = resVod
resp.Data.Datasets[0].BorderColor = "#2a7dd1"
resp.Data.Datasets[0].BackgroundColor = ""
c.JSON(http.StatusOK, resp)
case "numStudents":
res, err := r.StatisticsDao.GetCourseNumStudents(cid)
if err != nil {
log.WithError(err).WithField("courseId", cid).Warn("GetCourseNumStudents failed")
_ = c.Error(tools.RequestError{
Status: http.StatusInternalServerError,
CustomMessage: "can not get course num students",
Err: err,
})
return
} else {
c.JSON(http.StatusOK, gin.H{"res": res})
}
case "vodViews":
res, err := r.StatisticsDao.GetCourseNumVodViews(cid)
if err != nil {
log.WithError(err).WithField("courseId", cid).Warn("GetCourseNumVodViews failed")
_ = c.Error(tools.RequestError{
Status: http.StatusInternalServerError,
CustomMessage: "can not getcourse num vod views",
Err: err,
})
return
} else {
c.JSON(http.StatusOK, gin.H{"res": res})
}
case "liveViews":
res, err := r.StatisticsDao.GetCourseNumLiveViews(cid)
if err != nil {
log.WithError(err).WithField("courseId", cid).Warn("GetCourseNumLiveViews failed")
_ = c.Error(tools.RequestError{
Status: http.StatusInternalServerError,
CustomMessage: "can not get course num live views",
Err: err,
})
return
} else {
c.JSON(http.StatusOK, gin.H{"res": res})
}
case "allDays":
{
res, err := r.StatisticsDao.GetCourseNumVodViewsPerDay(cid)
if err != nil {
log.WithError(err).WithField("courseId", cid).Warn("GetCourseNumLiveViews failed")
_ = c.Error(tools.RequestError{
Status: http.StatusInternalServerError,
CustomMessage: "can not get course num vod views per day",
Err: err,
})
return
} else {
resp := chartJs{
ChartType: "bar",
Data: chartJsData{Datasets: []chartJsDataset{newChartJsDataset()}},
Options: newChartJsOptions(),
}
resp.Data.Datasets[0].Label = "views"
resp.Data.Datasets[0].Data = res
resp.Data.Datasets[0].BackgroundColor = "#d12a5c"
c.JSON(http.StatusOK, resp)
}
}
default:
_ = c.Error(tools.RequestError{
Status: http.StatusBadRequest,
CustomMessage: "invalid interval",
})
return
}
}
func (r coursesRoutes) exportStats(c *gin.Context) {
ctx, _ := c.Get("TUMLiveContext")
var req statExportReq
if err := c.ShouldBindQuery(&req); err != nil {
_ = c.Error(tools.RequestError{
Status: http.StatusBadRequest,
CustomMessage: "can not bind query",
Err: err,
})
return
}
var cid uint
// check if request is for server -> validate
cidFromContext := c.Param("courseId")
if cidFromContext == "0" {
if ctx.(tools.TUMLiveContext).User.Role != model.AdminType {
_ = c.Error(tools.RequestError{
Status: http.StatusForbidden,
CustomMessage: "not admin",
})
return
}
cid = 0
} else { // use course from context
cid = ctx.(tools.TUMLiveContext).Course.ID
}
if req.Format != "json" && req.Format != "csv" {
log.WithField("courseId", cid).Warn("exportStats failed, invalid format")
_ = c.Error(tools.RequestError{
Status: http.StatusBadRequest,
CustomMessage: "exportStats failed, invalid format",
})
return
}
result := tools.ExportStatsContainer{}
for _, interval := range req.Interval {
switch interval {
case "week":
case "day":
res, err := r.StatisticsDao.GetCourseStatsWeekdays(cid)
if err != nil {
log.WithError(err).WithField("courseId", cid).Warn("GetCourseStatsWeekdays failed")
}
result = result.AddDataEntry(&tools.ExportDataEntry{
Name: interval,
XName: "Weekday",
YName: "Sum(viewers)",
Data: res,
})
case "hour":
res, err := r.StatisticsDao.GetCourseStatsHourly(cid)
if err != nil {
log.WithError(err).WithField("courseId", cid).Warn("GetCourseStatsHourly failed")
}
result = result.AddDataEntry(&tools.ExportDataEntry{
Name: interval,
XName: "Hour",
YName: "Sum(viewers)",
Data: res,
})
case "activity-live":
resLive, err := r.StatisticsDao.GetStudentActivityCourseStats(cid, true)
if err != nil {
log.WithError(err).WithField("courseId", cid).Warn("GetStudentActivityCourseStats failed")
