83 lines
2.1 KiB
Zig
83 lines
2.1 KiB
Zig
const std = @import("std");
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const json = @import("json.zig");
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const Db = @import("Db.zig");
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const sqlite = @import("sqlite");
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const Self = @This();
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pub const Tag = struct{
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// :0 for C compatility
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name: [:0]const u8,
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value: ?[:0]const u8,
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};
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id: ?i64, // If null, the object hasn't been persisted
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tags: ?[]Tag,
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pub fn persist(self: *Self, db: *sqlite.Db) !void {
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///////////////////////////////////
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// ** Insert item **
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/////////////////////////////////
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// Insert only if there's no ID.
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if (self.id == null) {
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const query = "INSERT INTO item VALUES(NULL);";
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try db.exec(query, .{}, .{});
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// Update the ID field
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self.id = try Db.getLastId(db);
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}
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///////////////////////////////////
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// ** Insert tags **
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/////////////////////////////////
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// If the tags haven't been initialized, don't touch anything
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if (self.tags) |tags| {
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// TODO: Remove unused tag relations
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// If the count drops to zero, delete.
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// Create new tags if they don't exist
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for (tags) |*tags_i| {
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try db.exec(
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"INSERT INTO tag (name) VALUES (?);",
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.{},
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.{ .name = tags_i.name }
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);
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try db.exec(
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"INSERT INTO item_tag (item, tag, value) VALUES (?, ?, ?);",
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.{},
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.{ .item = self.id, .tag = tags_i.name, .value = tags_i.value }
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);
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}
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}
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}
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/// Convert into a JSON object. A call to deinit() is necessary from the caller's side
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pub fn toJson(self: Self) json.Obj {
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var jobj = json.Obj.newObject();
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jobj.objectAdd("id", &json.Obj.newInt64(self.id.?));
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var jtags = json.Obj.newObject();
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jobj.objectAdd("tags", &jtags);
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// If there are tags there's no point on continuing
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if (self.tags) |tags| {
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for (tags) |tag_i| {
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const jtag = if (tag_i.value) |value|
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&json.Obj.newString(value)
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else
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null;
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jtags.objectAdd(tag_i.name, jtag);
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}
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}
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return jobj;
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}
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