8 files changed, 155 insertions, 29 deletions
diff --git a/graphql/connections/connection_template.go b/graphql/connections/connection_template.go
index e20375b8..e98f53eb 100644
--- a/graphql/connections/connection_template.go
+++ b/graphql/connections/connection_template.go
@@ -7,6 +7,9 @@ import (
 	"github.com/cheekybits/genny/generic"
 )
 
+// Name define the name of the connection
+type Name generic.Type
+
 // NodeType define the node type handled by this relay connection
 type NodeType generic.Type
 
@@ -18,17 +21,17 @@ type ConnectionType generic.Type
 
 // NodeTypeEdgeMaker define a function that take a NodeType and an offset and
 // create an Edge.
-type NodeTypeEdgeMaker func(value NodeType, offset int) Edge
+type NameEdgeMaker func(value NodeType, offset int) Edge
 
-// NodeTypeConMaker define a function that create a ConnectionType
-type NodeTypeConMaker func(
+// NameConMaker define a function that create a ConnectionType
+type NameConMaker func(
 	edges []EdgeType,
 	nodes []NodeType,
 	info models.PageInfo,
 	totalCount int) (ConnectionType, error)
 
-// NodeTypeCon will paginate a source according to the input of a relay connection
-func NodeTypeCon(source []NodeType, edgeMaker NodeTypeEdgeMaker, conMaker NodeTypeConMaker, input models.ConnectionInput) (ConnectionType, error) {
+// NameCon will paginate a source according to the input of a relay connection
+func NameCon(source []NodeType, edgeMaker NameEdgeMaker, conMaker NameConMaker, input models.ConnectionInput) (ConnectionType, error) {
 	var nodes []NodeType
 	var edges []EdgeType
 	var cursors []string
diff --git a/graphql/connections/connections.go b/graphql/connections/connections.go
index 68608116..cdc6d07f 100644
--- a/graphql/connections/connections.go
+++ b/graphql/connections/connections.go
@@ -1,7 +1,8 @@
-//go:generate genny -in=connection_template.go -out=gen_bug.go gen "NodeType=string EdgeType=LazyBugEdge ConnectionType=models.BugConnection"
-//go:generate genny -in=connection_template.go -out=gen_operation.go gen "NodeType=bug.Operation EdgeType=models.OperationEdge ConnectionType=models.OperationConnection"
-//go:generate genny -in=connection_template.go -out=gen_comment.go gen "NodeType=bug.Comment EdgeType=models.CommentEdge ConnectionType=models.CommentConnection"
-//go:generate genny -in=connection_template.go -out=gen_timeline.go gen "NodeType=bug.TimelineItem EdgeType=models.TimelineItemEdge ConnectionType=models.TimelineItemConnection"
+//go:generate genny -in=connection_template.go -out=gen_bug.go gen "Name=LazyBug NodeType=string EdgeType=LazyBugEdge ConnectionType=models.BugConnection"
+//go:generate genny -in=connection_template.go -out=gen_identity.go gen "Name=LazyIdentity NodeType=string EdgeType=LazyIdentityEdge ConnectionType=models.IdentityConnection"
+//go:generate genny -in=connection_template.go -out=gen_operation.go gen "Name=Operation NodeType=bug.Operation EdgeType=models.OperationEdge ConnectionType=models.OperationConnection"
+//go:generate genny -in=connection_template.go -out=gen_comment.go gen "Name=Comment NodeType=bug.Comment EdgeType=models.CommentEdge ConnectionType=models.CommentConnection"
+//go:generate genny -in=connection_template.go -out=gen_timeline.go gen "Name=TimelineItem NodeType=bug.TimelineItem EdgeType=models.TimelineItemEdge ConnectionType=models.TimelineItemConnection"
 
 // Package connections implement a generic GraphQL relay connection
 package connections
diff --git a/graphql/connections/gen_bug.go b/graphql/connections/gen_bug.go
index 000ff109..ba0a65fa 100644
--- a/graphql/connections/gen_bug.go
+++ b/graphql/connections/gen_bug.go
@@ -12,17 +12,17 @@ import (
 
 // StringEdgeMaker define a function that take a string and an offset and
 // create an Edge.
-type StringEdgeMaker func(value string, offset int) Edge
+type LazyBugEdgeMaker func(value string, offset int) Edge
 
-// StringConMaker define a function that create a models.BugConnection
-type StringConMaker func(
+// LazyBugConMaker define a function that create a models.BugConnection
+type LazyBugConMaker func(
 	edges []LazyBugEdge,
 	nodes []string,
 	info models.PageInfo,
 	totalCount int) (models.BugConnection, error)
 
