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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170

use crate::*;
use std::iter::FromIterator;

/// A wrapper around [Values](struct.Value.html) that make working with lists a little easier
pub struct List {
	value: Value,
}

impl List {
	pub fn from_value(val: &Value) -> DMResult<Self> {
		if !Self::is_list(val) {
			return Err(runtime!("attempted to create List from non-list value"));
		}

		Ok(Self { value: val.clone() })
	}

	/// Creates a new empty list.
	pub fn new() -> Self {
		Self::with_size(0)
	}

	/// Creates a new list filled with `capacity` nulls.
	pub fn with_size(capacity: u32) -> Self {
		let mut id: raw_types::lists::ListId = raw_types::lists::ListId(0);
		unsafe {
			assert_eq!(raw_types::funcs::create_list(&mut id, capacity), 1);
		}

		let raw = raw_types::values::Value {
			tag: raw_types::values::ValueTag::List,
			data: raw_types::values::ValueData { id: id.0 },
		};
		Self {
			value: unsafe { Value::from_raw_owned(raw) },
		}
	}

	pub fn get<I: Into<Value>>(&self, index: I) -> runtime::DMResult {
		let index = index.into();

		let mut value = raw_types::values::Value {
			tag: raw_types::values::ValueTag::Null,
			data: raw_types::values::ValueData { id: 0 },
		};

		// assoc funcs for everything else
		unsafe {
			if raw_types::funcs::get_assoc_element(&mut value, self.value.raw, index.raw) == 1 {
				return Ok(Value::from_raw_owned(value));
			}

			Err(runtime!(
				"failed to get assoc list entry (probably given an invalid list or key)"
			))
		}
	}

	pub fn set<K: Into<Value>, V: Into<Value>>(
		&self,
		index: K,
		value: V,
	) -> Result<(), runtime::Runtime> {
		let index = index.into();
		let value = value.into();

		unsafe {
			if raw_types::funcs::set_assoc_element(self.value.raw, index.raw, value.raw) == 1 {
				return Ok(());
			}

			Err(runtime!(
				"failed to set assoc list entry (probably given an invalid list or key)"
			))
		}
	}

	pub fn append<V: Into<Value>>(&self, value: V) {
		let value = value.into();

		unsafe {
			assert_eq!(
				raw_types::funcs::append_to_list(self.value.raw, value.raw),
				1
			);
		}
	}

	pub fn remove<V: Into<Value>>(&self, value: V) {
		let value = value.into();

		unsafe {
			assert_eq!(
				raw_types::funcs::remove_from_list(self.value.raw, value.raw),
				1
			);
		}
	}

	pub fn len(&self) -> u32 {
		let mut length: u32 = 0;
		unsafe {
			assert_eq!(raw_types::funcs::get_length(&mut length, self.value.raw), 1);
		}
		length
	}

	pub fn is_list(value: &Value) -> bool {
		match value.raw.tag {
			raw_types::values::ValueTag::List
			| raw_types::values::ValueTag::ArgList
			| raw_types::values::ValueTag::MobContents
			| raw_types::values::ValueTag::TurfContents
			| raw_types::values::ValueTag::AreaContents
			| raw_types::values::ValueTag::WorldContents
			| raw_types::values::ValueTag::ObjContents
			| raw_types::values::ValueTag::MobVars
			| raw_types::values::ValueTag::ObjVars
			| raw_types::values::ValueTag::TurfVars
			| raw_types::values::ValueTag::AreaVars
			| raw_types::values::ValueTag::ClientVars
			| raw_types::values::ValueTag::Vars
			| raw_types::values::ValueTag::MobOverlays
			| raw_types::values::ValueTag::MobUnderlays
			| raw_types::values::ValueTag::ObjOverlays
			| raw_types::values::ValueTag::ObjUnderlays
			| raw_types::values::ValueTag::TurfOverlays
			| raw_types::values::ValueTag::TurfUnderlays
			| raw_types::values::ValueTag::AreaOverlays
			| raw_types::values::ValueTag::AreaUnderlays
			| raw_types::values::ValueTag::ImageOverlays
			| raw_types::values::ValueTag::ImageUnderlays
			| raw_types::values::ValueTag::ImageVars
			| raw_types::values::ValueTag::TurfVisContents
			| raw_types::values::ValueTag::ObjVisContents
			| raw_types::values::ValueTag::MobVisContents
			| raw_types::values::ValueTag::ImageVisContents
			| raw_types::values::ValueTag::TurfVisLocs
			| raw_types::values::ValueTag::ObjVisLocs
			| raw_types::values::ValueTag::MobVisLocs
			| raw_types::values::ValueTag::WorldVars
			| raw_types::values::ValueTag::GlobalVars => true,
			_ => false,
		}
	}
}

impl FromIterator<Value> for List {
	fn from_iter<I: IntoIterator<Item = Value>>(it: I) -> Self {
		let res = Self::new();

		for val in it {
			res.append(val);
		}

		res
	}
}

impl From<List> for Value {
	fn from(list: List) -> Self {
		list.value
	}
}

impl From<&List> for Value {
	fn from(list: &List) -> Self {
		list.value.clone()
	}
}