509 lines
14 KiB
Go
509 lines
14 KiB
Go
/* WIP Under Really Heavy Construction */
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package qgen
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import (
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"database/sql"
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"errors"
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"strconv"
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"strings"
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)
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func init() {
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Registry = append(Registry,
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&PgsqlAdapter{Name: "pgsql", Buffer: make(map[string]DBStmt)},
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)
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}
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type PgsqlAdapter struct {
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Name string // ? - Do we really need this? Can't we hard-code this?
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Buffer map[string]DBStmt
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BufferOrder []string // Map iteration order is random, so we need this to track the order, so we don't get huge diffs every commit
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}
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// GetName gives you the name of the database adapter. In this case, it's pgsql
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func (a *PgsqlAdapter) GetName() string {
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return a.Name
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}
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func (a *PgsqlAdapter) GetStmt(name string) DBStmt {
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return a.Buffer[name]
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}
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func (a *PgsqlAdapter) GetStmts() map[string]DBStmt {
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return a.Buffer
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}
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// TODO: Implement this
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func (a *PgsqlAdapter) BuildConn(config map[string]string) (*sql.DB, error) {
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return nil, nil
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}
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func (a *PgsqlAdapter) DbVersion() string {
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return "SELECT version()"
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}
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func (a *PgsqlAdapter) DropTable(name, table string) (string, error) {
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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q := "DROP TABLE IF EXISTS \"" + table + "\";"
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a.pushStatement(name, "drop-table", q)
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return q, nil
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}
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// TODO: Implement this
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// We may need to change the CreateTable API to better suit PGSQL and the other database drivers which are coming up
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func (a *PgsqlAdapter) CreateTable(name, table, charset, collation string, columns []DBTableColumn, keys []DBTableKey) (string, error) {
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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if len(columns) == 0 {
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return "", errors.New("You can't have a table with no columns")
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}
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q := "CREATE TABLE \"" + table + "\" ("
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for _, column := range columns {
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if column.AutoIncrement {
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column.Type = "serial"
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} else if column.Type == "createdAt" {
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column.Type = "timestamp"
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} else if column.Type == "datetime" {
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column.Type = "timestamp"
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}
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var size string
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if column.Size > 0 {
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size = " (" + strconv.Itoa(column.Size) + ")"
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}
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var end string
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if column.Default != "" {
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end = " DEFAULT "
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if a.stringyType(column.Type) && column.Default != "''" {
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end += "'" + column.Default + "'"
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} else {
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end += column.Default
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}
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}
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if !column.Null {
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end += " not null"
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}
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q += "\n\t`" + column.Name + "` " + column.Type + size + end + ","
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}
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if len(keys) > 0 {
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for _, key := range keys {
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q += "\n\t" + key.Type
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if key.Type != "unique" {
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q += " key"
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}
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q += "("
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for _, column := range strings.Split(key.Columns, ",") {
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q += "`" + column + "`,"
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}
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q = q[0:len(q)-1] + "),"
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}
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}
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q = q[0:len(q)-1] + "\n);"
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a.pushStatement(name, "create-table", q)
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return q, nil
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}
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// TODO: Implement this
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func (a *PgsqlAdapter) AddColumn(name, table string, column DBTableColumn, key *DBTableKey) (string, error) {
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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return "", nil
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}
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// TODO: Implement this
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func (a *PgsqlAdapter) DropColumn(name, table, colName string) (string, error) {
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return "", errors.New("not implemented")
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}
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// TODO: Implement this
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func (a *PgsqlAdapter) RenameColumn(name, table, oldName, newName string) (string, error) {
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return "", errors.New("not implemented")
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}
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// TODO: Implement this
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func (a *PgsqlAdapter) ChangeColumn(name, table, colName string, col DBTableColumn) (string, error) {
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return "", errors.New("not implemented")
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}
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// TODO: Implement this
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func (a *PgsqlAdapter) SetDefaultColumn(name, table, colName, colType, defaultStr string) (string, error) {
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if colType == "text" {
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return "", errors.New("text fields cannot have default values")
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}
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return "", errors.New("not implemented")
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}
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// TODO: Implement this
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// TODO: Test to make sure everything works here
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func (a *PgsqlAdapter) AddIndex(name, table, iname, colname string) (string, error) {
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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if iname == "" {
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return "", errors.New("You need a name for the index")
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}
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if colname == "" {
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return "", errors.New("You need a name for the column")
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}
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return "", errors.New("not implemented")
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}
