Reduce code duplication in analytics.go

[theckman]

The three methods in analytics.go are like 99% the same, minus the last part of the API URL. This code is ripe for some DRYing by creating an unexported method, that accepts the final piece of as an argument and appends it to the URL.

go-pagerduty/analytics.go

Lines 61 to 115 in 2f646c3

	// GetAggregatedIncidentData gets the aggregated incident analytics for the requested data.
	func (c *Client) GetAggregatedIncidentData(ctx context.Context, analytics AnalyticsRequest) (AnalyticsResponse, error) {
	h := map[string]string{
	"X-EARLY-ACCESS": "analytics-v2",
	}
	resp, err := c.post(ctx, "/analytics/metrics/incidents/all", analytics, h)
	if err != nil {
	return AnalyticsResponse{}, err
	}
	var analyticsResponse AnalyticsResponse
	if err = c.decodeJSON(resp, &analyticsResponse); err != nil {
	return AnalyticsResponse{}, err
	}
	return analyticsResponse, nil
	}
	// GetAggregatedServiceData gets the aggregated service analytics for the requested data.
	func (c *Client) GetAggregatedServiceData(ctx context.Context, analytics AnalyticsRequest) (AnalyticsResponse, error) {
	h := map[string]string{
	"X-EARLY-ACCESS": "analytics-v2",
	}
	resp, err := c.post(ctx, "/analytics/metrics/incidents/services", analytics, h)
	if err != nil {
	return AnalyticsResponse{}, err
	}
	var analyticsResponse AnalyticsResponse
	if err = c.decodeJSON(resp, &analyticsResponse); err != nil {
	return AnalyticsResponse{}, err
	}
	return analyticsResponse, nil
	}
	// GetAggregatedTeamData gets the aggregated team analytics for the requested data.
	func (c *Client) GetAggregatedTeamData(ctx context.Context, analytics AnalyticsRequest) (AnalyticsResponse, error) {
	h := map[string]string{
	"X-EARLY-ACCESS": "analytics-v2",
	}
	resp, err := c.post(ctx, "/analytics/metrics/incidents/teams", analytics, h)
	if err != nil {
	return AnalyticsResponse{}, err
	}
	var analyticsResponse AnalyticsResponse
	if err = c.decodeJSON(resp, &analyticsResponse); err != nil {
	return AnalyticsResponse{}, err
	}
	return analyticsResponse, nil
	}

[theckman]

Fixed via #397.