-// StringCon will paginate a source according to the input of a relay connection
-func StringCon(source []string, edgeMaker StringEdgeMaker, conMaker StringConMaker, input models.ConnectionInput) (models.BugConnection, error) {
+// LazyBugCon will paginate a source according to the input of a relay connection
+func LazyBugCon(source []string, edgeMaker LazyBugEdgeMaker, conMaker LazyBugConMaker, input models.ConnectionInput) (models.BugConnection, error) {
 	var nodes []string
 	var edges []LazyBugEdge
 	var cursors []string
diff --git a/graphql/connections/gen_comment.go b/graphql/connections/gen_comment.go
index 5c8b0eea..6df21c58 100644
--- a/graphql/connections/gen_comment.go
+++ b/graphql/connections/gen_comment.go
@@ -13,17 +13,17 @@ import (
 
 // BugCommentEdgeMaker define a function that take a bug.Comment and an offset and
 // create an Edge.
-type BugCommentEdgeMaker func(value bug.Comment, offset int) Edge
+type CommentEdgeMaker func(value bug.Comment, offset int) Edge
 
-// BugCommentConMaker define a function that create a models.CommentConnection
-type BugCommentConMaker func(
+// CommentConMaker define a function that create a models.CommentConnection
+type CommentConMaker func(
 	edges []models.CommentEdge,
 	nodes []bug.Comment,
 	info models.PageInfo,
 	totalCount int) (models.CommentConnection, error)
 
-// BugCommentCon will paginate a source according to the input of a relay connection
-func BugCommentCon(source []bug.Comment, edgeMaker BugCommentEdgeMaker, conMaker BugCommentConMaker, input models.ConnectionInput) (models.CommentConnection, error) {
+// CommentCon will paginate a source according to the input of a relay connection
+func CommentCon(source []bug.Comment, edgeMaker CommentEdgeMaker, conMaker CommentConMaker, input models.ConnectionInput) (models.CommentConnection, error) {
 	var nodes []bug.Comment
 	var edges []models.CommentEdge
 	var cursors []string
diff --git a/graphql/connections/gen_identity.go b/graphql/connections/gen_identity.go
new file mode 100644
index 00000000..28501171
--- /dev/null
+++ b/graphql/connections/gen_identity.go
@@ -0,0 +1,110 @@
+// This file was automatically generated by genny.
+// Any changes will be lost if this file is regenerated.
+// see https://github.com/cheekybits/genny
+
+package connections
+
+import (
+	"fmt"
+
+	"github.com/MichaelMure/git-bug/graphql/models"
+)
+
+// StringEdgeMaker define a function that take a string and an offset and
+// create an Edge.
+type LazyIdentityEdgeMaker func(value string, offset int) Edge
+
+// LazyIdentityConMaker define a function that create a models.IdentityConnection
+type LazyIdentityConMaker func(
+	edges []LazyIdentityEdge,
+	nodes []string,
+	info models.PageInfo,
+	totalCount int) (models.IdentityConnection, error)
+
+// LazyIdentityCon will paginate a source according to the input of a relay connection
+func LazyIdentityCon(source []string, edgeMaker LazyIdentityEdgeMaker, conMaker LazyIdentityConMaker, input models.ConnectionInput) (models.IdentityConnection, error) {
+	var nodes []string
+	var edges []LazyIdentityEdge
+	var cursors []string
+	var pageInfo models.PageInfo
+	var totalCount = len(source)
+
+	emptyCon, _ := conMaker(edges, nodes, pageInfo, 0)
+
+	offset := 0
+
+	if input.After != nil {
+		for i, value := range source {
+			edge := edgeMaker(value, i)
+			if edge.GetCursor() == *input.After {
+				// remove all previous element including the "after" one
+				source = source[i+1:]
+				offset = i + 1
+				pageInfo.HasPreviousPage = true
+				break
+			}
+		}
+	}
+
+	if input.Before != nil {
+		for i, value := range source {
+			edge := edgeMaker(value, i+offset)
+
+			if edge.GetCursor() == *input.Before {
+				// remove all after element including the "before" one
+				pageInfo.HasNextPage = true
+				break
+			}
+
+			edges = append(edges, edge.(LazyIdentityEdge))
+			cursors = append(cursors, edge.GetCursor())
+			nodes = append(nodes, value)
+		}
+	} else {
+		edges = make([]LazyIdentityEdge, len(source))
+		cursors = make([]string, len(source))
+		nodes = source
+
+		for i, value := range source {
+			edge := edgeMaker(value, i+offset)
+			edges[i] = edge.(LazyIdentityEdge)
+			cursors[i] = edge.GetCursor()
+		}
+	}
+
+	if input.First != nil {
+		if *input.First < 0 {
+			return emptyCon, fmt.Errorf("first less than zero")
+		}
+
+		if len(edges) > *input.First {
+			// Slice result to be of length first by removing edges from the end
+			edges = edges[:*input.First]
+			cursors = cursors[:*input.First]
+			nodes = nodes[:*input.First]
+			pageInfo.HasNextPage = true
+		}
+	}
+
+	if input.Last != nil {
+		if *input.Last < 0 {
+			return emptyCon, fmt.Errorf("last less than zero")
+		}
+
+		if len(edges) > *input.Last {
+			// Slice result to be of length last by removing edges from the start
+			edges = edges[len(edges)-*input.Last:]
+			cursors = cursors[len(cursors)-*input.Last:]
+			nodes = nodes[len(nodes)-*input.Last:]
+			pageInfo.HasPreviousPage = true
+		}
+	}
+
+	// Fill up pageInfo cursors
+	if len(cursors) > 0 {
+		pageInfo.StartCursor = cursors[0]
+		pageInfo.EndCursor = cursors[len(cursors)-1]
+	}
+
+	return conMaker(edges, nodes, pageInfo, totalCount)
+}
diff --git a/graphql/connections/gen_operation.go b/graphql/connections/gen_operation.go
index 9a1a53b7..3fbd724f 100644
--- a/graphql/connections/gen_operation.go
+++ b/graphql/connections/gen_operation.go
@@ -13,17 +13,17 @@ import (
 
