MM-12389 Update segment library to v3 (#11472)

* Update analytics-go dependency

* Migrate from segment library v2 to v3

* Reinclude gorilla/handlers module

* Fix missing module

* Remove reference to outdated analytics module

vendor/github.com/segmentio/analytics-go/context.go

@@ -0,0 +1,148 @@
+package analytics
+
+import (
+	"encoding/json"
+	"net"
+	"reflect"
+)
+
+// This type provides the representation of the `context` object as defined in
+// https://segment.com/docs/spec/common/#context
+type Context struct {
+	App       AppInfo      `json:"app,omitempty"`
+	Campaign  CampaignInfo `json:"campaign,omitempty"`
+	Device    DeviceInfo   `json:"device,omitempty"`
+	Library   LibraryInfo  `json:"library,omitempty"`
+	Location  LocationInfo `json:"location,omitempty"`
+	Network   NetworkInfo  `json:"network,omitempty"`
+	OS        OSInfo       `json:"os,omitempty"`
+	Page      PageInfo     `json:"page,omitempty"`
+	Referrer  ReferrerInfo `json:"referrer,omitempty"`
+	Screen    ScreenInfo   `json:"screen,omitempty"`
+	IP        net.IP       `json:"ip,omitempty"`
+	Locale    string       `json:"locale,omitempty"`
+	Timezone  string       `json:"timezone,omitempty"`
+	UserAgent string       `json:"userAgent,omitempty"`
+	Traits    Traits       `json:"traits,omitempty"`
+
+	// This map is used to allow extensions to the context specifications that
+	// may not be documented or could be introduced in the future.
+	// The fields of this map are inlined in the serialized context object,
+	// there is no actual "extra" field in the JSON representation.
+	Extra map[string]interface{} `json:"-"`
+}
+
+// This type provides the representation of the `context.app` object as defined
+// in https://segment.com/docs/spec/common/#context
+type AppInfo struct {
+	Name      string `json:"name,omitempty"`
+	Version   string `json:"version,omitempty"`
+	Build     string `json:"build,omitempty"`
+	Namespace string `json:"namespace,omitempty"`
+}
+
+// This type provides the representation of the `context.campaign` object as
+// defined in https://segment.com/docs/spec/common/#context
+type CampaignInfo struct {
+	Name    string `json:"name,omitempty"`
+	Source  string `json:"source,omitempty"`
+	Medium  string `json:"medium,omitempty"`
+	Term    string `json:"term,omitempty"`
+	Content string `json:"content,omitempty"`
+}
+
+// This type provides the representation of the `context.device` object as
+// defined in https://segment.com/docs/spec/common/#context
+type DeviceInfo struct {
+	Id            string `json:"id,omitempty"`
+	Manufacturer  string `json:"manufacturer,omitempty"`
+	Model         string `json:"model,omitempty"`
+	Name          string `json:"name,omitempty"`
+	Type          string `json:"type,omitempty"`
+	Version       string `json:"version,omitempty"`
+	AdvertisingID string `json:"advertisingId,omitempty"`
+}
+
+// This type provides the representation of the `context.library` object as
+// defined in https://segment.com/docs/spec/common/#context
+type LibraryInfo struct {
+	Name    string `json:"name,omitempty"`
+	Version string `json:"version,omitempty"`
+}
+
+// This type provides the representation of the `context.location` object as
+// defined in https://segment.com/docs/spec/common/#context
+type LocationInfo struct {
+	City      string  `json:"city,omitempty"`
+	Country   string  `json:"country,omitempty"`
+	Region    string  `json:"region,omitempty"`
+	Latitude  float64 `json:"latitude,omitempty"`
+	Longitude float64 `json:"longitude,omitempty"`
+	Speed     float64 `json:"speed,omitempty"`
+}
+
+// This type provides the representation of the `context.network` object as
+// defined in https://segment.com/docs/spec/common/#context
+type NetworkInfo struct {
+	Bluetooth bool   `json:"bluetooth,omitempty"`
+	Cellular  bool   `json:"cellular,omitempty"`
+	WIFI      bool   `json:"wifi,omitempty"`
+	Carrier   string `json:"carrier,omitempty"`
+}
+
+// This type provides the representation of the `context.os` object as defined
+// in https://segment.com/docs/spec/common/#context
+type OSInfo struct {
+	Name    string `json:"name,omitempty"`
+	Version string `json:"version,omitempty"`
+}
+
+// This type provides the representation of the `context.page` object as
+// defined in https://segment.com/docs/spec/common/#context
+type PageInfo struct {
+	Hash     string `json:"hash,omitempty"`
+	Path     string `json:"path,omitempty"`
+	Referrer string `json:"referrer,omitempty"`
+	Search   string `json:"search,omitempty"`
+	Title    string `json:"title,omitempty"`
+	URL      string `json:"url,omitempty"`
+}
+
+// This type provides the representation of the `context.referrer` object as
+// defined in https://segment.com/docs/spec/common/#context
+type ReferrerInfo struct {
+	Type string `json:"type,omitempty"`
+	Name string `json:"name,omitempty"`
+	URL  string `json:"url,omitempty"`
+	Link string `json:"link,omitempty"`
+}
+
+// This type provides the representation of the `context.screen` object as
+// defined in https://segment.com/docs/spec/common/#context
+type ScreenInfo struct {
+	Density int `json:"density,omitempty"`
+	Width   int `json:"width,omitempty"`
+	Height  int `json:"height,omitempty"`
+}
+
+// Satisfy the `json.Marshaler` interface. We have to flatten out the `Extra`
+// field but the standard json package doesn't support it yet.
+// Implementing this interface allows us to override the default marshaling of
+// the context object and to the inlining ourselves.
+//
+// Related discussion: https://github.com/golang/go/issues/6213
+func (ctx Context) MarshalJSON() ([]byte, error) {
+	v := reflect.ValueOf(ctx)
+	n := v.NumField()
+	m := make(map[string]interface{}, n+len(ctx.Extra))
+
+	// Copy the `Extra` map into the map representation of the context, it is
+	// important to do this operation before going through the actual struct
+	// fields so the latter take precendence and override duplicated values
+	// that would be set in the extensions.
+	for name, value := range ctx.Extra {
+		m[name] = value
+	}
+
+	return json.Marshal(structToMap(v, m))
+}