Add IntoIterator trait to SQL Model type

lib/src/sql/model.rs

@@ -1,18 +1,66 @@
 use crate::sql::common::take_u64;
 use crate::sql::error::IResult;
 use crate::sql::escape::escape_ident;
+use crate::sql::id::Id;
 use crate::sql::ident::ident_raw;
+use crate::sql::thing::Thing;
 use nom::branch::alt;
 use nom::character::complete::char;
 use serde::{Deserialize, Serialize};
 use std::fmt;
 
+pub struct IntoIter {
+	model: Model,
+	index: u64,
+}
+
+impl Iterator for IntoIter {
+	type Item = Thing;
+	fn next(&mut self) -> Option<Thing> {
+		match &self.model {
+			Model::Count(tb, c) => {
+				if self.index < *c {
+					self.index += 1;
+					Some(Thing {
+						tb: tb.to_string(),
+						id: Id::rand(),
+					})
+				} else {
+					None
+				}
+			}
+			Model::Range(tb, b, e) => {
+				if self.index + b <= *e {
+					self.index += 1;
+					Some(Thing {
+						tb: tb.to_string(),
+						id: Id::from(self.index),
+					})
+				} else {
+					None
+				}
+			}
+		}
+	}
+}
+
 #[derive(Clone, Debug, Eq, PartialEq, PartialOrd, Serialize, Deserialize)]
 pub enum Model {
 	Count(String, u64),
 	Range(String, u64, u64),
 }
 
+impl IntoIterator for Model {
+	type Item = Thing;
+	type IntoIter = IntoIter;
+	fn into_iter(self) -> Self::IntoIter {
+		IntoIter {
+			model: self,
+			index: 0,
+		}
+	}
+}
+
 impl fmt::Display for Model {
 	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 		match self {