86 lines
1.9 KiB
Go
86 lines
1.9 KiB
Go
package wmo
|
|
|
|
import (
|
|
"context"
|
|
"go.mongodb.org/mongo-driver/bson"
|
|
ct "gogs.mikescher.com/BlackForestBytes/goext/cursortoken"
|
|
)
|
|
|
|
func (c *Coll[TData]) List(ctx context.Context, filter ct.Filter, pageSize *int, inTok ct.CursorToken) ([]TData, ct.CursorToken, error) {
|
|
if inTok.Mode == ct.CTMEnd {
|
|
return make([]TData, 0), ct.End(), nil
|
|
}
|
|
|
|
pipeline := filter.FilterQuery()
|
|
|
|
pf1, pd1, pf2, pd2 := filter.Pagination()
|
|
|
|
sortPrimary := pf1
|
|
sortDirPrimary := pd1
|
|
sortSecondary := &pf2
|
|
sortDirSecondary := &pd2
|
|
|
|
if pf1 == pf2 {
|
|
sortSecondary = nil
|
|
sortDirSecondary = nil
|
|
}
|
|
|
|
paginationPipeline, err := CreatePagination(c, inTok, sortPrimary, sortDirPrimary, sortSecondary, sortDirSecondary, pageSize)
|
|
if err != nil {
|
|
return nil, ct.CursorToken{}, err
|
|
}
|
|
|
|
pipeline = append(pipeline, paginationPipeline...)
|
|
|
|
cursor, err := c.coll.Aggregate(ctx, pipeline)
|
|
if err != nil {
|
|
return nil, ct.CursorToken{}, err
|
|
}
|
|
|
|
entities := make([]TData, 0, cursor.RemainingBatchLength()+1)
|
|
for (pageSize == nil || len(entities) != *pageSize) && cursor.Next(ctx) {
|
|
var entry TData
|
|
err = cursor.Decode(&entry)
|
|
if err != nil {
|
|
return nil, ct.CursorToken{}, err
|
|
}
|
|
entities = append(entities, entry)
|
|
}
|
|
|
|
if pageSize == nil || len(entities) <= *pageSize || !cursor.TryNext(ctx) {
|
|
return entities, ct.End(), nil
|
|
}
|
|
|
|
last := entities[len(entities)-1]
|
|
|
|
nextToken, _ := c.createToken(sortPrimary, sortDirPrimary, sortSecondary, sortDirSecondary, last, pageSize)
|
|
|
|
return entities, nextToken, nil
|
|
}
|
|
|
|
type countRes struct {
|
|
Count int64 `bson:"c"`
|
|
}
|
|
|
|
func (c *Coll[TData]) Count(ctx context.Context, filter ct.Filter) (int64, error) {
|
|
pipeline := filter.FilterQuery()
|
|
|
|
pipeline = append(pipeline, bson.D{{Key: "$count", Value: "c"}})
|
|
|
|
cursor, err := c.coll.Aggregate(ctx, pipeline)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
if cursor.Next(ctx) {
|
|
v := countRes{}
|
|
err = cursor.Decode(&v)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
return v.Count, nil
|
|
}
|
|
|
|
return 0, nil
|
|
}
|