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
|
/**
* @fileoverview Config file operations. This file must be usable in the browser,
* so no Node-specific code can be here.
* @author Nicholas C. Zakas
*/
"use strict";
//------------------------------------------------------------------------------
// Private
//------------------------------------------------------------------------------
const RULE_SEVERITY_STRINGS = ["off", "warn", "error"],
RULE_SEVERITY = RULE_SEVERITY_STRINGS.reduce((map, value, index) => {
map[value] = index;
return map;
}, {}),
VALID_SEVERITIES = [0, 1, 2, "off", "warn", "error"];
//------------------------------------------------------------------------------
// Public Interface
//------------------------------------------------------------------------------
module.exports = {
/**
* Normalizes the severity value of a rule's configuration to a number
* @param {(number|string|[number, ...*]|[string, ...*])} ruleConfig A rule's configuration value, generally
* received from the user. A valid config value is either 0, 1, 2, the string "off" (treated the same as 0),
* the string "warn" (treated the same as 1), the string "error" (treated the same as 2), or an array
* whose first element is one of the above values. Strings are matched case-insensitively.
* @returns {(0|1|2)} The numeric severity value if the config value was valid, otherwise 0.
*/
getRuleSeverity(ruleConfig) {
const severityValue = Array.isArray(ruleConfig) ? ruleConfig[0] : ruleConfig;
if (severityValue === 0 || severityValue === 1 || severityValue === 2) {
return severityValue;
}
if (typeof severityValue === "string") {
return RULE_SEVERITY[severityValue.toLowerCase()] || 0;
}
return 0;
},
/**
* Converts old-style severity settings (0, 1, 2) into new-style
* severity settings (off, warn, error) for all rules. Assumption is that severity
* values have already been validated as correct.
* @param {Object} config The config object to normalize.
* @returns {void}
*/
normalizeToStrings(config) {
if (config.rules) {
Object.keys(config.rules).forEach(ruleId => {
const ruleConfig = config.rules[ruleId];
if (typeof ruleConfig === "number") {
config.rules[ruleId] = RULE_SEVERITY_STRINGS[ruleConfig] || RULE_SEVERITY_STRINGS[0];
} else if (Array.isArray(ruleConfig) && typeof ruleConfig[0] === "number") {
ruleConfig[0] = RULE_SEVERITY_STRINGS[ruleConfig[0]] || RULE_SEVERITY_STRINGS[0];
}
});
}
},
/**
* Determines if the severity for the given rule configuration represents an error.
* @param {int|string|Array} ruleConfig The configuration for an individual rule.
* @returns {boolean} True if the rule represents an error, false if not.
*/
isErrorSeverity(ruleConfig) {
return module.exports.getRuleSeverity(ruleConfig) === 2;
},
/**
* Checks whether a given config has valid severity or not.
* @param {number|string|Array} ruleConfig The configuration for an individual rule.
* @returns {boolean} `true` if the configuration has valid severity.
*/
isValidSeverity(ruleConfig) {
let severity = Array.isArray(ruleConfig) ? ruleConfig[0] : ruleConfig;
if (typeof severity === "string") {
severity = severity.toLowerCase();
}
return VALID_SEVERITIES.indexOf(severity) !== -1;
},
/**
* Checks whether every rule of a given config has valid severity or not.
* @param {Object} config The configuration for rules.
* @returns {boolean} `true` if the configuration has valid severity.
*/
isEverySeverityValid(config) {
return Object.keys(config).every(ruleId => this.isValidSeverity(config[ruleId]));
},
/**
* Normalizes a value for a global in a config
* @param {(boolean|string|null)} configuredValue The value given for a global in configuration or in
* a global directive comment
* @returns {("readable"|"writeable"|"off")} The value normalized as a string
* @throws Error if global value is invalid
*/
normalizeConfigGlobal(configuredValue) {
switch (configuredValue) {
case "off":
return "off";
case true:
case "true":
case "writeable":
case "writable":
return "writable";
case null:
case false:
case "false":
case "readable":
case "readonly":
return "readonly";
default:
throw new Error(`'${configuredValue}' is not a valid configuration for a global (use 'readonly', 'writable', or 'off')`);
}
}
};
|
