clerk/journal/ast/ast.go (view raw)
Oleksandr Smirnov
Oleksandr Smirnov
olexsmir@gmail.com ast: add constructor functions to help with building ast by hand, 1 month ago
olexsmir@gmail.com ast: add constructor functions to help with building ast by hand, 1 month ago
| 1 | package ast |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "strings" |
| 6 | "time" |
| 7 | |
| 8 | "olexsmir.xyz/clerk/journal/token" |
| 9 | ) |
| 10 | |
| 11 | type Journal struct { |
| 12 | Entries []Entry |
| 13 | Errors []*ParseError |
| 14 | } |
| 15 | |
| 16 | type Entry interface { |
| 17 | entryNode() |
| 18 | } |
| 19 | |
| 20 | type ParseError struct { |
| 21 | Span token.Span |
| 22 | Message string |
| 23 | } |
| 24 | |
| 25 | type FileError struct { |
| 26 | Path string |
| 27 | Span token.Span |
| 28 | Message string |
| 29 | } |
| 30 | |
| 31 | type Date struct { |
| 32 | Year, Month, Day int |
| 33 | Sep byte // '-' '/' '.' |
| 34 | Span token.Span |
| 35 | } |
| 36 | |
| 37 | // DateOf builds a Date from t, sets '-' as the separator. Helper for handbuilding ast. |
| 38 | func DateOf(t time.Time) Date { |
| 39 | return Date{ |
| 40 | Year: t.Year(), |
| 41 | Month: int(t.Month()), |
| 42 | Day: t.Day(), |
| 43 | Sep: '-', |
| 44 | } |
| 45 | } |
| 46 | |
| 47 | // Compare returns -1 if d is before other, 0 if equal, 1 if after. |
| 48 | func (d Date) Compare(other Date) int { |
| 49 | if d.Year != other.Year { |
| 50 | if d.Year < other.Year { |
| 51 | return -1 |
| 52 | } |
| 53 | return 1 |
| 54 | } |
| 55 | if d.Month != other.Month { |
| 56 | if d.Month < other.Month { |
| 57 | return -1 |
| 58 | } |
| 59 | return 1 |
| 60 | } |
| 61 | if d.Day != other.Day { |
| 62 | if d.Day < other.Day { |
| 63 | return -1 |
| 64 | } |
| 65 | return 1 |
| 66 | } |
| 67 | return 0 |
| 68 | } |
| 69 | |
| 70 | // String renders d as written: with its own separator, and without the year |
| 71 | // when the date carried none. Returns "" for an unset or invalid date. |
| 72 | func (d Date) String() string { |
| 73 | if (d.Year == 0 && d.Month == 0 && d.Day == 0) || |
| 74 | (d.Month < 1 || d.Month > 12 || d.Day < 1 || d.Day > 31) { |
| 75 | return "" |
| 76 | } |
| 77 | sep := d.Sep |
| 78 | if sep == 0 { |
| 79 | sep = '-' |
| 80 | } |
| 81 | if d.Year == 0 { |
| 82 | return fmt.Sprintf("%d%c%d", d.Month, sep, d.Day) |
| 83 | } |
| 84 | return fmt.Sprintf("%04d%c%02d%c%02d", d.Year, sep, d.Month, sep, d.Day) |
| 85 | } |
| 86 | |
| 87 | type Time struct { |
| 88 | Hour, Minute, Second int |
| 89 | Span token.Span |
| 90 | } |
| 91 | |
| 92 | type DateTime struct { |
| 93 | Date Date |
| 94 | Time *Time |
| 95 | Span token.Span |
| 96 | } |
| 97 | |
| 98 | type Tag struct { |
| 99 | Key, Value string |
| 100 | Span token.Span |
| 101 | } |
| 102 | |
| 103 | type Comment struct { |
| 104 | Marker byte // ';' '#' '%' '*' |
| 105 | Tags []Tag |
| 106 | Text string |
| 107 | Span token.Span |
| 108 | } |
| 109 | |
| 110 | func (Comment) entryNode() {} |
| 111 | |
| 112 | type StatusType int |
| 113 | |
| 114 | func (s StatusType) String() string { |
| 115 | switch s { |
| 116 | case StatusCleared: |
| 117 | return "*" |
| 118 | case StatusPending: |
| 119 | return "!" |
| 120 | case StatusNone: |
| 121 | return "" |
| 122 | default: |
| 123 | panic("unreachable") |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | const ( |
| 128 | StatusNone StatusType = iota // not set |
| 129 | StatusCleared // * cleared |
| 130 | StatusPending // ! pending |
| 131 | ) |
| 132 | |
| 133 | type SubAccount struct { |
| 134 | Name string |
| 135 | Span token.Span |
| 136 | } |
| 137 | |
| 138 | type Account struct { |
| 139 | Name []SubAccount // ['expenses' 'food'] |
| 140 | Span token.Span |
| 141 | } |
| 142 | |
| 143 | // AccountFromString splits s on ':' into subaccounts. Helper for handbuilding ast. |
| 144 | func AccountFromString(s string) Account { |
| 145 | subs := strings.Split(s, ":") |
| 146 | acc := Account{Name: make([]SubAccount, len(subs))} |
| 147 | for i := range subs { |
| 148 | acc.Name[i] = SubAccount{Name: subs[i]} |
| 149 | } |
| 150 | return acc |
| 151 | } |
| 152 | |
| 153 | func (a Account) String() string { |
| 154 | if len(a.Name) == 0 { |
| 155 | return "" |
| 156 | } |
| 157 | var b strings.Builder |
| 158 | b.Grow(len(a.Name)) |
| 159 | b.WriteString(a.Name[0].Name) |
| 160 | for _, s := range a.Name[1:] { |
| 161 | b.WriteByte(':') |
| 162 | b.WriteString(s.Name) |
| 163 | } |
| 164 | return b.String() |
| 165 | } |