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95 lines
1.9 KiB
95 lines
1.9 KiB
package exql
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import (
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"strings"
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)
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type tableT struct {
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Name string
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Alias string
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}
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// Table struct represents a SQL table.
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type Table struct {
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Name interface{}
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hash hash
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}
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var _ = Fragment(&Table{})
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func quotedTableName(layout *Template, input string) string {
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input = trimString(input)
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// chunks := reAliasSeparator.Split(input, 2)
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chunks := separateByAS(input)
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if len(chunks) == 1 {
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// chunks = reSpaceSeparator.Split(input, 2)
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chunks = separateBySpace(input)
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}
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name := chunks[0]
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nameChunks := strings.SplitN(name, layout.ColumnSeparator, 2)
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for i := range nameChunks {
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// nameChunks[i] = strings.TrimSpace(nameChunks[i])
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nameChunks[i] = trimString(nameChunks[i])
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nameChunks[i] = layout.MustCompile(layout.IdentifierQuote, Raw{Value: nameChunks[i]})
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}
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name = strings.Join(nameChunks, layout.ColumnSeparator)
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var alias string
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if len(chunks) > 1 {
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// alias = strings.TrimSpace(chunks[1])
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alias = trimString(chunks[1])
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alias = layout.MustCompile(layout.IdentifierQuote, Raw{Value: alias})
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}
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return layout.MustCompile(layout.TableAliasLayout, tableT{name, alias})
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}
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// TableWithName creates an returns a Table with the given name.
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func TableWithName(name string) *Table {
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return &Table{Name: name}
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}
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// Hash returns a string hash of the table value.
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func (t *Table) Hash() string {
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return t.hash.Hash(t)
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}
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// Compile transforms a table struct into a SQL chunk.
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func (t *Table) Compile(layout *Template) (compiled string, err error) {
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if z, ok := layout.Read(t); ok {
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return z, nil
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}
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switch value := t.Name.(type) {
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case string:
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if t.Name == "" {
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return
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}
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// Splitting tables by a comma
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parts := separateByComma(value)
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l := len(parts)
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for i := 0; i < l; i++ {
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parts[i] = quotedTableName(layout, parts[i])
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}
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compiled = strings.Join(parts, layout.IdentifierSeparator)
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case Raw:
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compiled = value.String()
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}
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layout.Write(t, compiled)
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return
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}
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