130 lines
3.4 KiB
Go
130 lines
3.4 KiB
Go
// Copyright © 2016 Jip J. Dekker <jip@dekker.li>
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package settings
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import (
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"bufio"
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"encoding/json"
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"io/ioutil"
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"os"
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"path/filepath"
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"strings"
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"time"
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log "github.com/Sirupsen/logrus"
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"github.com/jjdekker/ponder/helpers"
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)
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const lyToken = "% PONDER"
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// Score represents the settings for a specific score file
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type Score struct {
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Name string // The name of the score in the songbook
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Categories []string `json:",omitempty"` // Categories to which the scores belong
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Path string // The path to the scores (uncompiled) file
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LastModified time.Time `json:"-"` // Time when the score source was last modified (will be set internally)
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OutputPath string `json:",omitempty"` // The path on which the compiled version of the score will be placed
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}
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// FromJSON reads the settings of a score from a JSON file
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func FromJSON(path string) (*Score, error) {
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data, err := ioutil.ReadFile(path)
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if err != nil {
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return nil, err
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}
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var s Score
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err = json.Unmarshal(data, &s)
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if err != nil {
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return nil, err
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}
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s.LastModified = helpers.LastModified(s.Path)
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return &s, nil
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}
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// FromLy reads the score metadata from a lilypond file.
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// The metadata should be on one line preceded by the lyToken.
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// The data itself should be in json format.
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func FromLy(path string) (*Score, error) {
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file, err := os.Open(path)
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if err != nil {
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return nil, err
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}
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scan := bufio.NewScanner(file)
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var line string
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for scan.Scan() {
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if strings.Contains(scan.Text(), lyToken) {
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line = strings.TrimLeftFunc(scan.Text(), func(r rune) bool {
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return r != '{'
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})
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break
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}
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}
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file.Close()
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var s Score
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if line != "" {
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err = json.Unmarshal([]byte(line), &s)
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if err != nil {
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return nil, err
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}
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}
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if s.Name == "" {
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s.Name = filepath.Base(path)[:strings.LastIndex(filepath.Base(path), ".")]
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}
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s.Path = path
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return &s, nil
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}
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// CreateScore creates a json file for a score given its path
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func CreateScore(path, workDir string) {
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if filepath.Ext(path) != ".pdf" {
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log.WithFields(log.Fields{"path": path}).
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Warning("Unsupported sheet music file")
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}
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jsonPath := path[:strings.LastIndex(path, ".")]
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s := Score{
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Path: path,
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Name: filepath.Base(jsonPath),
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}
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if filepath.Dir(path) != workDir {
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s.Categories = []string{filepath.Base(filepath.Dir(path))}
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}
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data, err := json.MarshalIndent(s, "", " ")
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helpers.Check(err, "Unable to generate valid json")
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err = ioutil.WriteFile(jsonPath+".json", data, 0644)
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helpers.Check(err, "Unable to save json to file")
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}
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// GenerateOutputPath fills path that the compiled score will take
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func (s *Score) GenerateOutputPath(opts *Settings) {
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if s.OutputPath != "" {
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return
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}
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file := filepath.Base(s.Path)
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dot := strings.LastIndex(file, ".")
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if dot == -1 {
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log.WithFields(log.Fields{"path": s.Path}).Error("Unable to compute output path")
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return
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}
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file = file[:dot+1] + "pdf"
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s.OutputPath = filepath.Join(opts.OutputDir, file)
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}
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