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bindings.ts
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bindings.ts
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import Serverless from "serverless";
import { constants } from "./constants";
const defaultBindingsJson = require("./bindings.json"); // eslint-disable-line @typescript-eslint/no-var-requires
export class BindingUtils {
public static async getBindingsMetaData(serverless: Serverless) {
const bindingDisplayNames = [];
const bindingTypes = [];
const bindingSettings = [];
const bindingSettingsNames = [];
serverless.cli.log("Parsing Azure Functions Bindings.json...");
const bindingsJson = defaultBindingsJson;
for (let bindingsIndex = 0; bindingsIndex < bindingsJson[constants.bindings].length; bindingsIndex++) {
const settingsNames = [];
bindingTypes.push(bindingsJson[constants.bindings][bindingsIndex][constants.type]);
bindingDisplayNames.push(bindingsJson[constants.bindings][bindingsIndex][constants.displayName].toLowerCase());
bindingSettings[bindingsIndex] = bindingsJson[constants.bindings][bindingsIndex][constants.settings];
for (let bindingSettingsIndex = 0; bindingSettingsIndex < bindingSettings[bindingsIndex].length; bindingSettingsIndex++) {
settingsNames.push(bindingSettings[bindingsIndex][bindingSettingsIndex][constants.name]);
}
bindingSettingsNames[bindingsIndex] = settingsNames;
}
return {
bindingDisplayNames: bindingDisplayNames,
bindingTypes: bindingTypes,
bindingSettings: bindingSettings,
bindingSettingsNames: bindingSettingsNames
};
}
public static getBindingUserSettingsMetaData(azureSettings, bindingType, bindingTypeIndex, bindingDisplayNames) {
let bindingDisplayNamesIndex = bindingTypeIndex;
const bindingUserSettings = {};
if (azureSettings) {
const directionIndex = Object.keys(azureSettings).indexOf(constants.direction);
if (directionIndex >= 0) {
const key = Object.keys(azureSettings)[directionIndex];
const displayName = `$${bindingType}${azureSettings[key]}_displayName`;
bindingDisplayNamesIndex = bindingDisplayNames.indexOf(displayName.toLowerCase());
bindingUserSettings[constants.direction] = azureSettings[key];
}
}
const bindingUserSettingsMetaData = {
index: bindingDisplayNamesIndex,
userSettings: bindingUserSettings
};
return bindingUserSettingsMetaData;
}
public static getHttpOutBinding() {
const binding = {};
binding[constants.type] = "http";
binding[constants.direction] = constants.outDirection;
binding[constants.name] = "res";
return binding;
}
public static getBinding(bindingType, bindingSettings, bindingUserSettings) {
const binding = {};
binding[constants.type] = bindingType;
if (bindingUserSettings && bindingUserSettings[constants.direction]) {
binding[constants.direction] = bindingUserSettings[constants.direction];
} else if (bindingType.includes(constants.trigger)) {
binding[constants.direction] = constants.inDirection;
} else {
binding[constants.direction] = constants.outDirection;
}
for (let bindingSettingsIndex = 0; bindingSettingsIndex < bindingSettings.length; bindingSettingsIndex++) {
const name = bindingSettings[bindingSettingsIndex][constants.name];
if (bindingUserSettings && bindingUserSettings[name] !== undefined && bindingUserSettings[name] !== null) {
binding[name] = bindingUserSettings[name];
continue;
}
const value = bindingSettings[bindingSettingsIndex][constants.value];
const required = bindingSettings[bindingSettingsIndex][constants.required];
const resource = bindingSettings[bindingSettingsIndex][constants.resource];
if (required) {
const defaultValue = bindingSettings[bindingSettingsIndex][constants.defaultValue];
if (defaultValue) {
binding[name] = defaultValue;
} else if (name === constants.connection && resource.toLowerCase() === constants.storage) {
binding[name] = "AzureWebJobsStorage";
} else {
throw new Error(`Required property ${name} is missing for binding:${bindingType}`);
}
}
if (value === constants.enum && name !== constants.webHookType) {
const enumValues = bindingSettings[bindingSettingsIndex][constants.enum];
binding[name] = enumValues[0][constants.value];
}
}
return binding;
}
}