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'use strict';
/*eslint-disable max-len*/
var YAMLException = require('./exception');
var Type = require('./type');
function compileList(schema, name) {
var result = [];
schema[name].forEach(function (currentType) {
var newIndex = result.length;
result.forEach(function (previousType, previousIndex) {
if (previousType.tag === currentType.tag &&
previousType.kind === currentType.kind &&
previousType.multi === currentType.multi) {
newIndex = previousIndex;
}
});
result[newIndex] = currentType;
});
return result;
}
function compileMap(/* lists... */) {
var result = {
scalar: {},
sequence: {},
mapping: {},
fallback: {},
multi: {
scalar: [],
sequence: [],
mapping: [],
fallback: []
}
}, index, length;
function collectType(type) {
if (type.multi) {
result.multi[type.kind].push(type);
result.multi['fallback'].push(type);
} else {
result[type.kind][type.tag] = result['fallback'][type.tag] = type;
}
}
for (index = 0, length = arguments.length; index < length; index += 1) {
arguments[index].forEach(collectType);
}
return result;
}
function Schema(definition) {
return this.extend(definition);
}
Schema.prototype.extend = function extend(definition) {
var implicit = [];
var explicit = [];
if (definition instanceof Type) {
// Schema.extend(type)
explicit.push(definition);
} else if (Array.isArray(definition)) {
// Schema.extend([ type1, type2, ... ])
explicit = explicit.concat(definition);
} else if (definition && (Array.isArray(definition.implicit) || Array.isArray(definition.explicit))) {
// Schema.extend({ explicit: [ type1, type2, ... ], implicit: [ type1, type2, ... ] })
if (definition.implicit) implicit = implicit.concat(definition.implicit);
if (definition.explicit) explicit = explicit.concat(definition.explicit);
} else {
throw new YAMLException('Schema.extend argument should be a Type, [ Type ], ' +
'or a schema definition ({ implicit: [...], explicit: [...] })');
}
implicit.forEach(function (type) {
if (!(type instanceof Type)) {
throw new YAMLException('Specified list of YAML types (or a single Type object) contains a non-Type object.');
}
if (type.loadKind && type.loadKind !== 'scalar') {
throw new YAMLException('There is a non-scalar type in the implicit list of a schema. Implicit resolving of such types is not supported.');
}
if (type.multi) {
throw new YAMLException('There is a multi type in the implicit list of a schema. Multi tags can only be listed as explicit.');
}
});
explicit.forEach(function (type) {
if (!(type instanceof Type)) {
throw new YAMLException('Specified list of YAML types (or a single Type object) contains a non-Type object.');
}
});
var result = Object.create(Schema.prototype);
result.implicit = (this.implicit || []).concat(implicit);
result.explicit = (this.explicit || []).concat(explicit);
result.compiledImplicit = compileList(result, 'implicit');
result.compiledExplicit = compileList(result, 'explicit');
result.compiledTypeMap = compileMap(result.compiledImplicit, result.compiledExplicit);
return result;
};
module.exports = Schema;
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