2020-08-08 23:59:13 +02:00
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#!/bin/bash
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# Script used to initialise the database for a new survey. It should be run
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# with three arguments:
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#
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# ./create_survey.sh PROJECT_ID PROJECT_NAME EPSG_CODE
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#
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# In which:
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# * PROJECT_ID is the (short and unique) ID by which the project will
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# be known to the database.
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# * PROJECT_NAME is a more descriptive name for human consumption.
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# * EPSG_CODE is the EPSG code identifying the CRS for the grid data in the
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# navigation files, e.g., 32031.
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#
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# In addition to this, certain other parameters may be controlled via
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# environment variables:
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#
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# * TEMPLATE_SQL is the template code that will be used for the project schema.
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# Needless to say, the schema should be compatible with the rest of the codebase.
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# Defaults to the built-in schema found under etc/db/schema-template.sql
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#
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# * DBNAME is the name of the database in which to create the new survey. The
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# database itself is expected to have PostGIS version 3 or greater installed.
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# There is an SQL script in etc/db/ to create a new database if necessary.
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# Defaults to ‘dougal’.
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#
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# * CREATE_SURVEY_SQL is a variable that contains additional SQL statements to be
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# run after survey creation. Intended primarily to define the correct transformation
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# parameters for PostGIS until a better solution is found. Not defined by default.
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#
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2020-08-10 22:41:37 +02:00
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PREFIX=${PREFIX:-"$(dirname "$0")/.."}
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2020-08-08 23:59:13 +02:00
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PROJECT_ID="$1"
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PROJECT_NAME="$2"
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EPSG_CODE="$3"
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2020-08-10 22:41:37 +02:00
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TEMPLATE_SQL="$PREFIX/etc/db/schema-template.sql"
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2020-08-08 23:59:13 +02:00
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DBNAME=dougal
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LAST_SURVEY_ID=$(psql -U postgres -h localhost -Atc '\dn survey_[0-9]+' "$DBNAME" |sed -rn 's/^survey_([0-9]+).*$/\1/p' |sort -n |tail -n 1)
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NEXT_SURVEY_ID=$((LAST_SURVEY_ID+1))
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SCHEMA_NAME="survey_$NEXT_SURVEY_ID"
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[[ $# -ne 3 ]] && {
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echo "Wrong number of arguments"
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echo "Usage: $0 Project_ID Project_name EPSG_code"
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exit 1
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}
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echo "Creating new schema $SCHEMA_NAME with template $TEMPLATE_SQL"
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sed -r "s/_SURVEY__TEMPLATE_/$SCHEMA_NAME/g;s/_EPSG__CODE_/$EPSG_CODE/g" <"$TEMPLATE_SQL" | psql -U postgres -h localhost dougal
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echo "Adding details to projects table"
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echo "ID: $PROJECT_ID, Name: $PROJECT_NAME, Schema: $SCHEMA_NAME, EPSG: $EPSG_CODE"
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psql -U postgres -h localhost \
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--variable pid="$PROJECT_ID" \
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--variable name="$PROJECT_NAME" \
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--variable schema="$SCHEMA_NAME" \
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dougal <<< "INSERT INTO public.projects (pid, name, schema) VALUES (LOWER(:'pid'), :'name', :'schema');"
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if [[ -n "$CREATE_SURVEY_SQL" ]]; then
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# FIXME - Terrible way to do this, but we need to get the right transformations into Postgis somehow
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# Example ( retrieved from https://epsg.io/23031-1613.sql )
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# INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 23031, 'EPSG', 23031, '+proj=utm +zone=31 +ellps=intl +towgs84=-90.365,-101.13,-123.384,0.333,0.077,0.894,1.994 +units=m +no_defs ', 'PROJCS["ED50 / UTM zone 31N",GEOGCS["ED50",DATUM["European_Datum_1950",SPHEROID["International 1924",6378388,297,AUTHORITY["EPSG","7022"]],TOWGS84[-90.365,-101.13,-123.384,0.333,0.077,0.894,1.994],AUTHORITY["EPSG","6230"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4230"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",3],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","23031"]]');
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psql -U postgres -h localhost dougal <<< "$CREATE_SURVEY_SQL"
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fi
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echo "Done"
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