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package escalation
import (
"context"
"database/sql"
"text/template"
"github.com/target/goalert/permission"
"github.com/target/goalert/search"
"github.com/target/goalert/util/sqlutil"
"github.com/target/goalert/validation/validate"
"github.com/pkg/errors"
)
// SearchOptions allow filtering and paginating the list of escalation policies.
type SearchOptions struct {
Search string `json:"s,omitempty"`
After SearchCursor `json:"a,omitempty"`
// FavoritesUserID specifies the UserID whose favorite escalation policies want to be displayed.
FavoritesUserID string `json:"u,omitempty"`
// FavoritesOnly controls filtering the results to those marked as favorites by FavoritesUserID.
FavoritesOnly bool `json:"g,omitempty"`
// FavoritesFirst indicates that escalation policy marked as favorite (by FavoritesUserID) should be returned first (before any non-favorites).
FavoritesFirst bool `json:"f,omitempty"`
// Omit specifies a list of policy IDs to exclude from the results.
Omit []string `json:"o,omitempty"`
Limit int `json:"-"`
}
// SearchCursor is used to indicate a position in a paginated list.
type SearchCursor struct {
Name string `json:"n,omitempty"`
IsFavorite bool `json:"f,omitempty"`
}
var searchTemplate = template.Must(template.New("search").Funcs(search.Helpers()).Parse(`
SELECT
pol.id,
pol.name,
pol.description,
pol.repeat,
fav IS DISTINCT FROM NULL
FROM escalation_policies pol
{{if not .FavoritesOnly }}
LEFT {{end}}JOIN user_favorites fav ON pol.id = fav.tgt_escalation_policy_id
AND {{if .FavoritesUserID}}fav.user_id = :favUserID{{else}}false{{end}}
WHERE true
{{if .Omit}}
AND NOT pol.id = any(:omit)
{{end}}
{{if .Search}}
AND ({{orderedPrefixSearch "search" "pol.name"}} OR {{contains "search" "pol.description"}} OR {{contains "search" "pol.name"}})
{{end}}
{{if .After.Name}}
AND
{{if not .FavoritesFirst}}
lower(pol.name) > lower(:afterName)
{{else if .After.IsFavorite}}
((fav IS DISTINCT FROM NULL AND lower(pol.name) > lower(:afterName)) OR fav isnull)
{{else}}
(fav isnull AND lower(pol.name) > lower(:afterName))
{{end}}
{{end}}
ORDER BY {{ .OrderBy }}
LIMIT {{.Limit}}
`))
type renderData SearchOptions
func (opts renderData) OrderBy() string {
if opts.FavoritesFirst {
return "fav isnull, lower(pol.name)"
}
return "lower(pol.name)"
}
func (opts renderData) Normalize() (*renderData, error) {
if opts.Limit == 0 {
opts.Limit = search.DefaultMaxResults
}
err := validate.Many(
validate.Search("Search", opts.Search),
validate.Range("Limit", opts.Limit, 0, search.MaxResults),
validate.ManyUUID("Omit", opts.Omit, 50),
)
if opts.After.Name != "" {
err = validate.Many(err, validate.IDName("After.Name", opts.After.Name))
}
if opts.FavoritesOnly || opts.FavoritesFirst || opts.FavoritesUserID != "" {
err = validate.Many(err, validate.UUID("FavoritesUserID", opts.FavoritesUserID))
}
if err != nil {
return nil, err
}
return &opts, err
}
func (opts renderData) QueryArgs() []sql.NamedArg {
return []sql.NamedArg{
sql.Named("search", opts.Search),
sql.Named("afterName", opts.After.Name),
sql.Named("omit", sqlutil.UUIDArray(opts.Omit)),
sql.Named("favUserID", opts.FavoritesUserID),
}
}
func (s *Store) Search(ctx context.Context, opts *SearchOptions) ([]Policy, error) {
err := permission.LimitCheckAny(ctx, permission.User)
if err != nil {
return nil, err
}
if opts == nil {
opts = &SearchOptions{}
}
userCheck := permission.User
if opts.FavoritesUserID != "" {
userCheck = permission.MatchUser(opts.FavoritesUserID)
}
err = permission.LimitCheckAny(ctx, permission.System, userCheck)
if err != nil {
return nil, err
}
data, err := (*renderData)(opts).Normalize()
if err != nil {
return nil, err
}
query, args, err := search.RenderQuery(ctx, searchTemplate, data)
if err != nil {
return nil, errors.Wrap(err, "render query")
}
rows, err := s.db.QueryContext(ctx, query, args...)
if errors.Is(err, sql.ErrNoRows) {
return nil, nil
}
if err != nil {
return nil, err
}
defer rows.Close()
var result []Policy
var p Policy
for rows.Next() {
err = rows.Scan(&p.ID, &p.Name, &p.Description, &p.Repeat, &p.isUserFavorite)
if err != nil {
return nil, err
}
result = append(result, p)
}
return result, nil
}
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