-
Notifications
You must be signed in to change notification settings - Fork 1
/
condition-builder.ts
229 lines (191 loc) · 6.91 KB
/
condition-builder.ts
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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
import { assert } from '../../error/';
import { ParameterizedCondition, ParameterList, ParameterType } from '../';
/**
* Used for building conditions. The conditions can be used with WHERE and ON
* clauses.
*/
export class ConditionBuilder {
/**
* A comparison operation.
* @param op - The comparison operator, as a string: $eq, $neq, $lt,
* $lte, $gt, $gte, $like, $notLike, $is, $isnt.
* @param prop - The name of a fully-qualified property in a query in the form
* <table-alias>.<property>.
* @param propOrParamName - Either a fully-qualified property, or a parameter name
* preceded by a colon (e.g. :someParameter).
* @param param - A replacement value if propOrParamName is a parameter name.
*/
comp(
op: string,
prop: string,
propOrParamName: string,
param?: any): ParameterizedCondition {
const paramList = new ParameterList();
const validOps = [
'$eq', '$neq', '$lt', '$lte', '$gt', '$gte', '$like', '$notLike',
'$is', '$isnt',
];
assert(validOps.indexOf(op) !== -1, `Invalid condition operator "${op}."`);
if (param !== undefined) {
assert(propOrParamName[0] === ':',
'Parameter names must start with a colon.');
paramList.addParameter(propOrParamName.substr(1), param);
}
return new ParameterizedCondition(
{[op]: {[prop]: propOrParamName}},
paramList);
}
/**
* A IN (IN or NOT IN) comparison operation.
* @param op - The comparison operator, as a string: $in, $notIn.
* @param prop - The name of a fully-qualified property in a query in the form
* <table-alias>.<property>.
* @param propsOrParamBaseName - Either a fully-qualified property, or a
* parameter name preceded by a colon (e.g. :someParameter). If a parameter
* name is provided, it's used a base name. Each property is parameterized,
* and the parameter names are suffixed with _# (e.g. :param_0, :param_1,
* ..., :param_n).
* @param params - An array of replacement values if propOrParamName is a
* parameter name.
*/
inComp(
op: string,
prop: string,
propsOrParamBaseName: string | string[],
params?: any[]): ParameterizedCondition {
const paramList = new ParameterList();
const validOps = ['$in', '$notIn'];
assert(validOps.indexOf(op) !== -1, `Invalid condition operator "${op}."`);
if (params !== undefined) {
assert(typeof propsOrParamBaseName === 'string',
'Parameter base name must be a string.');
assert(propsOrParamBaseName[0] === ':',
'Parameter names must start with a colon.');
const paramBaseName = (propsOrParamBaseName as string).substr(1);
params.forEach(param => paramList
.addParameter(paramList
.createParameterName(paramBaseName),
param));
const paramNames = paramList
.getParamNames()
.map(p => `:${p}`);
return new ParameterizedCondition(
{[op]: {[prop]: paramNames}},
paramList);
}
else {
assert(Array.isArray(propsOrParamBaseName),
'IN condition properties must be an array.');
}
return new ParameterizedCondition(
{[op]: {[prop]: propsOrParamBaseName}},
paramList);
}
/**
* Aggregate comparison (and or or).
* @param op - The comparison operator, as a string: $and or $or.
* @param conds - One or more [[ParameterizedCondition]] instances.
*/
aggregateComp(
op: string,
...conds: ParameterizedCondition[]): ParameterizedCondition {
const validOps = ['$and', '$or'];
assert(validOps.indexOf(op) !== -1, `Invalid condition operator "${op}."`);
const paramList = new ParameterList();
const cond: ParameterType = {
[op]: [
]
};
for (let i = 0; i < conds.length; ++i) {
cond[op].push(conds[i].getCond());
paramList.addParameters(conds[i].getParams());
}
return new ParameterizedCondition(cond, paramList);
}
/**
* Equal comparison. See [[ConditionBuilder.comp]].
*/
eq(prop: string, propOrParamName: string, param?: any): ParameterizedCondition {
return this.comp('$eq', prop, propOrParamName, param);
}
/**
* Not equal comparison. See [[ConditionBuilder.comp]].
*/
neq(prop: string, propOrParamName: string, param?: any): ParameterizedCondition {
return this.comp('$neq', prop, propOrParamName, param);
}
/**
* Less than comparison. See [[ConditionBuilder.comp]].
*/
lt(prop: string, propOrParamName: string, param?: any): ParameterizedCondition {
return this.comp('$lt', prop, propOrParamName, param);
}
/**
* Less than or equal comparison. See [[ConditionBuilder.comp]].
*/
lte(prop: string, propOrParamName: string, param?: any): ParameterizedCondition {
return this.comp('$lte', prop, propOrParamName, param);
}
/**
* Greater than comparison. See [[ConditionBuilder.comp]].
*/
gt(prop: string, propOrParamName: string, param?: any): ParameterizedCondition {
return this.comp('$gt', prop, propOrParamName, param);
}
/**
* Greater than or equal comparison. See [[ConditionBuilder.comp]].
*/
gte(prop: string, propOrParamName: string, param?: any): ParameterizedCondition {
return this.comp('$gte', prop, propOrParamName, param);
}
/**
* Like comparison. See [[ConditionBuilder.comp]].
*/
like(prop: string, propOrParamName: string, param?: any): ParameterizedCondition {
return this.comp('$like', prop, propOrParamName, param);
}
/**
* Not like comparison. See [[ConditionBuilder.comp]].
*/
notLike(prop: string, propOrParamName: string, param?: any): ParameterizedCondition {
return this.comp('$notLike', prop, propOrParamName, param);
}
/**
* In comparison. See [[ConditionBuilder.inComp]].
*/
in(prop: string, propsOrParamBaseName: string | string[], param?: any[]): ParameterizedCondition {
return this.inComp('$in', prop, propsOrParamBaseName, param);
}
/**
* Not in comparison. See [[ConditionBuilder.inComp]].
*/
notIn(prop: string, propsOrParamBaseName: string | string[], param?: any[]): ParameterizedCondition {
return this.inComp('$notIn', prop, propsOrParamBaseName, param);
}
/**
* Is null comparison. See [[ConditionBuilder.comp]].
*/
isNull(prop: string): ParameterizedCondition {
return this.comp('$is', prop, null);
}
/**
* Is not null comparison. See [[ConditionBuilder.comp]].
*/
isNotNull(prop: string): ParameterizedCondition {
return this.comp('$isnt', prop, null);
}
/**
* AND aggregate condition. AND multiple conditions together. See
* [[ConditionBuilder.aggregateComp]].
*/
and(...conds: ParameterizedCondition[]): ParameterizedCondition {
return this.aggregateComp('$and', ...conds);
}
/**
* OR aggregate condition. OR multiple conditions together. See
* [[ConditionBuilder.aggregateComp]].
*/
or(...conds: ParameterizedCondition[]): ParameterizedCondition {
return this.aggregateComp('$or', ...conds);
}
}