[MM-29157] Cloud invoices logic (#16056)

* Cloud invoices logic

This commit includes all the code needed to get and print invoices
from CWS

web/context.go

@@ -663,3 +663,15 @@ func (c *Context) RequireBotUserId() *Context {
 	}
 	return c
 }
+
+func (c *Context) RequireInvoiceId() *Context {
+	if c.Err != nil {
+		return c
+	}
+
+	if len(c.Params.InvoiceId) != 27 {
+		c.SetInvalidUrlParam("invoice_id")
+	}
+
+	return c
+}

web/params.go

@@ -80,6 +80,9 @@ type Params struct {
 	FilterParentTeamPermitted bool
 	CategoryId                string
 	WarnMetricId              string
+
+	// Cloud
+	InvoiceId string
 }
 
 func ParamsFromRequest(r *http.Request) *Params {
@@ -216,6 +219,10 @@ func ParamsFromRequest(r *http.Request) *Params {
 		params.RemoteId = val
 	}
 
+	if val, ok := props["invoice_id"]; ok {
+		params.InvoiceId = val
+	}
+
 	params.Scope = query.Get("scope")
 
 	if val, err := strconv.Atoi(query.Get("page")); err != nil || val < 0 {