47 lines
1.3 KiB
Go
47 lines
1.3 KiB
Go
package db
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import "axolotl/models"
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func (db *DB) AddRel(f, t string, r models.RelType) error {
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_, err := db.Exec("INSERT OR IGNORE INTO rels (from_id, to_id, rel_type) VALUES (?, ?, ?)", f, t, r)
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return err
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}
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func (db *DB) RemoveRel(f, t string, r models.RelType) error {
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_, err := db.Exec("DELETE FROM rels WHERE from_id = ? AND to_id = ? AND rel_type = ?", f, t, r)
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return err
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}
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func getIDs(db *DB, q, id string, r models.RelType) ([]string, error) {
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rows, err := db.Query(q, id, r)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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var ids []string
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for rows.Next() {
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var i string
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rows.Scan(&i)
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ids = append(ids, i)
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}
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return ids, nil
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}
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func (db *DB) GetRelated(id string, r models.RelType) ([]string, error) {
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return getIDs(db, "SELECT to_id FROM rels WHERE from_id = ? AND rel_type = ?", id, r)
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}
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func (db *DB) GetIncomingRels(id string, r models.RelType) ([]string, error) {
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return getIDs(db, "SELECT from_id FROM rels WHERE to_id = ? AND rel_type = ?", id, r)
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}
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func (db *DB) GetRelNames(n *models.Node, r models.RelType) ([]string, error) {
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result := make([]string, 0, len(n.Relations[string(r)]))
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for _, id := range n.Relations[string(r)] {
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node, err := db.NodeByID(id)
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if err != nil {
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return nil, err
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}
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result = append(result, node.Title)
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}
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return result, nil
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}
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