79 lines
2.9 KiB
D
79 lines
2.9 KiB
D
module data.impl.note;
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import data.model : Note;
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import data.note;
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import d2sqlite3;
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import data.impl.sqlite3_helpers;
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import handy_httpd;
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import std.typecons;
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class SqliteNoteDataSource : NoteDataSource {
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Note createNote(string username, ulong noteListId, string content) {
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Database db = getDb(username);
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Statement ordStmt = db.prepare("SELECT MAX(ordinality) + 1 FROM note WHERE note_list_id = ?");
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ordStmt.bind(1, noteListId);
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Nullable!uint ordResult = ordStmt.execute().oneValue!(Nullable!uint);
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uint ordinality = 0;
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if (!ordResult.isNull) ordinality = ordResult.get();
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Statement insertStmt = db.prepare("INSERT INTO note (note_list_id, ordinality, content) VALUES (?, ?, ?)");
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insertStmt.bind(1, noteListId);
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insertStmt.bind(2, ordinality);
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insertStmt.bind(3, content);
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insertStmt.execute();
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return Note(
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db.lastInsertRowid(),
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noteListId,
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ordinality,
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content
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);
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}
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Note updateNote(string username, ulong id, Note newData) {
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Database db = getDb(username);
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ResultRange result = db.execute("SELECT * FROM note WHERE id = ?", id);
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if (result.empty()) throw new HttpStatusException(HttpStatus.NOT_FOUND);
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Note note = parseNote(result.front());
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db.begin();
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if (note.ordinality != newData.ordinality) {
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if (newData.ordinality > note.ordinality) {
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// Decrement all notes between the old index and the new one.
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db.execute(
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"UPDATE note SET ordinality = ordinality - 1 WHERE ordinality > ? AND ordinality <= ?",
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note.ordinality,
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newData.ordinality
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);
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} else {
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// Increment all notes between the old index and the new one.
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db.execute(
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"UPDATE note SET ordinality = ordinality + 1 WHERE ordinality >= ? AND ordinality < ?",
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newData.ordinality,
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note.ordinality
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);
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}
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}
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db.execute(
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"UPDATE note SET ordinality = ?, content = ? WHERE id = ?",
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newData.ordinality,
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newData.content,
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id
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);
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db.commit();
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return Note(id, note.noteListId, newData.ordinality, newData.content);
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}
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void deleteNote(string username, ulong id) {
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Database db = getDb(username);
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db.begin();
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Nullable!uint ordinality = db.execute(
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"SELECT ordinality FROM note WHERE id = ?", id
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).oneValue!(Nullable!uint)();
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db.execute("DELETE FROM note WHERE id = ?", id);
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if (!ordinality.isNull) {
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db.execute("UPDATE note SET ordinality = ordinality - 1 WHERE ordinality > ?", ordinality.get);
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}
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db.commit();
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}
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} |