rulemorph 0.3.1

YAML-based declarative data transformation engine for CSV/JSON to JSON
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140

use super::args::args_len;
use super::boolean::{eval_bool_and_or, eval_bool_not, eval_compare};
use super::date::{eval_date_format, eval_to_unixtime};
use super::lookup::eval_lookup;
use super::number::{eval_numeric_op, eval_round, eval_to_base};
use super::*;

mod array_dispatch;
mod json_dispatch;
mod string_dispatch;

use self::array_dispatch::{eval_array_dispatch, is_array_operator};
use self::json_dispatch::{eval_json_dispatch, is_json_operator};
use self::string_dispatch::{eval_string_dispatch, is_string_operator};

pub(crate) fn eval_op(
    expr_op: &ExprOp,
    record: &JsonValue,
    context: Option<&JsonValue>,
    out: &JsonValue,
    base_path: &str,
    injected: Option<&EvalValue>,
    locals: Option<&EvalLocals<'_>>,
) -> Result<EvalValue, TransformError> {
    let total_len = args_len(&expr_op.args, injected);
    if total_len == 0 {
        return Err(TransformError::new(
            TransformErrorKind::ExprError,
            "expr.args must be a non-empty array",
        )
        .with_path(format!("{}.args", base_path)));
    }

    match expr_op.op.as_str() {
        op if is_string_operator(op) => {
            eval_string_dispatch(expr_op, record, context, out, base_path, injected, locals)
        }
        "lookup" => eval_lookup(
            &expr_op.args,
            injected,
            record,
            context,
            out,
            base_path,
            false,
            locals,
        ),
        "lookup_first" => eval_lookup(
            &expr_op.args,
            injected,
            record,
            context,
            out,
            base_path,
            true,
            locals,
        ),
        op if is_json_operator(op) => {
            eval_json_dispatch(expr_op, record, context, out, base_path, injected, locals)
        }
        op if is_array_operator(op) => {
            eval_array_dispatch(expr_op, record, context, out, base_path, injected, locals)
        }
        "+" | "-" | "*" | "/" => {
            eval_numeric_op(expr_op, injected, record, context, out, base_path, locals)
        }
        "round" => eval_round(
            &expr_op.args,
            injected,
            record,
            context,
            out,
            base_path,
            locals,
        ),
        "to_base" => eval_to_base(
            &expr_op.args,
            injected,
            record,
            context,
            out,
            base_path,
            locals,
        ),
        "date_format" => eval_date_format(
            &expr_op.args,
            injected,
            record,
            context,
            out,
            base_path,
            locals,
        ),
        "to_unixtime" => eval_to_unixtime(
            &expr_op.args,
            injected,
            record,
            context,
            out,
            base_path,
            locals,
        ),
        "and" => eval_bool_and_or(
            &expr_op.args,
            injected,
            record,
            context,
            out,
            base_path,
            true,
            locals,
        ),
        "or" => eval_bool_and_or(
            &expr_op.args,
            injected,
            record,
            context,
            out,
            base_path,
            false,
            locals,
        ),
        "not" => eval_bool_not(
            &expr_op.args,
            injected,
            record,
            context,
            out,
            base_path,
            locals,
        ),
        "==" | "!=" | "<" | "<=" | ">" | ">=" | "~=" => {
            eval_compare(expr_op, injected, record, context, out, base_path, locals)
        }
        _ => Err(
            TransformError::new(TransformErrorKind::ExprError, "expr.op is not supported")
                .with_path(format!("{}.op", base_path)),
        ),
    }
}