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Pods/SQLite.swift/Sources/SQLite/Extensions/FTS5.swift

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+//
+// SQLite.swift
+// https://github.com/stephencelis/SQLite.swift
+// Copyright © 2014-2015 Stephen Celis.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+//
+
+extension Module {
+    public static func FTS5(_ config: FTS5Config) -> Module {
+        return Module(name: "fts5", arguments: config.arguments())
+    }
+}
+
+/// Configuration for the [FTS5](https://www.sqlite.org/fts5.html) extension.
+///
+/// **Note:** this is currently only applicable when using SQLite.swift together with a FTS5-enabled version
+/// of SQLite.
+open class FTS5Config : FTSConfig {
+    public enum Detail : CustomStringConvertible {
+        /// store rowid, column number, term offset
+        case full
+        /// store rowid, column number
+        case column
+        /// store rowid
+        case none
+
+        public var description: String {
+            switch self {
+            case .full: return "full"
+            case .column: return "column"
+            case .none: return "none"
+            }
+        }
+    }
+
+    var detail: Detail?
+    var contentRowId: Expressible?
+    var columnSize: Int?
+
+    override public init() {
+    }
+
+    /// [External Content Tables](https://www.sqlite.org/fts5.html#section_4_4_2)
+    open func contentRowId(_ column: Expressible) -> Self {
+        self.contentRowId = column
+        return self
+    }
+
+    /// [The Columnsize Option](https://www.sqlite.org/fts5.html#section_4_5)
+    open func columnSize(_ size: Int) -> Self {
+        self.columnSize = size
+        return self
+    }
+
+    /// [The Detail Option](https://www.sqlite.org/fts5.html#section_4_6)
+    open func detail(_ detail: Detail) -> Self {
+        self.detail = detail
+        return self
+    }
+
+    override func options() -> Options {
+        var options = super.options()
+        options.append("content_rowid", value: contentRowId)
+        if let columnSize = columnSize {
+            options.append("columnsize", value: Expression<Int>(value: columnSize))
+        }
+        options.append("detail", value: detail)
+        return options
+    }
+
+    override func formatColumnDefinitions() -> [Expressible] {
+        return columnDefinitions.map { definition in
+            if definition.options.contains(.unindexed) {
+                return " ".join([definition.0, Expression<Void>(literal: "UNINDEXED")])
+            } else {
+                return definition.0
+            }
+        }
+    }
+}