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// TODO: Implement this
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// TODO: Test to make sure everything works here
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func (a *PgsqlAdapter) AddKey(name, table, column string, key DBTableKey) (string, error) {
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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if column == "" {
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return "", errors.New("You need a name for the column")
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}
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return "", errors.New("not implemented")
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}
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// TODO: Implement this
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// TODO: Test to make sure everything works here
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func (a *PgsqlAdapter) AddForeignKey(name, table, column, ftable, fcolumn string, cascade bool) (out string, e error) {
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var c = func(str string, val bool) {
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if e != nil || !val {
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return
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}
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e = errors.New("You need a " + str + " for this table")
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}
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c("name", table == "")
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c("column", column == "")
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c("ftable", ftable == "")
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c("fcolumn", fcolumn == "")
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if e != nil {
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return "", e
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}
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return "", errors.New("not implemented")
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}
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// TODO: Test this
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// ! We need to get the last ID out of this somehow, maybe add returning to every query? Might require some sort of wrapper over the sql statements
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func (a *PgsqlAdapter) SimpleInsert(name, table, columns, fields string) (string, error) {
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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q := "INSERT INTO \"" + table + "\"("
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if columns != "" {
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q += a.buildColumns(columns) + ") VALUES ("
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for _, field := range processFields(fields) {
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nameLen := len(field.Name)
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if field.Name[0] == '"' && field.Name[nameLen-1] == '"' && nameLen >= 3 {
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field.Name = "'" + field.Name[1:nameLen-1] + "'"
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}
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if field.Name[0] == '\'' && field.Name[nameLen-1] == '\'' && nameLen >= 3 {
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field.Name = "'" + strings.Replace(field.Name[1:nameLen-1], "'", "''", -1) + "'"
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}
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q += field.Name + ","
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}
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q = q[0 : len(q)-1]
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} else {
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q += ") VALUES ("
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}
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q += ")"
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a.pushStatement(name, "insert", q)
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return q, nil
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}
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func (a *PgsqlAdapter) buildColumns(cols string) (q string) {
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if cols == "" {
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return ""
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}
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// Escape the column names, just in case we've used a reserved keyword
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for _, col := range processColumns(cols) {
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if col.Type == TokenFunc {
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q += col.Left + ","
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} else {
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q += "\"" + col.Left + "\","
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}
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}
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return q[0 : len(q)-1]
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}
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// TODO: Implement this
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func (a *PgsqlAdapter) SimpleReplace(name, table, columns, fields string) (string, error) {
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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if len(columns) == 0 {
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return "", errors.New("No columns found for SimpleInsert")
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}
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if len(fields) == 0 {
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return "", errors.New("No input data found for SimpleInsert")
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}
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return "", nil
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}
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// TODO: Implement this
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func (a *PgsqlAdapter) SimpleUpsert(name, table, columns, fields, where string) (string, error) {
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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if len(columns) == 0 {
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return "", errors.New("No columns found for SimpleInsert")
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}
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if len(fields) == 0 {
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return "", errors.New("No input data found for SimpleInsert")
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}
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return "", nil
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}
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// TODO: Implemented, but we need CreateTable and a better installer to *test* it
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func (a *PgsqlAdapter) SimpleUpdate(up *updatePrebuilder) (string, error) {
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if up.table == "" {
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return "", errors.New("You need a name for this table")
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}
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if up.set == "" {
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return "", errors.New("You need to set data in this update statement")
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}
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q := "UPDATE \"" + up.table + "\" SET "
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for _, item := range processSet(up.set) {
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q += "`" + item.Column + "`="
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for _, token := range item.Expr {
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switch token.Type {
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case TokenFunc:
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// TODO: Write a more sophisticated function parser on the utils side.
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if strings.ToUpper(token.Contents) == "UTC_TIMESTAMP()" {
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token.Contents = "LOCALTIMESTAMP()"
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}
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q += " " + token.Contents
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case TokenOp, TokenNumber, TokenSub, TokenOr:
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q += " " + token.Contents
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case TokenColumn:
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q += " `" + token.Contents + "`"
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case TokenString:
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q += " '" + token.Contents + "'"
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}
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}
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q += ","
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}
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q = q[0 : len(q)-1]
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// Add support for BETWEEN x.x
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if len(up.where) != 0 {
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q += " WHERE"
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for _, loc := range processWhere(up.where) {
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for _, token := range loc.Expr {
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switch token.Type {
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case TokenFunc:
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// TODO: Write a more sophisticated function parser on the utils side. What's the situation in regards to case sensitivity?
