graphql: make Bug's actors and participants a connection

5 files changed, 129 insertions, 16 deletions

diff --git a/graphql/connections/connection_template.go b/graphql/connections/connection_template.go
index e98f53eb..412eb318 100644
--- a/graphql/connections/connection_template.go
+++ b/graphql/connections/connection_template.go
@@ -3,8 +3,9 @@ package connections
 import (
 	"fmt"
 
-	"github.com/MichaelMure/git-bug/graphql/models"
 	"github.com/cheekybits/genny/generic"
+
+	"github.com/MichaelMure/git-bug/graphql/models"
 )
 
 // Name define the name of the connection
diff --git a/graphql/connections/connections.go b/graphql/connections/connections.go
index cdc6d07f..d54a5068 100644
--- a/graphql/connections/connections.go
+++ b/graphql/connections/connections.go
@@ -1,5 +1,6 @@
-//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_lazy_bug.go gen "Name=LazyBug NodeType=string EdgeType=LazyBugEdge ConnectionType=models.BugConnection"
+//go:generate genny -in=connection_template.go -out=gen_lazy_identity.go gen "Name=LazyIdentity NodeType=string EdgeType=LazyIdentityEdge ConnectionType=models.IdentityConnection"
+//go:generate genny -in=connection_template.go -out=gen_identity.go gen "Name=Identity NodeType=identity.Interface EdgeType=models.IdentityEdge 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"
diff --git a/graphql/connections/gen_identity.go b/graphql/connections/gen_identity.go
index 28501171..2ba2f98f 100644
--- a/graphql/connections/gen_identity.go
+++ b/graphql/connections/gen_identity.go
@@ -8,23 +8,24 @@ import (
 	"fmt"
 
 	"github.com/MichaelMure/git-bug/graphql/models"
+	"github.com/MichaelMure/git-bug/identity"
 )
 
-// StringEdgeMaker define a function that take a string and an offset and
+// IdentityInterfaceEdgeMaker define a function that take a identity.Interface and an offset and
 // create an Edge.
-type LazyIdentityEdgeMaker func(value string, offset int) Edge
+type IdentityEdgeMaker func(value identity.Interface, offset int) Edge
 
-// LazyIdentityConMaker define a function that create a models.IdentityConnection
-type LazyIdentityConMaker func(
-	edges []LazyIdentityEdge,
-	nodes []string,
+// IdentityConMaker define a function that create a models.IdentityConnection
+type IdentityConMaker func(
+	edges []models.IdentityEdge,
+	nodes []identity.Interface,
 	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
+// IdentityCon will paginate a source according to the input of a relay connection
+func IdentityCon(source []identity.Interface, edgeMaker IdentityEdgeMaker, conMaker IdentityConMaker, input models.ConnectionInput) (models.IdentityConnection, error) {
+	var nodes []identity.Interface
+	var edges []models.IdentityEdge
 	var cursors []string
 	var pageInfo models.PageInfo
 	var totalCount = len(source)
@@ -56,18 +57,18 @@ func LazyIdentityCon(source []string, edgeMaker LazyIdentityEdgeMaker, conMaker
 				break
 			}
 
-			edges = append(edges, edge.(LazyIdentityEdge))
+			edges = append(edges, edge.(models.IdentityEdge))
 			cursors = append(cursors, edge.GetCursor())
 			nodes = append(nodes, value)
 		}
 	} else {
-		edges = make([]LazyIdentityEdge, len(source))
+		edges = make([]models.IdentityEdge, len(source))
 		cursors = make([]string, len(source))
 		nodes = source
 
 		for i, value := range source {
 			edge := edgeMaker(value, i+offset)
-			edges[i] = edge.(LazyIdentityEdge)
+			edges[i] = edge.(models.IdentityEdge)
 			cursors[i] = edge.GetCursor()
 		}
 	}
diff --git a/graphql/connections/gen_bug.go b/graphql/connections/gen_lazy_bug.go
index ba0a65fa..ba0a65fa 100644
--- a/graphql/connections/gen_bug.go
+++ b/graphql/connections/gen_lazy_bug.go
diff --git a/graphql/connections/gen_lazy_identity.go b/graphql/connections/gen_lazy_identity.go
new file mode 100644
index 00000000..28501171
--- /dev/null
+++ b/graphql/connections/gen_lazy_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)
+}