move extensive NodeMetricsList handling to node repo func

internal/repository/node.go

@@ -10,6 +10,8 @@ import (
 	"database/sql"
 	"encoding/json"
 	"fmt"
+	"slices"
+	"strings"
 	"sync"
 	"time"
 
@@ -551,6 +553,140 @@ func (r *NodeRepository) CountStatesTimed(ctx context.Context, filters []*model.
 	return timedStates, nil
 }
 
+func (r *NodeRepository) GetNodesForList(
+	ctx context.Context,
+	cluster string,
+	subCluster string,
+	stateFilter string,
+	nodeFilter string,
+	page *model.PageRequest,
+) ([]string, map[string]string, int, bool, error) {
+
+	// Init Return Vars
+	nodes := make([]string, 0)
+	stateMap := make(map[string]string)
+	countNodes := 0
+	hasNextPage := false
+
+	// Build Filters
+	queryFilters := make([]*model.NodeFilter, 0)
+	if cluster != "" {
+		queryFilters = append(queryFilters, &model.NodeFilter{Cluster: &model.StringInput{Eq: &cluster}})
+	}
+	if subCluster != "" {
+		queryFilters = append(queryFilters, &model.NodeFilter{Subcluster: &model.StringInput{Eq: &subCluster}})
+	}
+	if nodeFilter != "" && stateFilter != "notindb" {
+		queryFilters = append(queryFilters, &model.NodeFilter{Hostname: &model.StringInput{Contains: &nodeFilter}})
+	}
+	if stateFilter != "all" && stateFilter != "notindb" {
+		var queryState schema.SchedulerState = schema.SchedulerState(stateFilter)
+		queryFilters = append(queryFilters, &model.NodeFilter{SchedulerState: &queryState})
+	}
+	// if healthFilter != "all" {
+	// 	filters = append(filters, &model.NodeFilter{HealthState: &healthFilter})
+	// }
+
+	// Special Case: Disable Paging for missing nodes filter, save IPP for later
+	var backupItems int
+	if stateFilter == "notindb" {
+		backupItems = page.ItemsPerPage
+		page.ItemsPerPage = -1
+	}
+
+	// Query Nodes From DB
+	rawNodes, serr := r.QueryNodes(ctx, queryFilters, page, nil) // Order not Used
+	if serr != nil {
+		cclog.Warn("error while loading node database data (Resolver.NodeMetricsList)")
+		return nil, nil, 0, false, serr
+	}
+
+	// Intermediate Node Result Info
+	for _, node := range rawNodes {
+		if node == nil {
+			continue
+		}
+		nodes = append(nodes, node.Hostname)
+		stateMap[node.Hostname] = string(node.NodeState)
+	}
+
+	// Special Case: Find Nodes not in DB node table but in metricStore only
+	if stateFilter == "notindb" {
+		// Reapply Original Paging
+		page.ItemsPerPage = backupItems
+		// Get Nodes From Topology
+		var topoNodes []string
+		if subCluster != "" {
+			scNodes := archive.NodeLists[cluster][subCluster]
+			topoNodes = scNodes.PrintList()
+		} else {
+			subClusterNodeLists := archive.NodeLists[cluster]
+			for _, nodeList := range subClusterNodeLists {
+				topoNodes = append(topoNodes, nodeList.PrintList()...)
+			}
+		}
+		// Compare to all nodes from cluster/subcluster in DB
+		var missingNodes []string
+		for _, scanNode := range topoNodes {
+			if !slices.Contains(nodes, scanNode) {
+				missingNodes = append(missingNodes, scanNode)
+			}
+		}
+		// Filter nodes by name
+		if nodeFilter != "" {
+			filteredNodesByName := []string{}
+			for _, missingNode := range missingNodes {
+				if strings.Contains(missingNode, nodeFilter) {
+					filteredNodesByName = append(filteredNodesByName, missingNode)
+				}
+			}
+			missingNodes = filteredNodesByName
+		}
+		// Sort Missing Nodes Alphanumerically
+		slices.Sort(missingNodes)
+		// Total Missing
+		countNodes = len(missingNodes)
+		// Apply paging
+		if countNodes > page.ItemsPerPage {
+			start := (page.Page - 1) * page.ItemsPerPage
+			end := start + page.ItemsPerPage
+			if end > countNodes {
+				end = countNodes
+				hasNextPage = false
+			} else {
+				hasNextPage = true
+			}
+			nodes = missingNodes[start:end]
+		} else {
+			nodes = missingNodes
+		}
+
+	} else {
+		// DB Nodes: Count and Find Next Page
+		var cerr error
+		countNodes, cerr = r.CountNodes(ctx, queryFilters)
+		if cerr != nil {
+			cclog.Warn("error while counting node database data (Resolver.NodeMetricsList)")
+			return nil, nil, 0, false, cerr
+		}
+
+		// Example Page 4 @ 10 IpP : Does item 41 exist?
+		// Minimal Page 41 @ 1 IpP : If len(result) is 1, Page 5 exists.
+		nextPage := &model.PageRequest{
+			ItemsPerPage: 1,
+			Page:         ((page.Page * page.ItemsPerPage) + 1),
+		}
+		nextNodes, err := r.QueryNodes(ctx, queryFilters, nextPage, nil) // Order not Used
+		if err != nil {
+			cclog.Warn("Error while querying next nodes")
+			return nil, nil, 0, false, err
+		}
+		hasNextPage = len(nextNodes) == 1
+	}
+
+	return nodes, stateMap, countNodes, hasNextPage, nil
+}
+
 func AccessCheck(ctx context.Context, query sq.SelectBuilder) (sq.SelectBuilder, error) {
 	user := GetUserFromContext(ctx)
 	return AccessCheckWithUser(user, query)