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43 lines
1.4 KiB
43 lines
1.4 KiB
package manager |
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import ( |
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"fmt" |
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"os" |
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"path/filepath" |
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"strings" |
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"github.com/Unbewohnte/OBM/util" |
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) |
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// parses given .osu file and returns the filename of its background |
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// NOTE: Osu! beatmap (as whole) can have multiple backgrounds for each .osu file |
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// the perfect example : https://osu.ppy.sh/beatmapsets/43701#osu/137122 |
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// this is why this function asks for a certain difficulty (.osu filename) to be sure |
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// to return the correct background name |
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func (BEATMAP *Beatmap) GetBackgroundName(diff string) (string, error) { |
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beatmapBytes, err := os.ReadFile(filepath.Join(BEATMAP.Path, diff)) |
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if err != nil { |
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return "", err |
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} |
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beatmapContents := string(beatmapBytes) |
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// get index of "[Events]" (this is where BG filename is stored) |
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eventsIndex := strings.Index(beatmapContents, "[Events]") |
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if eventsIndex == -1 { |
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return "", fmt.Errorf("could not retrieve index of \"[Events]\"") |
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} |
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// get index of [TimingPoints] (this tag is right after the previous "[Events]" tag, |
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// so we can grab the whole "[Events]" tag contents) |
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timingPointsIndex := strings.Index(beatmapContents, "[TimingPoints]") |
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if timingPointsIndex == -1 { |
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return "", fmt.Errorf("could not retrieve index of \"[TimingPoints]\"") |
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} |
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contentBetween := strings.Split(beatmapContents[eventsIndex:timingPointsIndex], ",") |
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for _, chunk := range contentBetween { |
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if util.IsImage(chunk) { |
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return strings.Split(chunk, "\"")[1], nil |
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} |
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} |
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return "", nil |
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}
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