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if strings.ToUpper(token.Contents) == "UTC_TIMESTAMP()" {
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token.Contents = "LOCALTIMESTAMP()"
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}
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q += " " + token.Contents
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case TokenOp, TokenNumber, TokenSub, TokenOr, TokenNot, TokenLike:
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q += " " + token.Contents
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case TokenColumn:
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q += " `" + token.Contents + "`"
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case TokenString:
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q += " '" + token.Contents + "'"
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default:
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panic("This token doesn't exist o_o")
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}
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}
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q += " AND"
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}
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q = q[0 : len(q)-4]
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}
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a.pushStatement(up.name, "update", q)
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return q, nil
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}
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// TODO: Implement this
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func (a *PgsqlAdapter) SimpleUpdateSelect(up *updatePrebuilder) (string, error) {
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return "", errors.New("not implemented")
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}
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// TODO: Implement this
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func (a *PgsqlAdapter) SimpleDelete(name, table, where string) (string, error) {
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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if where == "" {
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return "", errors.New("You need to specify what data you want to delete")
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}
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return "", nil
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}
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// TODO: Implement this
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func (a *PgsqlAdapter) ComplexDelete(b *deletePrebuilder) (string, error) {
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if b.table == "" {
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return "", errors.New("You need a name for this table")
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}
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if b.where == "" {
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return "", errors.New("You need to specify what data you want to delete")
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}
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return "", nil
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}
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// TODO: Implement this
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// We don't want to accidentally wipe tables, so we'll have a separate method for purging tables instead
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func (a *PgsqlAdapter) Purge(name, table string) (string, error) {
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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return "", nil
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}
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// TODO: Implement this
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func (a *PgsqlAdapter) SimpleSelect(name, table, columns, where, orderby, limit string) (string, error) {
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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if len(columns) == 0 {
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return "", errors.New("No columns found for SimpleSelect")
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}
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return "", nil
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}
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// TODO: Implement this
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func (a *PgsqlAdapter) ComplexSelect(prebuilder *selectPrebuilder) (string, error) {
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if prebuilder.table == "" {
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return "", errors.New("You need a name for this table")
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}
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if len(prebuilder.columns) == 0 {
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return "", errors.New("No columns found for ComplexSelect")
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}
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return "", nil
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}
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// TODO: Implement this
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func (a *PgsqlAdapter) SimpleLeftJoin(name, table1, table2, columns, joiners, where, orderby, limit string) (string, error) {
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if table1 == "" {
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return "", errors.New("You need a name for the left table")
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}
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if table2 == "" {
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return "", errors.New("You need a name for the right table")
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}
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if len(columns) == 0 {
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return "", errors.New("No columns found for SimpleLeftJoin")
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}
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if len(joiners) == 0 {
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return "", errors.New("No joiners found for SimpleLeftJoin")
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}
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return "", nil
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}
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// TODO: Implement this
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func (a *PgsqlAdapter) SimpleInnerJoin(name, table1, table2, columns, joiners, where, orderby, limit string) (string, error) {
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if table1 == "" {
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return "", errors.New("You need a name for the left table")
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}
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if table2 == "" {
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return "", errors.New("You need a name for the right table")
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}
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if len(columns) == 0 {
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return "", errors.New("No columns found for SimpleInnerJoin")
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}
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if len(joiners) == 0 {
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return "", errors.New("No joiners found for SimpleInnerJoin")
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}
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return "", nil
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}
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// TODO: Implement this
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func (a *PgsqlAdapter) SimpleInsertSelect(name string, ins DBInsert, sel DBSelect) (string, error) {
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return "", nil
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}
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// TODO: Implement this
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func (a *PgsqlAdapter) SimpleInsertLeftJoin(name string, ins DBInsert, sel DBJoin) (string, error) {
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return "", nil
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}
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// TODO: Implement this
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func (a *PgsqlAdapter) SimpleInsertInnerJoin(name string, ins DBInsert, sel DBJoin) (string, error) {
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return "", nil
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}
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// TODO: Implement this
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func (a *PgsqlAdapter) SimpleCount(name, table, where, limit string) (string, error) {
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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return "", nil
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}
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func (a *PgsqlAdapter) Builder() *prebuilder {
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return &prebuilder{a}
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}
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func (a *PgsqlAdapter) Write() error {
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var stmts, body string
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for _, name := range a.BufferOrder {
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if name[0] == '_' {
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continue
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}
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stmt := a.Buffer[name]
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// TODO: Add support for create-table? Table creation might be a little complex for Go to do outside a SQL file :(
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if stmt.Type != "create-table" {
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stmts += "\t" + name + " *sql.Stmt\n"
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body += `
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common.DebugLog("Preparing ` + name + ` statement.")
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stmts.` + name + `, err = db.Prepare("` + strings.Replace(stmt.Contents, "\"", "\\\"", -1) + `")
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if err != nil {
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log.Print("Error in ` + name + ` statement.")
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return err
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}
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`
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}
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}
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// TODO: Move these custom queries out of this file
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out := `// +build pgsql
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// This file was generated by Gosora's Query Generator. Please try to avoid modifying this file, as it might change at any time.
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package main
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import "log"
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import "database/sql"
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import "github.com/Azareal/Gosora/common"
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// nolint
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type Stmts struct {
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` + stmts + `
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getActivityFeedByWatcher *sql.Stmt
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getActivityCountByWatcher *sql.Stmt
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Mocks bool
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}
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// nolint
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func _gen_pgsql() (err error) {
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common.DebugLog("Building the generated statements")
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` + body + `
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return nil
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}
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`
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return writeFile("./gen_pgsql.go", out)
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}
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// Internal methods, not exposed in the interface
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func (a *PgsqlAdapter) pushStatement(name, stype, q string) {
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if name == "" {
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return
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}
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a.Buffer[name] = DBStmt{q, stype}
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a.BufferOrder = append(a.BufferOrder, name)
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}
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func (a *PgsqlAdapter) stringyType(ctype string) bool {
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ctype = strings.ToLower(ctype)
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return ctype == "char" || ctype == "varchar" || ctype == "timestamp" || ctype == "text"
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}
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