svgedit
Version:
Powerful SVG-Editor for your browser
74 lines (71 loc) • 1.81 kB
JavaScript
const {
min
} = Math;
function levenshtein(a, b) {
let t = [],
u = [],
i,
j;
const m = a.length,
n = b.length;
if (!m) {
return n;
}
if (!n) {
return m;
}
for (j = 0; j <= n; j++) {
t[j] = j;
}
for (i = 1; i <= m; i++) {
for (u = [i], j = 1; j <= n; j++) {
u[j] = a[i - 1] === b[j - 1] ? t[j - 1] : min(t[j - 1], t[j], u[j - 1]) + 1;
}
t = u;
}
return u[n];
}
function findSuggestion(str, arr) {
const distances = arr.map(el => levenshtein(el, str));
return arr[distances.indexOf(min(...distances))];
}
class OptionValidator {
constructor(descriptor) {
this.descriptor = descriptor;
}
validateTopLevelOptions(options, TopLevelOptionShape) {
const validOptionNames = Object.keys(TopLevelOptionShape);
for (const option of Object.keys(options)) {
if (!validOptionNames.includes(option)) {
throw new Error(this.formatMessage(`'${option}' is not a valid top-level option.
- Did you mean '${findSuggestion(option, validOptionNames)}'?`));
}
}
}
validateBooleanOption(name, value, defaultValue) {
if (value === undefined) {
return defaultValue;
} else {
this.invariant(typeof value === "boolean", `'${name}' option must be a boolean.`);
}
return value;
}
validateStringOption(name, value, defaultValue) {
if (value === undefined) {
return defaultValue;
} else {
this.invariant(typeof value === "string", `'${name}' option must be a string.`);
}
return value;
}
invariant(condition, message) {
if (!condition) {
throw new Error(this.formatMessage(message));
}
}
formatMessage(message) {
return `${this.descriptor}: ${message}`;
}
}
export { OptionValidator, findSuggestion };
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