Annotee: Export Coordinator link generator.

logdog/client/annotee/link_generator.go

Index: logdog/client/annotee/link_generator.go
diff --git a/logdog/client/annotee/link_generator.go b/logdog/client/annotee/link_generator.go
new file mode 100644
index 0000000000000000000000000000000000000000..93ab0c1f27e4b011a9a641333ca63d73a2f4cc9e
--- /dev/null
+++ b/logdog/client/annotee/link_generator.go
@@ -0,0 +1,41 @@
+// Copyright 2017 The LUCI Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
+
+package annotee
+
+import (
+	"github.com/luci/luci-go/logdog/common/types"
+	"github.com/luci/luci-go/logdog/common/viewer"
+	"github.com/luci/luci-go/luci_config/common/cfgtypes"
+)
+
+// LinkGenerator generates links for a given log stream.
+type LinkGenerator interface {
+	// GetLink returns a link for the specified aggregate streams.

[nodir, 2017/02/28 00:22:38]

typo

[dnj, 2017/02/28 00:24:43]

Acknowledged.

+	//
+	// If no link could be generated, GetLink may return an empty string.
+	GetLink(name ...types.StreamName) string
+}
+
+// CoordinatorLinkGenerator is a LinkGenerator implementation
+type CoordinatorLinkGenerator struct {
+	Host    string
+	Project cfgtypes.ProjectName
+	Prefix  types.StreamName
+}
+
+// CanGenerateLinks returns true if g is sufficiently configured to generate
+// LogDog Coordinator links.
+func (g *CoordinatorLinkGenerator) CanGenerateLinks() bool {
+	return (g.Host != "" && g.Prefix != "")
+}
+
+// GetLink implements LinkGenerator.
+func (g *CoordinatorLinkGenerator) GetLink(names ...types.StreamName) string {
+	paths := make([]types.StreamPath, len(names))
+	for i, name := range names {
+		paths[i] = g.Prefix.AsPathPrefix(name)
+	}
+	return viewer.GetURL(g.Host, g.Project, paths...)
+}