 // BugOperationEdgeMaker define a function that take a bug.Operation and an offset and
 // create an Edge.
-type BugOperationEdgeMaker func(value bug.Operation, offset int) Edge
+type OperationEdgeMaker func(value bug.Operation, offset int) Edge
 
-// BugOperationConMaker define a function that create a models.OperationConnection
-type BugOperationConMaker func(
+// OperationConMaker define a function that create a models.OperationConnection
+type OperationConMaker func(
 	edges []models.OperationEdge,
 	nodes []bug.Operation,
 	info models.PageInfo,
 	totalCount int) (models.OperationConnection, error)
 
-// BugOperationCon will paginate a source according to the input of a relay connection
-func BugOperationCon(source []bug.Operation, edgeMaker BugOperationEdgeMaker, conMaker BugOperationConMaker, input models.ConnectionInput) (models.OperationConnection, error) {
+// OperationCon will paginate a source according to the input of a relay connection
+func OperationCon(source []bug.Operation, edgeMaker OperationEdgeMaker, conMaker OperationConMaker, input models.ConnectionInput) (models.OperationConnection, error) {
 	var nodes []bug.Operation
 	var edges []models.OperationEdge
 	var cursors []string
diff --git a/graphql/connections/gen_timeline.go b/graphql/connections/gen_timeline.go
index 4d417a45..1a4b2fe5 100644
--- a/graphql/connections/gen_timeline.go
+++ b/graphql/connections/gen_timeline.go
@@ -13,17 +13,17 @@ import (
 
 // BugTimelineItemEdgeMaker define a function that take a bug.TimelineItem and an offset and
 // create an Edge.
-type BugTimelineItemEdgeMaker func(value bug.TimelineItem, offset int) Edge
+type TimelineItemEdgeMaker func(value bug.TimelineItem, offset int) Edge
 
-// BugTimelineItemConMaker define a function that create a models.TimelineItemConnection
-type BugTimelineItemConMaker func(
+// TimelineItemConMaker define a function that create a models.TimelineItemConnection
+type TimelineItemConMaker func(
 	edges []models.TimelineItemEdge,
 	nodes []bug.TimelineItem,
 	info models.PageInfo,
 	totalCount int) (models.TimelineItemConnection, error)
 
-// BugTimelineItemCon will paginate a source according to the input of a relay connection
-func BugTimelineItemCon(source []bug.TimelineItem, edgeMaker BugTimelineItemEdgeMaker, conMaker BugTimelineItemConMaker, input models.ConnectionInput) (models.TimelineItemConnection, error) {
+// TimelineItemCon will paginate a source according to the input of a relay connection
+func TimelineItemCon(source []bug.TimelineItem, edgeMaker TimelineItemEdgeMaker, conMaker TimelineItemConMaker, input models.ConnectionInput) (models.TimelineItemConnection, error) {
 	var nodes []bug.TimelineItem
 	var edges []models.TimelineItemEdge
 	var cursors []string
diff --git a/graphql/connections/lazy_identity.go b/graphql/connections/lazy_identity.go
new file mode 100644
index 00000000..34ba579a
--- /dev/null
+++ b/graphql/connections/lazy_identity.go
@@ -0,0 +1,12 @@
+package connections
+
+// LazyIdentityEdge is a special relay edge used to implement a lazy loading connection
+type LazyIdentityEdge struct {
+	Id     string
+	Cursor string
+}
+
+// GetCursor return the cursor of a LazyIdentityEdge
+func (lbe LazyIdentityEdge) GetCursor() string {
+	return lbe.Cursor
+}