}
result = result.AddDataEntry(&tools.ExportDataEntry{
Name: interval,
XName: "Week",
YName: "Live",
Data: resLive,
})
case "activity-vod":
resVod, err := r.StatisticsDao.GetStudentActivityCourseStats(cid, false)
if err != nil {
log.WithError(err).WithField("courseId", cid).Warn("GetStudentActivityCourseStats failed")
}
result = result.AddDataEntry(&tools.ExportDataEntry{
Name: interval,
XName: "Week",
YName: "VoD",
Data: resVod,
})
case "allDays":
res, err := r.StatisticsDao.GetCourseNumVodViewsPerDay(cid)
if err != nil {
log.WithError(err).WithField("courseId", cid).Warn("GetCourseNumVodViewsPerDay failed")
}
result = result.AddDataEntry(&tools.ExportDataEntry{
Name: interval,
XName: "Week",
YName: "VoD",
Data: res,
})
case "quickStats":
var quickStats []dao.Stat
numStudents, err := r.StatisticsDao.GetCourseNumStudents(cid)
if err != nil {
log.WithError(err).WithField("courseId", cid).Warn("GetCourseNumStudents failed")
} else {
quickStats = append(quickStats, dao.Stat{X: "Enrolled Students", Y: int(numStudents)})
}
vodViews, err := r.StatisticsDao.GetCourseNumVodViews(cid)
if err != nil {
log.WithError(err).WithField("courseId", cid).Warn("GetCourseNumVodViews failed")
} else {
quickStats = append(quickStats, dao.Stat{X: "Vod Views", Y: int(vodViews)})
}
liveViews, err := r.StatisticsDao.GetCourseNumLiveViews(cid)
if err != nil {
log.WithError(err).WithField("courseId", cid).Warn("GetCourseNumLiveViews failed")
} else {
quickStats = append(quickStats, dao.Stat{X: "Live Views", Y: int(liveViews)})
}
result = result.AddDataEntry(&tools.ExportDataEntry{
Name: interval,
XName: "Property",
YName: "Value",
Data: quickStats,
})
default:
log.WithField("courseId", cid).Warn("Invalid export interval")
}
}
if req.Format == "json" {
jsonResult, err := json.Marshal(result.ExportJson())
if err != nil {
log.WithError(err).WithField("courseId", cid).Warn("json.Marshal failed for stats export")
_ = c.Error(tools.RequestError{
Status: http.StatusInternalServerError,
CustomMessage: "json.Marshal failed for stats export",
Err: err,
})
return
}
c.Header("Content-Disposition", "attachment; filename=course-"+strconv.Itoa(int(cid))+"-stats.json")
c.Data(http.StatusOK, "application/octet-stream", jsonResult)
} else {
c.Header("Content-Disposition", "attachment; filename=course-"+strconv.Itoa(int(cid))+"-stats.csv")
c.Data(http.StatusOK, "application/octet-stream", []byte(result.ExportCsv()))
}
}
//
// Chart.js datastructures:
//
type chartJsData struct {
Datasets []chartJsDataset `json:"datasets"`
}
type chartJs struct {
ChartType string `json:"type"`
Data chartJsData `json:"data"`
Options chartJsOptions `json:"options"`
}
type chartJsScales struct {
Y struct {
BeginAtZero bool `json:"beginAtZero"`
} `json:"y"`
}
func newChartJsScales() chartJsScales {
return chartJsScales{Y: struct {
BeginAtZero bool `json:"beginAtZero"`
}{BeginAtZero: true}}
}
type chartJsOptions struct {
Responsive bool `json:"responsive"`
MaintainAspectRatio bool `json:"maintainAspectRatio"`
Scales chartJsScales `json:"scales,omitempty"`
}
func newChartJsOptions() chartJsOptions {
return chartJsOptions{
Responsive: true,
MaintainAspectRatio: false,
Scales: newChartJsScales(),
}
}
//chartJsDataset is a single dataset ready to be used in a Chart.js chart
type chartJsDataset struct {
Label string `json:"label"`
Fill bool `json:"fill"`
BorderColor string `json:"borderColor,omitempty"`
BackgroundColor string `json:"backgroundColor,omitempty"`
Data interface{} `json:"data"` // whatever data
Options chartJsOptions `json:"options"`
}
//New creates a chartJsDataset with some defaults
func newChartJsDataset() chartJsDataset {
return chartJsDataset{
Fill: false,
BorderColor: "#427dbd",
BackgroundColor: "#427dbd",
}
}