Mercurial > gemma
view pkg/models/sr.go @ 1467:5e4dcc768f90
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author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Mon, 03 Dec 2018 16:14:18 +0000 |
parents | 84e78d2e2d95 |
children | 056a86b24be2 |
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// This is Free Software under GNU Affero General Public License v >= 3.0 // without warranty, see README.md and license for details. // // SPDX-License-Identifier: AGPL-3.0-or-later // License-Filename: LICENSES/AGPL-3.0.txt // // Copyright (C) 2018 by via donau // – Österreichische Wasserstraßen-Gesellschaft mbH // Software engineering by Intevation GmbH // // Author(s): // * Sascha L. Teichmann <sascha.teichmann@intevation.de> // * Bernhard E. Reiter <bernhard.reiter@intevation.de> package models import ( "context" "database/sql" "encoding/json" "errors" "fmt" "io" "time" ) const SoundingResultDateFormat = "2006-01-02" type ( SoundingResultDate struct{ time.Time } SoundingResultMeta struct { Date SoundingResultDate `json:"date"` Bottleneck string `json:"bottleneck"` EPSG uint `json:"epsg"` DepthReference string `json:"depth-reference"` } ) const ( checkDepthReferenceSQL = ` SELECT true FROM depth_references WHERE depth_reference = $1` checkBottleneckSQL = ` SELECT true FROM waterway.bottlenecks WHERE objnam = $1` checkBottleneckDateUniqueSQL = ` SELECT true FROM waterway.sounding_results sr JOIN waterway.bottlenecks bn ON sr.bottleneck_id = bn.bottleneck_id WHERE bn.objnam = $1 AND sr.date_info = $2` ) func (srd SoundingResultDate) MarshalJSON() ([]byte, error) { return json.Marshal(srd.Format(SoundingResultDateFormat)) } func (srd *SoundingResultDate) UnmarshalJSON(data []byte) error { var s string if err := json.Unmarshal(data, &s); err != nil { return err } d, err := time.Parse(SoundingResultDateFormat, s) if err == nil { *srd = SoundingResultDate{d} } return err } func (m *SoundingResultMeta) Decode(r io.Reader) error { err := json.NewDecoder(r).Decode(m) if err == nil && m.EPSG == 0 { m.EPSG = WGS84 } return err } func (m *SoundingResultMeta) Validate(ctx context.Context, conn *sql.Conn) []error { var errs []error var b bool err := conn.QueryRowContext(ctx, checkDepthReferenceSQL, m.DepthReference).Scan(&b) switch { case err == sql.ErrNoRows: errs = append(errs, fmt.Errorf("unknown depth reference '%s'", m.DepthReference)) case err != nil: errs = append(errs, err) case !b: errs = append(errs, errors.New("unexpected depth reference")) } err = conn.QueryRowContext(ctx, checkBottleneckSQL, m.Bottleneck).Scan(&b) switch { case err == sql.ErrNoRows: errs = append(errs, fmt.Errorf("unknown bottleneck '%s'", m.Bottleneck)) case err != nil: errs = append(errs, err) case !b: errs = append(errs, errors.New("unexpected bottleneck")) } err = conn.QueryRowContext(ctx, checkBottleneckDateUniqueSQL, m.Bottleneck, m.Date.Time).Scan(&b) switch { case err == sql.ErrNoRows: // good! -> unique. case err != nil: errs = append(errs, err) case b: errs = append(errs, errors.New("sounding result for this date already exists")) } return errs }